The Swift Gamma-Ray Burst Mission Italian site U.K. site

Swift's Gamma Ray Bursts from 2008

Nov. 18, 2008 GRB081118
TITLE:   GCN CIRCULAR
NUMBER:  8524
SUBJECT: GRB 081118: Swift detection of a burst
DATE:    08/11/18 15:10:34 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

E. A. Hoversten (PSU), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
M. Capalbi (ASDC), P.A. Curran (MSSL-UCL), M. De Pasquale (UCL-MSSL),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
O. Godet (U Leicester), D. Grupe (PSU), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
V. Mangano (INAF-IASFPA), J. Mao (INAF-OAB),
J. P. Osborne (U Leicester), C. Pagani (PSU), D. M. Palmer (LANL),
J. L. Racusin (PSU), P. Romano (INAF-IASFPA),
B. Sbarufatti (INAF-IASFPA), P. Schady (MSSL-UCL),
R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB),
E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 14:56:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081118 (trigger=334877).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 82.590, -43.302 which is 
   RA(J2000)  =  05h 30m 22s
   Dec(J2000) = -43d 18' 07"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  Even though this is an image trigger,
there appears to be a peak of about 600 counts/sec starting 20 to 40 sec
after the start of the trigger integration. 
+ Read more
Nov. 9, 2008 GRB081109a
TITLE:   GCN CIRCULAR
NUMBER:  8500
SUBJECT: GRB 081109: Swift detection of a burst
DATE:    08/11/09 07:22:59 GMT
FROM:    David Palmer at LANL  

S. Immler (CRESST/GSFC/UMD), A. P. Beardmore (U Leicester),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), S. D. Hunsberger (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the
Swift Team:

At 07:02:06 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081109 (trigger=334112).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 330.787, -54.719 which is 
   RA(J2000) = 22h 03m 09s
   Dec(J2000) = -54d 43' 06"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a triangular
structure with a duration of about 40 sec.  The peak count rate
was ~2500 counts/sec (15-350 keV), at 20 sec after the trigger. 
+ Read more
Nov. 4, 2008 GRB081104
TITLE:   GCN CIRCULAR
NUMBER:  8473
SUBJECT: GRB 081104: Swift detection of a burst
DATE:    08/11/04 09:53:20 GMT
FROM:    Ann M. Parsons at NASA/GSFC/Swift  

A. M. Parsons (GSFC), A. P. Beardmore (U Leicester),
P. J. Brown (PSU), P. A. Evans (U Leicester), C. Gronwall (PSU),
C. Guidorzi (INAF-OAB), S. T. Holland (CRESST/USRA/GSFC),
N. P. M. Kuin (MSSL), V. La Parola (INAF-IASFPA),
V. Mangano (INAF-IASFPA), J. Mao (INAF-OAB),
P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), P. Romano (INAF-IASFPA),
T. N. Ukwatta (GSFC/GWU) and H. Ziaeepour (UCL-MSSL) report on behalf
of the Swift Team:

At 09:34:42 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081104 (trigger=333666).  
The BAT on-board calculated location is 
RA, Dec 100.485, -54.732 which is 
   RA(J2000) = 06h 41m 56s
   Dec(J2000) = -54d 43' 55"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a multiple peaked
structure with a duration of about 30 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~10 sec after the trigger. 
+ Read more
Nov. 2, 2008 GRB081102
TITLE:   GCN CIRCULAR
NUMBER:  8462
SUBJECT: GRB 081102: Swift detection of a burst
DATE:    08/11/02 18:10:16 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

T. N. Ukwatta (GSFC/GWU), S. D. Barthelmy (GSFC),
J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC),
C. Gronwall (PSU), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), W.B Landsman (GSFC),
V. Mangano (INAF-IASFPA), J. Mao (INAF-OAB),
P. T. O'Brien (U Leicester), D. M. Palmer (LANL),
P. Romano (INAF-IASFPA), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU) and H. Ziaeepour (UCL-MSSL) report on
behalf of the Swift Team:

At 17:44:39 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081102 (trigger=333427).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 331.182, +52.993 which is 
   RA(J2000)  = 22h 04m 44s
   Dec(J2000) = +52d 59' 36"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows multiple peaks
with a duration of about 40 sec.  The peak count rate
was ~1800 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Oct. 29, 2008 GRB081029
TITLE:   GCN CIRCULAR
NUMBER:  8435
SUBJECT: GRB 081029: Swift detection of a burst
DATE:    08/10/29 01:52:55 GMT
FROM:    David Palmer at LANL  

T. Sakamoto (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC),
D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. Guidorzi (INAF-OAB), S. T. Holland (CRESST/USRA/GSFC),
H. A. Krimm (CRESST/GSFC/USRA), J. Mao (INAF-OAB),
D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 01:43:56 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081029 (trigger=332931).  Swift could not immediately slew
to the burst due to an Earth limb constraint. 
The BAT on-board calculated location is 
RA, Dec 346.704, -68.160 which is 
   RA(J2000) = 23h 06m 49s
   Dec(J2000) = -68d 09' 34"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  As is usual for an image trigger, 
the BAT light curve shows nothing remarkable. 
+ Read more
Oct. 28, 2008 GRB081028
TITLE:   GCN CIRCULAR
NUMBER:  8421
SUBJECT: GRB 081028: Swift detection of a burst
DATE:    08/10/28 00:44:50 GMT
FROM:    David Palmer at LANL  

C. Guidorzi (INAF-OAB), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC),
E. A. Hoversten (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL),
T. Sakamoto (NASA/UMBC), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 00:25:00 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081028 (trigger=332851).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 121.890, +2.311 which is 
   RA(J2000) = 08h 07m 34s
   Dec(J2000) = +02d 18' 40"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  Although this is a BAT image trigger,
the BAT light curve showed at least two slowly rising and falling 
peak structure with a duration of about 250 sec.  The peak count rate
of the first peak was ~600 counts/sec (15-350 keV), at ~70 sec after the 
trigger.  The second peak was comparable in size peaking at ~210 sec. 
+ Read more
Oct. 25, 2008 GRB081025
TITLE:   GCN CIRCULAR
NUMBER:  8409
SUBJECT: GRB 081025: Burst detection from Swift-BAT slew data
DATE:    08/10/26 01:18:16 GMT
FROM:    Antonio Copete at Harvard U  

A. Copete, J. Grindlay (Harvard)
J. Cummings, S. Barthelmy, C. Markwardt, N. Gehrels (NASA/GSFC)

We report the detection of a GRB candidate by the BAT Slew Survey  
(BATSS) in the slew that started at 08:22:02 UT. The ground-calculated  
position is
RA, Dec = 245.298 +60.466 deg, which is
  RA (J2000) =  16h 21m 11s
  Dec(J2000) = +60d 27' 58"
with an uncertainty of 2.87 arcmin (90% confidence, including  
systematic error). The detection was triggered by simultaneous  
independent detections of 12.9 sigma and 13.7 sigma from imaging in  
the 15-50 keV and 50-150 keV energy bands, respectively. The burst  
profile shows a series of 4 main peaks starting at T+63sec, which a  
measured T90 = 23sec and T50 = 17sec, and the burst leaves the BAT  
field-of-view at T+120.
+ Read more
Oct. 24, 2008 GRB081024
TITLE:   GCN CIRCULAR
NUMBER:  8398
SUBJECT: GRB 081024: Swift detection of a burst
DATE:    08/10/24 06:18:55 GMT
FROM:    Neil Gehrels at GSFC  

G. Stratta (ASDC), W. H. Baumgartner (GSFC/UMBC),
N. Gehrels (NASA/GSFC), E. A. Hoversten (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), M. Perri (ASDC) and
L. Vetere (PSU) report on behalf of the Swift Team:

At 05:53:08 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081024 (trigger=332516).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 27.898, +61.346 which is 
   RA(J2000) = 01h 51m 36s
   Dec(J2000) = +61d 20' 47"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a short hard peak with 
a duration of about 0.3 sec at T+0 with a short precursor peak at T-2.5 seconds. 
The peak count rate was ~6,000 counts/sec (15-350 keV), at ~0 sec after
the trigger. 
+ Read more
Oct. 22, 2008 GRB081022
TITLE:   GCN CIRCULAR
NUMBER:  8395
SUBJECT: GRB 081022: Swift detection of a burst
DATE:    08/10/22 14:39:25 GMT
FROM:    Jamie A. Kennea at PSU/Swift-XRT  

G. Stratta (ASDC), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU),
J. A. Kennea (PSU), J. Mao (INAF-OAB),
C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), K. L. Page (U Leicester),
M. Perri (ASDC), B. Preger (ASDC), P. Romano (INAF-IASFPA),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
L. Vetere (PSU) and H. Ziaeepour (UCL-MSSL) report on behalf of the
Swift Team:

At 14:23:48 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081022 (trigger=332399). 
The BAT on-board calculated location is 
RA, Dec 226.619, +12.416 which is 
   RA(J2000) = 15h 06m 28s
   Dec(J2000) = +12d 24' 58"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  This was an image trigger in BAT, but the 
light curve shows a long, smooth, 100 second wide peak with a maximum 
of ~500 cts/sec at T+50 seconds. 
+ Read more
Oct. 17, 2008 GRB081017
TITLE:   GCN CIRCULAR
NUMBER:  8388
SUBJECT: GRB 081017: Swift detection of a burst
DATE:    08/10/17 23:52:01 GMT
FROM:    David Palmer at LANL  

O. Godet (U Leicester), S. D. Barthelmy (GSFC),
P. A. Evans (U Leicester), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU), T. N. Ukwatta (GSFC/GWU) and
L. Vetere (PSU) report on behalf of the Swift Team:

At 23:38:12 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081017 (trigger=331964).  This was too close to the Sun
for Swift to slew to.  The BAT on-board calculated location is 
RA, Dec 230.180, -32.815 which is 
   RA(J2000) = 15h 20m 43s
   Dec(J2000) = -32d 48' 53"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  As is usual for an image trigger, the immediately
available BAT light curve shows no obvious variation. 
+ Read more
Oct. 16, 2008 GRB081016b
TITLE:   GCN CIRCULAR
NUMBER:  8381
SUBJECT: GRB 081016B: Swift detection of a burst
DATE:    08/10/16 20:04:12 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

K. L. Page (U Leicester), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), P. A. Evans (U Leicester),
O. Godet (U Leicester), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
W.B Landsman (GSFC), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
M. C. Stroh (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 19:47:14 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081016B (trigger=331856).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 14.615, -43.543 which is 
   RA(J2000)  =  00h 58m 28s
   Dec(J2000) = -43d 32' 34"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a single peak
with a duration of about 5 sec.  The peak count rate
was ~1600 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
Oct. 12, 2008 GRB081012
TITLE:   GCN CIRCULAR
NUMBER:  8361
SUBJECT: GRB 081012: Swift detection of a burst
DATE:    08/10/12 13:19:01 GMT
FROM:    David Palmer at LANL  

M. C. Stroh (PSU), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU),
P. A. Evans (U Leicester), D. Grupe (PSU),
S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU),
J. A. Kennea (PSU), D. M. Palmer (LANL), D. Perez (U Leicester),
J. L. Racusin (PSU), T. Sakamoto (NASA/UMBC),
T. N. Ukwatta (GSFC/GWU), L. Vetere (PSU) and H. Ziaeepour (UCL-MSSL)
report on behalf of the Swift Team:

At 13:10:23 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081012 (trigger=331475).  Swift did not immediately slew due to
the Earth limb constraint.  The BAT on-board calculated location is 
RA, Dec 30.217, -17.641 which is 
   RA(J2000) = 02h 00m 52s
   Dec(J2000) = -17d 38' 28"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single-peaked
structure with a duration of about 20 sec.  The peak count rate
was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Oct. 11, 2008 GRB081011
TITLE:   GCN CIRCULAR
NUMBER:  8355
SUBJECT: GRB 081011: Swift detection of a burst
DATE:    08/10/11 00:57:02 GMT
FROM:    David Palmer at LANL  

D. Grupe (PSU), A. P. Beardmore (U Leicester),
P. A. Evans (U Leicester), S. T. Holland (CRESST/USRA/GSFC),
E. A. Hoversten (PSU), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
D. M. Palmer (LANL), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU),
M. C. Stroh (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 00:28:50 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081011 (trigger=331332).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 220.361, +33.607 which is 
   RA(J2000) = 14h 41m 27s
   Dec(J2000) = +33d 36' 27"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single complex peak
structure with a duration of about 15 sec.  The peak count rate
was ~1100 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Oct. 8, 2008 GRB081008
TITLE:   GCN CIRCULAR
NUMBER:  8344
SUBJECT: GRB 081008: Swift detection of a burst with optical afterglow
DATE:    08/10/08 20:12:50 GMT
FROM:    Jamie A. Kennea at PSU/Swift-XRT  

J. L. Racusin (PSU), W. H. Baumgartner (GSFC/UMBC), P. J. Brown (PSU),
D. N. Burrows (PSU), P. A. Evans (U Leicester), D. Grupe (PSU),
S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU),
J. A. Kennea (PSU), V. La Parola (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), A. M. Parsons (GSFC),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
G. Tagliaferri (INAF-OAB), T. N. Ukwatta (GSFC/GWU) and
L. Vetere (PSU) report on behalf of the Swift Team:

At 19:58:09 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081008 (trigger=331093).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 279.987, -57.464 which is 
   RA(J2000) = 18h 39m 57s
   Dec(J2000) = -57d 27' 50"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 150 sec.  The peak count rate
was ~2500 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Oct. 7, 2008 GRB081007
TITLE:   GCN CIRCULAR
NUMBER:  8330
SUBJECT: GRB 081007: Swift detection of a burst with optical afterglow
DATE:    08/10/07 05:41:22 GMT
FROM:    Wayne Baumgartner at GSFC  

W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (NASA/UMBC),
P. A. Evans (U Leicester), S. D. Hunsberger (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), K. L. Page (U Leicester),
D. M. Palmer (LANL), A. M. Parsons (GSFC), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester) and M. C. Stroh (PSU) report on behalf
of the Swift Team:

At 05:23:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 081007 (trigger=330856).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 339.976, -40.136 which is 
   RA(J2000) = 22h 39m 54s
   Dec(J2000) = -40d 08' 08"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 25 sec.  The peak count rate
was 1500 counts/sec (15-350 keV), at 1 sec after the trigger. 
+ Read more
Sept. 28, 2008 GRB080928
TITLE:   GCN CIRCULAR
NUMBER:  8292
SUBJECT: GRB 080928: Swift detection of a burst with an optical counterpart
DATE:    08/09/28 15:16:04 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

T. Sakamoto (NASA/UMBC), S. D. Barthelmy (GSFC),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. Guidorzi (INAF-OAB), S. T. Holland (CRESST/USRA/GSFC),
J. Mao (INAF-OAB), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), A. M. Parsons (GSFC) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 15:01:32 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080928 (trigger=326115).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 95.084, -55.173 which is 
   RA(J2000) = 06h 20m 20s
   Dec(J2000) = -55d 10' 23"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  This is an image trigger so as usual
the BAT lightcurve shows nothing. 
+ Read more
Sept. 19, 2008 GRB080919
TITLE:   GCN CIRCULAR
NUMBER:  8270
SUBJECT: GRB 080919: Swift detection of a short burst
DATE:    08/09/19 00:41:17 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

B. Preger (ASDC), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), S. D. Hunsberger (PSU),
S. Immler (CRESST/GSFC/UMD), H. A. Krimm (CRESST/GSFC/USRA),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
D. M. Palmer (LANL), M. Perri (ASDC), T. Sakamoto (NASA/UMBC),
M. Stamatikos (NASA/ORAU), G. Stratta (ASDC), M. C. Stroh (PSU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 00:05:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080919 (trigger=325268).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 265.289, -42.396 which is 
   RA(J2000)  =  17h 41m 09s
   Dec(J2000) = -42d 23' 45"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a single spike
with a duration of about 1 sec.  The peak count rate
was ~3300 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Sept. 16, 2008 GRB080916b
TITLE:   GCN CIRCULAR
NUMBER:  8240
SUBJECT: GRB 080916B: Swift detection of a burst
DATE:    08/09/16 14:55:24 GMT
FROM:    Jamie A. Kennea at PSU/Swift-XRT  

G. Stratta (ASDC), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU),
S. D. Hunsberger (PSU), J. A. Kennea (PSU),
H. A. Krimm (CRESST/GSFC/USRA), J. Mao (INAF-OAB),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), S. R. Oates (UCL-MSSL),
J. P. Osborne (U Leicester), K. L. Page (U Leicester),
M. Perri (ASDC), B. Preger (ASDC), R. L. C. Starling (U Leicester),
M. C. Stroh (PSU) and T. N. Ukwatta (GSFC/GWU) report on behalf of
the Swift Team:

At 14:44:47 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080916B (trigger=324907).  The BAT on-board calculated location is 
RA, Dec 163.624, +69.044 which is 
   RA(J2000) = 10h 54m 30s
   Dec(J2000) = +69d 02' 39"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a multi-peaked
structure with a duration of about 50 sec.  The peak count rate
was ~750 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Sept. 16, 2008 GRB080916
TITLE:   GCN CIRCULAR
NUMBER:  8237
SUBJECT: GRB 080916: Swift detection of a burst with optical afterglow
DATE:    08/09/16 10:03:53 GMT
FROM:    David Palmer at LANL  

H. Ziaeepour (UCL-MSSL), L. Vetere (PSU),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
S. Campana (INAF-OAB), P. A. Evans (U Leicester), C. Gronwall (PSU),
H. A. Krimm (CRESST/GSFC/USRA), N. P. M. Kuin (MSSL),
V. Mangano (INAF-IASFPA), J. Mao (INAF-OAB), S. R. Oates (UCL-MSSL),
K. L. Page (U Leicester), D. M. Palmer (LANL), B. Preger (ASDC),
P. Romano (INAF-IASFPA), T. Sakamoto (NASA/UMBC),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 09:45:20 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080916 (trigger=324895).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 336.302, -57.022 which is 
   RA(J2000) = 22h 25m 12s
   Dec(J2000) = -57d 01' 17"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 60 sec.  The peak count rate
was ~5000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Sept. 15, 2008 GRB080915b
TITLE:   GCN CIRCULAR
NUMBER:  8234
SUBJECT: GRB 080915B: Swift detection of a burst
DATE:    08/09/15 16:04:26 GMT
FROM:    David Palmer at LANL  

H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), J. Mao (INAF-OAB), P. T. O'Brien (U Leicester),
S. R. Oates (UCL-MSSL), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC),
D. Perez (U Leicester), M. Perri (ASDC), T. Sakamoto (NASA/UMBC),
R. L. C. Starling (U Leicester), G. Stratta (ASDC) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 15:53:35 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080915B (trigger=324805). The BAT on-board calculated 
location is RA, Dec 213.078, -11.473 which is 
   RA(J2000) = 14h 12m 19s
   Dec(J2000) = -11d 28' 23"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a single FRED peak
structure with a duration of about 5 sec.  The peak count rate
was ~13,000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Sept. 15, 2008 GRB080915
TITLE:   GCN CIRCULAR
NUMBER:  8227
SUBJECT: GRB 080915: Swift detection of a burst
DATE:    08/09/15 00:14:56 GMT
FROM:    David Palmer at LANL  

S. R. Oates (UCL-MSSL), A. P. Beardmore (U Leicester),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC),
K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC),
R. L. C. Starling (U Leicester) and T. N. Ukwatta (GSFC/GWU) report
on behalf of the Swift Team:

At 00:02:49 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080915 (trigger=324744). The BAT on-board calculated location 
is RA, Dec 18.004, -76.014 which is 
   RA(J2000) = 01h 12m 01s
   Dec(J2000) = -76d 00' 51"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single-peaked
structure with a duration of about 20 sec.  The peak count rate
was ~700 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
Sept. 13, 2008 GRB080913
TITLE:   GCN CIRCULAR
NUMBER:  8217
SUBJECT: GRB 080913: Swift detection of a burst
DATE:    08/09/13 07:03:29 GMT
FROM:    David Palmer at LANL  

P. Schady (MSSL-UCL), A. P. Beardmore (U Leicester),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
O. Godet (U Leicester), C. Gronwall (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), K. L. Page (U Leicester),
D. M. Palmer (LANL), A. M. Parsons (GSFC), D. Perez (U Leicester),
R. L. C. Starling (U Leicester) and E. Troja (INAF-IASFPA) report on
behalf of the Swift Team:

At 06:46:54 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080913 (trigger=324561).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 65.725, -25.110 which is 
   RA(J2000) = 04h 22m 54s
   Dec(J2000) = -25d 06' 36"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 10 sec.  The peak count rate
was ~800 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
Sept. 6, 2008 GRB080906
TITLE:   GCN CIRCULAR
NUMBER:  8186
SUBJECT: GRB 080906: Swift detection of a burst with optical afterglow
DATE:    08/09/06 13:52:03 GMT
FROM:    David Burrows at PSU/Swift  

L. Vetere (PSU), S. D. Barthelmy (GSFC), P. J. Brown (PSU),
D. N. Burrows (PSU), M. M. Chester (PSU), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), H. A. Krimm (CRESST/GSFC/USRA),
J. Mao (INAF-OAB), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), J. L. Racusin (PSU),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
G. Tagliaferri (INAF-OAB), E. Troja (INAF-IASFPA) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 13:33:16 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080906 (trigger=323984).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 227.890, -80.486 which is 
   RA(J2000) = 15h 11m 34s
   Dec(J2000) = -80d 29' 09"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed one major peak
of duration ~50 sec, with possible smaller peaks.  The peak count rate
was ~2000 counts/sec (15-350 keV), at ~10 sec after the trigger. 
+ Read more
Sept. 5, 2008 GRB080905b
TITLE:   GCN CIRCULAR
NUMBER:  8182
SUBJECT: GRB 080905B: Swift detection of a burst with possible optical counterpart
DATE:    08/09/05 17:22:03 GMT
FROM:    Jamie A. Kennea at PSU/Swift-XRT  

M. C. Stroh (PSU), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), S. Immler (CRESST/GSFC/UMD),
J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
C. Pagani (PSU), K. L. Page (U Leicester), B. Preger (ASDC),
J. L. Racusin (PSU), T. Sakamoto (NASA/UMBC), P. Schady (MSSL-UCL),
R. L. C. Starling (U Leicester) and L. Vetere (PSU) report on behalf
of the Swift Team:

At 16:55:45 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080905B (trigger=323898).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 301.723, -62.571 which is 
   RA(J2000) = 20h 06m 53s
   Dec(J2000) = -62d 34' 15"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed three well separated
peaks each about 10 seconds long with a total burst duration of about 
90 sec.  The peak count rate was ~2000 counts/sec (15-350 keV), at ~4 sec 
after the trigger. 
+ Read more
Sept. 5, 2008 GRB080905
TITLE:   GCN CIRCULAR
NUMBER:  8180
SUBJECT: GRB 080905: Swift detection of a probably-short burst
DATE:    08/09/05 12:19:45 GMT
FROM:    Claudio Pagani at PSU/Swift-XRT  

C. Pagani (PSU), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), M. M. Chester (PSU),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), D. Grupe (PSU),
S. T. Holland (CRESST/USRA/GSFC), H. A. Krimm (CRESST/GSFC/USRA),
J. Mao (INAF-OAB), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester),
D. M. Palmer (LANL), B. Preger (ASDC), J. L. Racusin (PSU),
P. Romano (INAF-IASFPA), B. Sbarufatti (INAF-IASFPA),
P. Schady (MSSL-UCL), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), M. C. Stroh (PSU),
E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 11:58:54 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080905 (trigger=323870).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 287.662, -18.877 which is 
   RA(J2000) = 19h 10m 39s
   Dec(J2000) = -18d 52' 37"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows 3 peaks with a total 
duration of about 2 sec.  The spectrum is hard, with most response above
25 keV in the BAT energy range. The peak count rate was ~4500 counts/sec 
(15-350 keV), at ~0 sec after the trigger. 
+ Read more
Sept. 3, 2008 GRB080903
TITLE:   GCN CIRCULAR
NUMBER:  8169
SUBJECT: GRB 080903: Swift detection of a burst
DATE:    08/09/03 01:38:31 GMT
FROM:    David Burrows at PSU/Swift  

D. Grupe (PSU), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU),
M. M. Chester (PSU), J. R. Cummings (NASA/UMBC),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
D. M. Palmer (LANL), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 01:12:23 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080903 (trigger=323542).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 86.797, +51.326 which is 
   RA(J2000) = 05h 47m 11s
   Dec(J2000) = +51d 19' 35"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a broad single-peaked
structure with a duration of about 50 sec.  The peak count rate
was 1250 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
August 22, 2008 GRB080822b
TITLE:   GCN CIRCULAR
NUMBER:  8117
SUBJECT: GRB 080822B: Swift detection of a burst
DATE:    08/08/22 21:27:55 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. T. Holland (CRESST/USRA/GSFC), S. D. Barthelmy (GSFC),
J. R. Cummings (NASA/UMBC), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL),
M. Perri (ASDC), B. Preger (ASDC), R. L. C. Starling (U Leicester)
and G. Stratta (ASDC) report on behalf of the Swift Team:

At 21:02:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080822 (trigger=321376).  Swift did not slew to this burst
because of the Moon observing constraint.  It will come out of Moon constraint
early 26 Aug 08 UT. 
The BAT on-board calculated location is 
RA, Dec 63.495, +25.743, which is 
   RA(J2000)  =  04h 13m 59s
   Dec(J2000) = +25d 44' 34"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT TDRSS light curve does not show anything
significant which is typical for an image trigger. 
+ Read more
August 10, 2008 GRB080810
TITLE:   GCN CIRCULAR
NUMBER:  8080
SUBJECT: GRB 080810: Swift detection of a burst with a bright optical afterglow
DATE:    08/08/10 13:31:39 GMT
FROM:    David Burrows at PSU/Swift  

K. L. Page (U Leicester), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
P. A. Evans (U Leicester), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
N. P. M. Kuin (MSSL), J. Mao (INAF-OAB), F. E. Marshall (NASA/GSFC),
D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester) and T. N. Ukwatta (GSFC/GWU) report
on behalf of the Swift Team:

At 13:10:12 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080810 (trigger=319584).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 356.779, +0.320 which is 
   RA(J2000) = 23h 47m 07s
   Dec(J2000) = +00d 19' 11"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a multiple-peaked
structure with a duration of about 140 sec, including a peak during the
time of the XRT/UVOT observations.  The peak count rate
was ~3000 counts/sec (15-350 keV), at ~22 sec after the trigger. 
+ Read more
August 5, 2008 GRB080805
TITLE:   GCN CIRCULAR
NUMBER:  8059
SUBJECT: GRB 080805: Swift detection of a burst
DATE:    08/08/05 08:13:07 GMT
FROM:    David Palmer at LANL  

C. Pagani (PSU), W. H. Baumgartner (GSFC/UMBC), M. M. Chester (PSU),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
D. Grupe (PSU), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), J. Mao (INAF-OAB),
A. Moretti (INAF-OAB), K. L. Page (U Leicester), D. M. Palmer (LANL),
J. L. Racusin (PSU), P. Romano (INAF-IASFPA) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 07:41:34 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080805 (trigger=319036).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 314.231, -62.438 which is 
   RA(J2000) = 20h 56m 55s
   Dec(J2000) = -62d 26' 16"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a FRED-like
structure with a duration of about 50 sec.  The peak count rate
was ~2600 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
August 4, 2008 GRB080804
TITLE:   GCN CIRCULAR
NUMBER:  8057
SUBJECT: GRB 080804: Swift detection of a burst with optical afterglow
DATE:    08/08/04 23:37:27 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. L. Racusin (PSU), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), M. M. Chester (PSU),
N. Gehrels (NASA/GSFC), D. Grupe (PSU),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
C. Pagani (PSU), D. M. Palmer (LANL), M. C. Stroh (PSU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 23:20:14 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080804 (trigger=319016).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 328.701, -53.195 which is 
   RA(J2000)  =  21h 54m 48s
   Dec(J2000) = -53d 11' 40"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows multiple overlapping
peaks with a duration of about 20 sec.  The peak count rate
was ~1500 counts/sec (15-350 keV), at ~3 sec after the trigger. 
+ Read more
August 2, 2008 GRB080802
TITLE:   GCN CIRCULAR
NUMBER:  8051
SUBJECT: GRB 080802: Swift detection of a probable burst
DATE:    08/08/02 15:46:43 GMT
FROM:    David Palmer at LANL  

W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
M. M. Chester (PSU), C. B. Markwardt (CRESST/GSFC/UMD),
D. M. Palmer (LANL) and E. Troja (INAF-IASFPA) report on behalf of
the Swift Team:

At 15:12:21 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080802 (trigger=318832).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 270.748, -32.333 which is 
   RA(J2000) = 18h 02m 60s
   Dec(J2000) = -32d 19' 59"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a complex
structure with a duration of about 50 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
July 27, 2008 GRB080727c
TITLE:   GCN CIRCULAR
NUMBER:  8035
SUBJECT: GRB 080727C: Swift detection of a burst
DATE:    08/07/27 23:28:30 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. M. Parsons (GSFC), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), S. T. Holland (CRESST/USRA/GSFC),
E. A. Hoversten (PSU), S. D. Hunsberger (PSU), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), T. Sakamoto (NASA/UMBC),
R. L. C. Starling (U Leicester), M. C. Stroh (PSU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 23:07:35 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080727C (trigger=318170).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 32.645, +64.151 which is 
   RA(J2000)  = 02h 10m 35s
   Dec(J2000) = +64d 09' 05"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows multiple peaks
with a duration of about 100 sec.  The peak count rate
was ~3500 counts/sec (15-350 keV), at ~25 sec after the trigger. 
+ Read more
July 27, 2008 GRB080727b
TITLE:   GCN CIRCULAR
NUMBER:  8022
SUBJECT: GRB 080727B: Swift detection of a bright burst
DATE:    08/07/27 08:30:44 GMT
FROM:    David Palmer at LANL  

S. Immler (CRESST/GSFC/UMD), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), P. A. Evans (U Leicester),
C. Guidorzi (INAF-OAB), S. D. Hunsberger (PSU), W.B Landsman (GSFC),
C. B. Markwardt (CRESST/GSFC/UMD), K. L. Page (U Leicester),
D. M. Palmer (LANL), A. M. Parsons (GSFC), D. Perez (U Leicester),
T. Sakamoto (NASA/UMBC) and R. L. C. Starling (U Leicester) report on
behalf of the Swift Team:

At 08:13:24 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080727B (trigger=318101).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 276.870, +1.172 which is 
   RA(J2000) = 18h 27m 29s
   Dec(J2000) = +01d 10' 20"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 10 sec.  The peak count rate
was ~18,000 counts/sec (15-350 keV), at 6 sec after the trigger. 
+ Read more
July 27, 2008 GRB080727a
TITLE:   GCN CIRCULAR
NUMBER:  8021
SUBJECT: GRB 080727: Swift detection of a burst
DATE:    08/07/27 06:16:46 GMT
FROM:    David Palmer at LANL  

S. Immler (CRESST/GSFC/UMD), W. H. Baumgartner (GSFC/UMBC),
N. Gehrels (NASA/GSFC), S. D. Hunsberger (PSU), W.B Landsman (GSFC),
C. B. Markwardt (CRESST/GSFC/UMD), K. L. Page (U Leicester),
D. M. Palmer (LANL), A. M. Parsons (GSFC), D. Perez (U Leicester),
T. Sakamoto (NASA/UMBC) and T. N. Ukwatta (GSFC/GWU) report on behalf
of the Swift Team:

At 05:57:39 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080727 (trigger=318094).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 208.389, -18.549 which is 
   RA(J2000) = 13h 53m 33s
   Dec(J2000) = -18d 32' 55"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single peak
structure with a duration of about 5 sec.  The peak count rate
was ~700 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
July 25, 2008 GRB080725
TITLE:   GCN CIRCULAR
NUMBER:  8014
SUBJECT: GRB 080725: Swift detection of a burst
DATE:    08/07/25 10:43:53 GMT
FROM:    David Palmer at LANL  

H. A. Krimm (CRESST/GSFC/USRA), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), P. A. Evans (U Leicester),
S. D. Hunsberger (PSU), S. Immler (CRESST/GSFC/UMD),
J. Mao (INAF-OAB), P. T. O'Brien (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), B. Preger (ASDC),
R. L. C. Starling (U Leicester), G. Stratta (ASDC) and
L. Vetere (PSU) report on behalf of the Swift Team:

At 10:26:14 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080725 (trigger=317888).  The BAT on-board calculated location is 
RA, Dec 121.715, -13.990 which is 
   RA(J2000) = 08h 06m 52s
   Dec(J2000) = -13d 59' 23"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 60 sec.  The peak count rate
was ~2800 counts/sec (15-350 keV), at ~3 sec after the trigger. 
+ Read more
July 23, 2008 GRB080723
TITLE:   GCN CIRCULAR
NUMBER:  8000
SUBJECT: GRB 080723: Swift detection of a burst
DATE:    08/07/23 04:40:07 GMT
FROM:    David Palmer at LANL  

M. Stamatikos (NASA/ORAU), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), S. T. Holland (CRESST/USRA/GSFC),
S. D. Hunsberger (PSU), H. A. Krimm (CRESST/GSFC/USRA),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
K. L. Page (U Leicester), D. M. Palmer (LANL) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 04:19:24 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080723 (trigger=317662).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 274.512, -6.923 which is 
   RA(J2000) = 18h 18m 03s
   Dec(J2000) = -06d 55' 20"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  Because the BAT light curve has not been
received, we cannot comment on the burst profile at this time.  However,
there is a strong 8.4 sigma excess detected in the scaled map image, 
which strongly suggests a real gamma-ray burst occurred. 
+ Read more
July 21, 2008 GRB080721
TITLE:   GCN CIRCULAR
NUMBER:  7988
SUBJECT: GRB 080721: Swift detection of a burst with a bright optical counterpart. 
DATE:    08/07/21 10:42:45 GMT
FROM:    David Palmer at LANL  

F. E. Marshall (NASA/GSFC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), V. Mangano (INAF-IASFPA),
P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), M. Perri (ASDC), B. Preger (ASDC),
P. Romano (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), T. N. Ukwatta (GSFC/GWU),
P. A. Ward (MSSL-UCL) and H. Ziaeepour (UCL-MSSL) report on behalf of
the Swift Team:

At 10:25:16 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080721 (trigger=317508).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 224.471, -11.712 which is 
   RA(J2000) = 14h 57m 53s
   Dec(J2000) = -11d 42' 43"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed at least 4 peaks
structure with a duration of about 35 sec.  The peak count rate
was ~19k counts/sec (15-350 keV), at ~0 sec after the trigger,
during the second peak. 
+ Read more
July 14, 2008 GRB080714
TITLE:   GCN CIRCULAR
NUMBER:  7978
SUBJECT: GRB 080714: Swift detection of a burst
DATE:    08/07/14 18:11:28 GMT
FROM:    David Palmer at LANL  

M. Perri (ASDC), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC),
E. A. Hoversten (PSU), J. A. Kennea (PSU),
H. A. Krimm (CRESST/GSFC/USRA), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), B. Preger (ASDC), P. Schady (MSSL-UCL),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
G. Stratta (ASDC), M. C. Stroh (PSU), D. E. Vanden Berk (PSU) and
L. Vetere (PSU) report on behalf of the Swift Team:

At 17:52:56 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080714 (trigger=316910).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 188.109, -60.279 which is 
   RA(J2000) = 12h 32m 26s
   Dec(J2000) = -60d 16' 42"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single-peaked
structure with a duration of about 40 sec.  The peak count rate
was ~5000 counts/sec (15-350 keV), at ~1 sec after the trigger. 
+ Read more
July 10, 2008 GRB080710
TITLE:   GCN CIRCULAR
NUMBER:  7957
SUBJECT: GRB 080710: Swift detection of a burst
DATE:    08/07/10 07:29:01 GMT
FROM:    Boris Sbarufatti at INAF-IASF-Pa  

B. Sbarufatti (INAF-IASFPA), W. H. Baumgartner (GSFC/UMBC),
P. A. Evans (U Leicester), C. Guidorzi (INAF-OAB),
E. A. Hoversten (PSU), V. La Parola (INAF-IASFPA),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
K. L. Page (U Leicester), P. Romano (INAF-IASFPA) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 07:13:10 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080710 (trigger=316534).  The BAT on-board calculated location is 
RA, Dec 8.257, +19.492 which is 
   RA(J2000) = 00h 33m 02s
   Dec(J2000) = +19d 29' 31"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single-peaked
structure with a duration of about 20 sec.  The peak count rate
was ~1,000 counts/sec (15-350 keV), at 0 sec after the trigger. 
+ Read more
July 7, 2008 GRB080707
TITLE:   GCN CIRCULAR
NUMBER:  7947
SUBJECT: GRB 080707: Swift detection of a burst
DATE:    08/07/07 08:47:33 GMT
FROM:    David Palmer at LANL  

P. Schady (MSSL-UCL), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), A. A. Breeveld (MSSL),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. Guidorzi (INAF-OAB), H. A. Krimm (CRESST/GSFC/USRA),
C. B. Markwardt (CRESST/GSFC/UMD), A. Moretti (INAF-OAB),
P. T. O'Brien (U Leicester), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), R. L. C. Starling (U Leicester) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 08:27:53 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080707 (trigger=316204).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 32.632, +33.103 which is 
   RA(J2000) = 02h 10m 32s
   Dec(J2000) = +33d 06' 11"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 40 sec.  The peak count rate
was ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
July 3, 2008 GRB080703
TITLE:   GCN CIRCULAR
NUMBER:  7936
SUBJECT: GRB 080703: Swift detection of a burst with optical afterglow
DATE:    08/07/03 19:17:07 GMT
FROM:    David Palmer at LANL  

H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC), M. M. Chester (PSU),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), O. Godet (U Leicester),
H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), P. Schady (MSSL-UCL),
R. L. C. Starling (U Leicester), M. C. Stroh (PSU),
T. N. Ukwatta (GSFC/GWU), D. E. Vanden Berk (PSU) and
P. A. Ward (MSSL-UCL) report on behalf of the Swift Team:

At 19:00:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080703 (trigger=315819).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 101.867, -63.222 which is 
   RA(J2000)  =  06h 47m 28s
   Dec(J2000) = -63d 13' 19"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a single peak
with a duration of about 5 sec.  The peak count rate
was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
July 2, 2008 GRB080702b
TITLE:   GCN CIRCULAR
NUMBER:  7924
SUBJECT: GRB 080702B : Burst detected in BAT during Swift slew
DATE:    08/07/02 20:18:23 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

Jay R. Cummings (NASA/UMBC), A. Copete (Harvard),
J. Grindlay (Harvard), D. Palmer (LANL),
for the Swift-BAT and BATSS teams


At 01:10:41, Swift-BAT observed GRB 080702B. The burst occurred
during a preplanned Swift slew maneuver. The rate increase was
noted during a routine check of the counting rates for missed out-
of-field and slew bursts. A GRB candidate was automatically 
detected by the BAT Slew Survey (BATSS) with 5.9 sigma in the 
S band (15-50 keV) and 6.5 sigma in the B band (15-150keV). 
The burst profile is FRED-like with ~3sec rise and ~30sec decay. 
The peak count rate is 0.05cts/sec (S band) and 0.04cts/sec (B band). 
BATSS automated analysis measured T90 = 10.5sec and T50 = 5.5sec, 
and a position 

RA = 23h 42m 24s, DEC = -05d 29' 23" 

with a 90% confidence radius of 6.4arcmin. 
+ Read more
July 2, 2008 GRB080702a
TITLE:   GCN CIRCULAR
NUMBER:  7920
SUBJECT: GRB 080702: Swift detection of a short burst
DATE:    08/07/02 12:10:31 GMT
FROM:    David Palmer at LANL  

M. De Pasquale (UCL-MSSL), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. Guidorzi (INAF-OAB), J. A. Kennea (PSU), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (INAF-IASFPA), T. Sakamoto (NASA/UMBC),
B. Sbarufatti (INAF-IASFPA), P. Schady (MSSL-UCL),
M. Stamatikos (NASA/ORAU), E. Troja (INAF-IASFPA),
T. N. Ukwatta (GSFC/GWU) and P. A. Ward (MSSL-UCL) report on behalf
of the Swift Team:

At 11:50:43 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080702 (trigger=315710).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 312.853, +72.308 which is 
   RA(J2000) = 20h 51m 25s
   Dec(J2000) = +72d 18' 28"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with the second peak larger and a total duration of 
about 1.5 sec.  The peak count rate was ~3000 counts/sec (15-350 keV), 
at ~0.5 sec after the trigger, during the second peak. 
+ Read more
July 1, 2008 GRB080701
TITLE:   GCN CIRCULAR
NUMBER:  7910
SUBJECT: GRB 080701: Swift detection of a burst
DATE:    08/07/01 10:37:05 GMT
FROM:    David Palmer at LANL  

M. C. Stroh (PSU), A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. Guidorzi (INAF-OAB), E. A. Hoversten (PSU), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), P. Romano (INAF-IASFPA),
T. Sakamoto (NASA/UMBC), R. L. C. Starling (U Leicester),
T. N. Ukwatta (GSFC/GWU), L. Vetere (PSU) and H. Ziaeepour (UCL-MSSL)
report on behalf of the Swift Team:

At 10:13:37 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080701 (trigger=315615).  Swift did not immediately slew
due to an Earth limb constraint.  The BAT on-board calculated location is 
RA, Dec 45.837, +75.492 which is 
  RA(J2000) = 03h 03m 21s
  Dec(J2000) = +75d 29' 30"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a smooth peak
structure with a duration of ~15 sec.  The peak count rate
was ~2500 counts/sec (15-350 keV), at ~1 sec after the trigger. 
+ Read more
June 23, 2008 GRB080623
TITLE:   GCN CIRCULAR
NUMBER:  7894
SUBJECT: GRB 080623: Swift detection of a burst
DATE:    08/06/23 10:43:00 GMT
FROM:    David Palmer at LANL  

T. N. Ukwatta (GSFC/GWU), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), O. Godet (U Leicester),
S. T. Holland (CRESST/USRA/GSFC), S. D. Hunsberger (PSU),
J. A. Kennea (PSU), A. Moretti (INAF-OAB), K. L. Page (U Leicester),
D. M. Palmer (LANL), D. Perez (U Leicester), M. Perri (ASDC) and
G. Stratta (ASDC) report on behalf of the Swift Team:

At 10:25:28 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080623 (trigger=315080).  Swift did not immediately slew
because of an Earth observing constraint. 
The BAT on-board calculated location is 
RA, Dec 237.660, -62.038, which is 
   RA(J2000)  =  15h 50m 38s
   Dec(J2000) = -62d 02' 16"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showes several overlapping peaks
with a duration of about 25 sec.  The peak count rate
was ~2500 counts/sec (15-350 keV), at ~7 sec after the trigger. 
+ Read more
June 13, 2008 GRB080613b
TITLE:   GCN CIRCULAR
NUMBER:  7873
SUBJECT: GRB 080613B: Swift detection of a burst
DATE:    08/06/13 11:27:48 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. B. Markwardt (CRESST/GSFC/UMD), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), G. Cusumano (INAF-IASFPA),
C. Gronwall (PSU), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), J. Mao (INAF-OAB),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), K. L. Page (U Leicester),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
G. Tagliaferri (INAF-OAB) and H. Ziaeepour (UCL-MSSL) report on
behalf of the Swift Team:

At 11:12:37 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080613B (trigger=313954).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is
RA, Dec 173.797, -7.098 which is
   RA(J2000) = 11h 35m 11s
   Dec(J2000) = -07d 05' 53"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows multiple overlapping
peaks with a duration of about 50 sec.  The peak count rate
was ~10000 counts/sec (15-350 keV), at ~T+0 sec after the trigger. 
+ Read more
June 7, 2008 GRB080607
TITLE:   GCN CIRCULAR
NUMBER:  7847
SUBJECT: GRB 080607: Swift detection of a burst with optical afterglow
DATE:    08/06/07 06:21:44 GMT
FROM:    Vanessa Mangano at INAF-IASFPA  

V. Mangano (INAF-IASFPA), J. R. Cummings (NASA/UMBC),
G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC),
V. La Parola (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
J. P. Osborne (U Leicester), B. Sbarufatti (INAF-IASFPA) and
D. E. Vanden Berk (PSU) report on behalf of the Swift Team:

At 06:07:27 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080607 (trigger=313417).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 194.967, +15.900 which is 
   RA(J2000) = 12h 59m 52s
   Dec(J2000) = +15d 54' 01"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a multi-peak
structure with a duration of about 80 sec.  The peak count rate
was ~35000 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
June 5, 2008 GRB080605
TITLE:   GCN CIRCULAR
NUMBER:  7828
SUBJECT: GRB 080605: Swift detection of a burst with an optical afterglow
DATE:    08/06/06 00:13:48 GMT
FROM:    David Palmer at LANL  

B. Sbarufatti (INAF-IASFPA), S. D. Barthelmy (GSFC),
D. N. Burrows (PSU), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), V. La Parola (INAF-IASFPA),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (NASA/UMBC),
T. N. Ukwatta (GSFC/GWU) and D. E. Vanden Berk (PSU) report on behalf
of the Swift Team:

At 23:47:57 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080605 (trigger=313299).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 262.127, +4.002 which is 
   RA(J2000)  = 17h 28m 31s
   Dec(J2000) = +04d 00' 06"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows multiple overlapping
peaks lasting at least to T+8 sec (at which the TDRSS lightcurve is
truncated).  The peak count rate was ~17000 counts/sec (15-350 keV),
at ~1 sec after the trigger. 
+ Read more
June 4, 2008 GRB080604
TITLE:   GCN CIRCULAR
NUMBER:  7800
SUBJECT: GRB 080604: Swift detection of a burst with an optical afterglow
DATE:    08/06/04 07:38:24 GMT
FROM:    David Palmer at LANL  

V. La Parola (INAF-IASFPA), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), N. P. M. Kuin (MSSL),
J. Mao (INAF-OAB), P. T. O'Brien (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), B. Sbarufatti (INAF-IASFPA),
R. L. C. Starling (U Leicester), D. E. Vanden Berk (PSU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 07:27:01 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080604 (trigger=313116).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 236.970, +20.555 which is 
   RA(J2000) = 15h 47m 53s
   Dec(J2000) = +20d 33' 19"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a broad single peak
structure with a duration of about 70 sec.  The peak count rate
was ~300 counts/sec (15-350 keV), at ~10 sec after the trigger. 

The XRT began observing the field at 07:29:00.4 UT, 119.3 seconds after
the BAT trigger. XRT found a bright, uncatalogued X-ray source located
at RA, Dec 236.9648, +20.5572 which is equivalent to:
   RA(J2000)  = 15h 47m 51.5s
   Dec(J2000) = +20d 33' 25.9"
with an uncertainty of 5.4 arcseconds (radius, 90% containment). This
location is 19 arcseconds from the BAT onboard position, within the BAT
error circle. No event data are yet available to determine the column
density using X-ray spectroscopy. 
+ Read more
June 3, 2008 GRB080603b
TITLE:   GCN CIRCULAR
NUMBER:  7794
SUBJECT: GRB 080603B: Swift detection of a burst with optical afterglow
DATE:    08/06/03 19:59:18 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

V. Mangano (INAF-IASFPA), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), P. J. Brown (PSU),
G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC),
C. Guidorzi (INAF-OAB), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA),
N. P. M. Kuin (MSSL), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), K. M. McLean (GSFC/UMD),
P. T. O'Brien (U Leicester), C. Pagani (PSU), D. M. Palmer (LANL),
A. M. Parsons (GSFC), J. L. Racusin (PSU), T. Sakamoto (NASA/UMBC),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
T. N. Ukwatta (GSFC/GWU), D. E. Vanden Berk (PSU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 19:38:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080603B (trigger=313087).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 176.528, +68.076 which is 
   RA(J2000)  =  11h 46m 07s
   Dec(J2000) = +68d 04' 33"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows three main peaks
with a duration of about 70 sec.  The peak count rate
was ~8000 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
June 2, 2008 GRB080602
TITLE:   GCN CIRCULAR
NUMBER:  7781
SUBJECT: GRB 080602: Swift detection of a burst
DATE:    08/06/02 01:41:09 GMT
FROM:    David Palmer at LANL  

A. P. Beardmore (U Leicester), S. D. Barthelmy (GSFC),
J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU),
J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), K. M. McLean (GSFC/UMD),
K. L. Page (U Leicester), D. M. Palmer (LANL) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 01:30:28 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080602 (trigger=312958).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 19.173, -9.251 which is 
   RA(J2000) = 01h 16m 41s
   Dec(J2000) = -09d 15' 02"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed two well-separated
peaks with a total duration of about 70 sec.  The peak count rate
was ~3000 counts/sec (15-350 keV), at ~60 sec after the trigger. 
+ Read more
May 24, 2008 GRB080524
TITLE:   GCN CIRCULAR
NUMBER:  7774
SUBJECT: GRB 080524: Swift-BAT detection of a burst in ground analysis
DATE:    08/05/25 19:41:39 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

G. Sato (GSFC/ISAS), L. Barbier (GSFC), S. Barthelmy (GSFC),
W. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Grupe (PSU),
D. Hullinger (BYU-Idaho), H. Krimm (GSFC/USRA), M. Koss (GSFC/UMD),
C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC/ORAU), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC),
on behalf of the Swift-BAT team:


At 04:13:00 UT on May 24, 2008, BAT triggered on GRB 080524. The onboard
processing found a source that was not significant enough to initiate a
burst response. Routine processing on the ground of failed triggers found
a significant source (9.7 sigma) at RA, Dec 268.449, +80.143 which is:

RA 17h 53m 47.7s (J2000)
Dec 80d 8m 35s (J2000)

with an uncertainty radius of 2.5 arcmin (90% containment). The source
was 58% coded.
+ Read more
May 23, 2008 GRB080523
TITLE:   GCN CIRCULAR
NUMBER:  7767
SUBJECT: GRB 080523: Swift detection of a burst
DATE:    08/05/23 21:34:28 GMT
FROM:    David Palmer at LANL  

M. C. Stroh (PSU), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
C. Gronwall (PSU), D. Grupe (PSU), S. T. Holland (CRESST/USRA/GSFC),
H. A. Krimm (CRESST/GSFC/USRA), V. Mangano (INAF-IASFPA),
P. T. O'Brien (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), J. L. Racusin (PSU),
M. Stamatikos (NASA/ORAU), T. N. Ukwatta (GSFC/GWU) and
D. E. Vanden Berk (PSU) report on behalf of the Swift Team:

At 21:21:51 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080523 (trigger=312242).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 20.732, -64.053 which is
   RA(J2000) = 01h 22m 56s
   Dec(J2000) = -64d 03' 12"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a single peak
with a duration of about 15 sec.  The peak count rate
was ~700 counts/sec (15-350 keV), at ~5 sec after the trigger.
+ Read more
May 20, 2008 GRB080520
TITLE:   GCN CIRCULAR
NUMBER:  7753
SUBJECT: GRB 080520: Swift detection of a burst with optical afterglow
DATE:    08/05/20 22:49:07 GMT
FROM:    David Palmer at LANL  

D. Grupe (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC),
C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), V. Mangano (INAF-IASFPA),
K. M. McLean (GSFC/UMD), J. P. Osborne (U Leicester),
D. M. Palmer (LANL), D. Perez (U Leicester), T. Sakamoto (NASA/UMBC),
M. Stamatikos (NASA/ORAU), M. C. Stroh (PSU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 22:20:24 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080520 (trigger=312047).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 280.192, -55.004 which is
   RA(J2000)  =  18h 40m 46s
   Dec(J2000) = -55d 00' 13"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows two peaks
with a duration of about 15 sec.  The peak count rate
was ~700 counts/sec (15-350 keV), at ~2 sec after the trigger.
+ Read more
May 17, 2008 GRB080517
TITLE:   GCN CIRCULAR
NUMBER:  7742
SUBJECT: GRB 080517: Swift detection of a burst
DATE:    08/05/17 21:51:51 GMT
FROM:    David Burrows at PSU/Swift  

A. M. Parsons (GSFC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL) and E. Troja (U Leicester/INAF-IASFPA) report on
behalf of the Swift Team:

At 21:22:51 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080517 (trigger=311874).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 102.255, +50.731 which is
   RA(J2000) = 06h 49m 01s
   Dec(J2000) = +50d 43' 51"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a single-peaked
structure with a duration of about 20 sec.  The peak count rate
was ~500 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
May 16, 2008 GRB080516
TITLE:   GCN CIRCULAR
NUMBER:  7733
SUBJECT: GRB 080516: Swift detection of a burst
DATE:    08/05/16 00:47:29 GMT
FROM:    David Burrows at PSU/Swift  

S. T. Holland (CRESST/USRA/GSFC), S. D. Barthelmy (GSFC),
D. N. Burrows (PSU), E. A. Hoversten (PSU), J. A. Kennea (PSU),
H. A. Krimm (CRESST/GSFC/USRA), F. E. Marshall (NASA/GSFC),
K. L. Page (U Leicester), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and
E. Troja (U Leicester/INAF-IASFPA) report on behalf of the Swift
Team:

At 00:17:07 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080516 (trigger=311762).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 120.629, -26.176 which is
   RA(J2000) = 08h 02m 31s
   Dec(J2000) = -26d 10' 33"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a multi-peaked
structure with a duration of about 20 sec.  The peak count rate
was ~2500 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
May 15, 2008 GRB080515
TITLE:   GCN CIRCULAR
NUMBER:  7721
SUBJECT: GRB 080515: Swift detection of a burst
DATE:    08/05/15 06:19:28 GMT
FROM:    David Palmer at LANL  

S. T. Holland (CRESST/USRA/GSFC), A. P. Beardmore (U Leicester),
P. A. Evans (U Leicester), E. A. Hoversten (PSU),
H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD),
P. T. O'Brien (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL) and R. L. C. Starling (U Leicester) report on
behalf of the Swift Team:

At 06:01:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080515 (trigger=311658).  Swift could not slew to the burst
due to Sun constraint.  The BAT on-board calculated location is
RA, Dec 3.150, +32.599 which is
   RA(J2000) = 00h 12m 36s
   Dec(J2000) = +32d 35' 57"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve from TDRSS was
truncated by the beginning of a Malindi downlink and
is further complicated as we were coming out of the SAA at the time, but
shows activity from the trigger time to the end of available data
at T+8s, with a peak count rate of ~500 counts/s (15-350 keV).
+ Read more
May 6, 2008 GRB080506
TITLE:   GCN CIRCULAR
NUMBER:  7685
SUBJECT: GRB 080506: Swift detection of a burst with optical afterglow
DATE:    08/05/06 18:06:27 GMT
FROM:    Wayne Baumgartner at GSFC  

W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU),
M. M. Chester (PSU), G. Cusumano (INAF-IASFPA),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. Guidorzi (INAF-OAB), S. T. Holland (CRESST/USRA/GSFC),
S. Immler (CRESST/GSFC/UMD), J. A. Kennea (PSU),
V. La Parola (INAF-IASFPA), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
C. Pagani (PSU), P. Romano (INAF-IASFPA), T. Sakamoto (NASA/UMBC),
M. Stamatikos (NASA/ORAU), T. N. Ukwatta (GSFC/GWU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 17:46:21 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080506 (trigger=311159).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 329.435, +39.002 which is
   RA(J2000) = 21h 57m 44s
   Dec(J2000) = +39d 00' 08"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  As this is an image trigger, the BAT light curve does
not show meaningful emission from the burst.
+ Read more
May 3, 2008 GRB080503
TITLE:   GCN CIRCULAR
NUMBER:  7665
SUBJECT: GRB 080503: Swift detection of a short burst
DATE:    08/05/03 12:50:13 GMT
FROM:    David Burrows at PSU/Swift  

J. Mao (INAF-OAB), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU),
M. M. Chester (PSU), N. Gehrels (NASA/GSFC), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), D. M. Palmer (LANL),
P. Romano (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU) and
D. E. Vanden Berk (PSU) report on behalf of the Swift Team:

At 12:26:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080503 (trigger=310785).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 286.617, +68.778 which is
   RA(J2000) = 19h 06m 28s
   Dec(J2000) = +68d 46' 41"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a single spike
structure with a duration of about 0.5 sec, although there may
be further activity during the slew.  The peak count rate
was ~6500 counts/sec (15-350 keV), at ~0.1 sec after the trigger.
+ Read more
April 30, 2008 GRB080430
TITLE:   GCN CIRCULAR
NUMBER:  7647
SUBJECT: GRB 080430: Swift detection of a burst with optical afterglow
DATE:    08/04/30 20:16:10 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. Guidorzi (INAF-OAB), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC),
O. Godet (U Leicester), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA),
W.L Landsman (GSFC), C. B. Markwardt (CRESST/GSFC/UMD),
K. M. McLean (GSFC/UMD), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), D. Perez (U Leicester), P. Romano (INAF-IASFPA),
T. Sakamoto (NASA/UMBC), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB),
T. N. Ukwatta (GSFC/GWU), D. E. Vanden Berk (PSU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 19:53:02 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080430 (trigger=310613).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 165.322, +51.689 which is
   RA(J2000) = 11h 01m 17s
   Dec(J2000) = +51d 41' 22"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a single FRED peak
structure with a duration of about 20 sec.  The peak count rate
was ~6000 counts/sec (15-350 keV), at ~1 sec after the trigger.
+ Read more
April 26, 2008 GRB080426
TITLE:   GCN CIRCULAR
NUMBER:  7639
SUBJECT: GRB 080426: Swift detection of a possibly short burst
DATE:    08/04/26 13:49:12 GMT
FROM:    David Burrows at PSU/Swift  

H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
N. P. M. Kuin (MSSL), J. Mao (INAF-OAB),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), S. R. Oates (UCL-MSSL), C. Pagani (PSU),
D. M. Palmer (LANL), D. Perez (U Leicester),
R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB),
T. N. Ukwatta (GSFC/GWU) and P. A. Ward (MSSL-UCL) report on behalf
of the Swift Team:

At 13:23:22 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080426 (trigger=310219).  Swift slewed to the burst
after a brief delay due to Earth limb constraint.
The BAT on-board calculated location is
RA, Dec 26.574, +69.492 which is
   RA(J2000) = 01h 46m 18s
   Dec(J2000) = +69d 29' 30"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a single-peaked
structure with a duration of about 2 sec.  The peak count rate
was ~7500 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
April 13, 2008 GRB080413b
TITLE:   GCN CIRCULAR
NUMBER:  7598
SUBJECT: GRB 080413B: Swift detection of a possibly short burst with optical counterpart
DATE:    08/04/13 09:20:28 GMT
FROM:    David Palmer at LANL  

M. Stamatikos (NASA/ORAU), A. P. Beardmore (U Leicester),
N. Gehrels (NASA/GSFC), S. D. Hunsberger (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
T. Sakamoto (NASA/UMBC), R. L. C. Starling (U Leicester) and
E. Troja (U Leicester/INAF-IASFPA) report on behalf of the Swift
Team:

At 08:51:12 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080413B (trigger=309111).  Swift started slewing approximately
70 seconds after the burst. The BAT on-board calculated location is
RA, Dec 326.134, -19.969 which is
   RA(J2000) = 21h 44m 32s
   Dec(J2000) = -19d 58' 08"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a single peaked
structure with a duration of about 3 sec.  The peak count rate
was ~15,000 counts/sec (15-350 keV), at ~0.2 sec after the trigger.
+ Read more
April 13, 2008 GRB080413a
TITLE:   GCN CIRCULAR
NUMBER:  7594
SUBJECT: GRB 080413: Swift detection of a burst with an optical afterglow
DATE:    08/04/13 03:06:53 GMT
FROM:    David Palmer at LANL  

A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), S. D. Hunsberger (PSU),
J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD),
K. L. Page (U Leicester), D. M. Palmer (LANL),
T. Sakamoto (NASA/UMBC), M. Stamatikos (NASA/ORAU) and
E. Troja (U Leicester/INAF-IASFPA) report on behalf of the Swift
Team:

At 02:54:19 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080413 (trigger=309096).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 287.290, -27.679 which is
   RA(J2000) = 19h 09m 10s
   Dec(J2000) = -27d 40' 44"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a triple-peaked
structure with a duration of about 55 sec.  The peak count rate
was ~10000 counts/sec (15-350 keV), at ~1 sec after the trigger.
+ Read more
April 11, 2008 GRB080411
TITLE:   GCN CIRCULAR
NUMBER:  7584
SUBJECT: GRB 080411: Swift detection of a bright burst
DATE:    08/04/11 21:47:27 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), O. Godet (U Leicester),
S. T. Holland (CRESST/USRA/GSFC), H. A. Krimm (CRESST/GSFC/USRA),
C. B. Markwardt (CRESST/GSFC/UMD), K. M. McLean (GSFC/UMD),
C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
T. N. Ukwatta (GSFC/GWU), L. Vetere (PSU) and P. A. Ward (MSSL-UCL)
report on behalf of the Swift Team:

At 21:15:32 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080411 (trigger=309010).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 38.018, -71.342 which is
   RA(J2000)  =  02h 32m 04s
   Dec(J2000) = -71d 20' 30"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The TDRSS BAT lightcurve shows the burst
starting with a fast rise from background to ~13,000 counts/sec in
approximately 0.5 sec.  There are several peaks after that with the
fourth peak (T+19 sec) at 75,000 cnts/sec.  There are several more peaks
after that lasting out to at least T+70 sec.
+ Read more
April 9, 2008 GRB080409
TITLE:   GCN CIRCULAR
NUMBER:  7573
SUBJECT: GRB 080409: Swift detection of a burst
DATE:    08/04/09 01:46:36 GMT
FROM:    David Palmer at LANL  

S. T. Holland (CRESST/USRA/GSFC), W. H. Baumgartner (GSFC/UMBC),
D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
K. M. McLean (GSFC/UMD), K. L. Page (U Leicester),
D. M. Palmer (LANL), R. L. C. Starling (U Leicester) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 01:22:57 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080409 (trigger=308812).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 84.333, +5.085 which is
   RA(J2000) = 05h 37m 20s
   Dec(J2000) = +05d 05' 07"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 10 sec.  The peak count rate
was ~5000 counts/sec (15-350 keV), at ~0.7 sec after the trigger.
+ Read more
April 5, 2008 GRB080405
TITLE:   GCN CIRCULAR
NUMBER:  7566
SUBJECT: GRB 080405: Swift-BAT refined analysis
DATE:    08/04/07 14:25:11 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

T. Sakamoto  (GSFC/ORAU), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/UMBC), M. Stamatikos (GSFC/ORAU), T. Ukwatta (GWU),
K. McLean (GSFC/UMD), W. Baumgartner (GSFC/UMBC), E. Fenimore (LANL),
H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL),
G. Sato (GSFC/ISAS), J. Tueller (GSFC)
(i. e. the Swift-BAT team)

We report further results on GRB 080405 (Cummings et al. GCN circ
#7564) based on the BAT event data from T-1.3 to T+8.7 seconds.
This interval covers only about the first fifth of the event, and
not the interval of peak flux.

The best BAT position remains the same: RA, Dec 162.597,  -4.250 deg
which is:
RA(J2000)  = 10h 50m 23.3s,
Dec(J2000) = -4d 15' 00" (J2000)
with an uncertainty of 2.0 arcmin (radius, sys+stat, 90% containment).
+ Read more
March 30, 2008 GRB080330
TITLE:   GCN CIRCULAR
NUMBER:  7537
SUBJECT: GRB 080330: Swift detection of a burst with an optical counterpart
DATE:    08/03/30 04:02:22 GMT
FROM:    David Palmer at LANL  

J. Mao (INAF-OAB), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), K. M. McLean (GSFC/UMD), D. M. Palmer (LANL),
A. M. Parsons (GSFC), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), T. N. Ukwatta (GSFC/GWU) and
D. E. Vanden Berk (PSU) report on behalf of the Swift Team:

At 03:41:16 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080330 (trigger=308041).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 169.302, +30.570 which is
   RA(J2000) = 11h 17m 12s
   Dec(J2000) = +30d 34' 13"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a multiple-peak
structure with a duration of about 60 sec.  The peak count rate
was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
March 28, 2008 GRB080328
TITLE:   GCN CIRCULAR
NUMBER:  7525
SUBJECT: GRB 080328: Swift detection of a burst with an optical counterpart
DATE:    08/03/28 08:28:44 GMT
FROM:    David Palmer at LANL  

M. Perri (ASDC), D. N. Burrows (PSU), S. Campana (INAF-OAB),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. Guidorzi (INAF-OAB), C. B. Markwardt (CRESST/GSFC/UMD),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), P. Romano (INAF-IASFPA),
R. L. C. Starling (U Leicester), G. Stratta (ASDC),
D. E. Vanden Berk (PSU), P. A. Ward (MSSL-UCL) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 08:03:04 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080328 (trigger=307931).  Swift slewed immediately to the
burst.  The BAT on-board calculated location is 
RA, Dec 80.479, +47.524 which is
   RA(J2000) = 05h 21m 55s
   Dec(J2000) = +47d 31' 26"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a multi-peaked
structure with a duration of about 110 sec.  The peak count rate
was ~9500 counts/sec (15-350 keV), at ~10 sec after the trigger.
+ Read more
March 25, 2008 GRB080325
TITLE:   GCN CIRCULAR
NUMBER:  7512
SUBJECT: GRB 080325: Swift detection of a burst
DATE:    08/03/25 04:25:22 GMT
FROM:    David Palmer at LANL  

L. Vetere (PSU), P. J. Brown (PSU), D. Grupe (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), C. Pagani (PSU),
D. M. Palmer (LANL), J. L. Racusin (PSU), M. C. Stroh (PSU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 04:09:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080325 (trigger=307604).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 277.895, +36.511 which is
   RA(J2000) = 18h 31m 35s
   Dec(J2000) = +36d 30' 38"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  Because this is a 64-sec long image trigger, the
TDRSS lightcurve does not show any significant signal (as is typical).
+ Read more
March 20, 2008 GRB080320
TITLE:   GCN CIRCULAR
NUMBER:  7473
SUBJECT: GRB 080320: Swift detection of a burst
DATE:    08/03/20 05:08:16 GMT
FROM:    David Burrows at PSU/Swift  

D. Grupe (PSU), D. N. Burrows (PSU), M. M. Chester (PSU),
N. Gehrels (NASA/GSFC), S. Immler (CRESST/GSFC/UMD),
J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD),
D. M. Palmer (LANL), A. M. Parsons (GSFC), J. L. Racusin (PSU),
M. Stamatikos (NASA/ORAU), T. N. Ukwatta (GSFC/GWU),
D. E. Vanden Berk (PSU) and L. Vetere (PSU) report on behalf of the
Swift Team:

At 04:37:38 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080320 (trigger=306858).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 177.780, +57.144 which is
   RA(J2000) = 11h 51m 07s
   Dec(J2000) = +57d 08' 38"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a FRED
structure with a duration of about 25 sec.  The peak count rate
was ~1200 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
March 19, 2008 GRB080319d
TITLE:   GCN CIRCULAR
NUMBER:  7453
SUBJECT: GRB 080319D: Swift detection of a burst with a possible optical afterglow
DATE:    08/03/19 17:42:09 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

P. J. Brown (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
M. M. Chester (PSU), N. Gehrels (NASA/GSFC), O. Godet (U Leicester),
S. T. Holland (CRESST/USRA/GSFC), S. Immler (CRESST/GSFC/UMD),
J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA),
P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),
C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL),
M. Perri (ASDC), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), E. Troja (U Leicester/INAF-IASFPA)
and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 17:05:09 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080319D (trigger=306793).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 99.480, +23.933 which is
   RA(J2000) = 06h 37m 55s
   Dec(J2000) = +23d 56' 01"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  As is usual with an image trigger, the prompt light
curve does not not show any clear structure.  We will be able to tell more with
the full data set.
+ Read more
March 19, 2008 GRB080319c
TITLE:   GCN CIRCULAR
NUMBER:  7442
SUBJECT: GRB 080319C: Swift detection of a burst with an optical afterglow
DATE:    08/03/19 12:45:58 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. Pagani (PSU), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), O. Godet (U Leicester),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
V. Mangano (INAF-IASFPA), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), A. M. Parsons (GSFC), J. L. Racusin (PSU),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), G. Stratta (ASDC) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 12:25:56 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080319C (trigger=306778).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 258.973, +55.410 which is
   RA(J2000)  =  17h 15m 54s
   Dec(J2000) = +55d 24' 35"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows several overlapping FRED-like
peaks starting at T+0 and ending around T+20 sec.  The peak count rate
was ~8000 counts/sec (15-350 keV), at ~T+0 sec after the trigger.
+ Read more
March 19, 2008 GRB080319b
TITLE:   GCN CIRCULAR
NUMBER:  7427
SUBJECT: GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
DATE:    08/03/19 06:32:26 GMT
FROM:    David Palmer at LANL  

J. L. Racusin (PSU), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), C. Pagani (PSU),
D. M. Palmer (LANL) and M. Stamatikos (NASA/ORAU) report on behalf of
the Swift Team:

At 06:12:49 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080319B (trigger=306757).  Swift slewed immediately to
the burst. The BAT on-board calculated location is
RA, Dec 217.926, +36.303 which is
   RA(J2000) = 14h 31m 42s
   Dec(J2000) = +36d 18' 10"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed one bright but
complex peak with a duration of about 50 sec, with an extended tail.
The peak count rate was ~70,000 counts/sec (15-350 keV), at ~20 sec
after the trigger.
+ Read more
March 19, 2008 GRB080319a
TITLE:   GCN CIRCULAR
NUMBER:  7426
SUBJECT: GRB 080319A: Swift detection of a burst
DATE:    08/03/19 06:18:20 GMT
FROM:    David Palmer at LANL  

C. Pagani (PSU), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL),
J. L. Racusin (PSU) and M. Stamatikos (NASA/ORAU) report on behalf of
the Swift Team:

At 05:45:42 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080319A (trigger=306754).  The Swift slew to the burst was
delayed because of an earth constraint. The BAT on-board calculated
location is RA, Dec 206.354, +44.079 which is
   RA(J2000) = 13h 45m 25s
   Dec(J2000) = +44d 04' 44"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a multiple peaks
with a duration of about 40 sec.  The peak count rate
was ~800 counts/sec (15-350 keV), at ~10 sec after the trigger.
+ Read more
March 15, 2008 GRB080315
TITLE:   GCN CIRCULAR
NUMBER:  7416
SUBJECT: GRB 080315: Swift detection of a possible burst
DATE:    08/03/15 02:46:19 GMT
FROM:    David Palmer at LANL  

K. L. Page (U Leicester), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
M. M. Chester (PSU), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU), E. Troja (U Leicester/INAF-IASFPA) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 02:25:01 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080315 (trigger=306323).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 155.182, +41.729 which is
   RA(J2000) = 10h 20m 44s
   Dec(J2000) = +41d 43' 44"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  As is usual for a 64-second image trigger,
the TDRSS light curve shows no obvious variation.  Further BAT analysis
will rely on the Malindi-downlinked data.
+ Read more
March 10, 2008 GRB080310
TITLE:   GCN CIRCULAR
NUMBER:  7382
SUBJECT: GRB 080310: Swift detection of a burst with optical afterglow
DATE:    08/03/10 08:58:27 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. R. Cummings (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), S. Campana (INAF-OAB),
P. A. Evans (U Leicester), E. A. Hoversten (PSU),
S. D. Hunsberger (PSU), C. B. Markwardt (CRESST/GSFC/UMD),
P. T. O'Brien (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), R. L. C. Starling (U Leicester),
G. Tagliaferri (INAF-OAB) and T. N. Ukwatta (GSFC/GWU) report on
behalf of the Swift Team:

At 08:37:58 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080310 (trigger=305288).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 220.081, -0.166 which is
   RA(J2000) = 14h 40m 19s
   Dec(J2000) = -00d 09' 55"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a precursor at
T-24 seconds and multiple peaks from T-10 to T+6 seconds. The peak count
rate was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
March 7, 2008 GRB080307
TITLE:   GCN CIRCULAR
NUMBER:  7362
SUBJECT: GRB 080307: Swift detection of a burst
DATE:    08/03/07 12:01:53 GMT
FROM:    David Palmer at LANL  

S. T. Holland (CRESST/USRA/GSFC), S. D. Barthelmy (GSFC),
D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC),
G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), O. Godet (U Leicester),
C. Guidorzi (INAF-OAB), S. D. Hunsberger (PSU), J. A. Kennea (PSU),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), P. Romano (INAF-IASFPA), G. Sato (GSFC/ISAS),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and
E. Troja (U Leicester/INAF-IASFPA) report on behalf of the Swift
Team:

At 11:23:30 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080307 (trigger=305011).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 136.633, +35.168 which is
   RA(J2000) = 09h 06m 32s
   Dec(J2000) = +35d 10' 06"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a FRED
structure with a duration of at least 30 sec.  The peak count rate
was ~600 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
March 3, 2008 GRB080303
TITLE:   GCN CIRCULAR
NUMBER:  7351
SUBJECT: GRB 080303: Swift detection of a burst with optical afterglow
DATE:    08/03/03 09:41:42 GMT
FROM:    David Palmer at LANL  

T. Sakamoto (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), G. Cusumano (INAF-IASFPA),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
E. A. Hoversten (PSU), N. P. M. Kuin (MSSL), J. Mao (INAF-OAB),
A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester),
S. R. Oates (UCL-MSSL), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), P. Romano (INAF-IASFPA),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
G. Stratta (ASDC), G. Tagliaferri (INAF-OAB),
E. Troja (U Leicester/INAF-IASFPa) and H. Ziaeepour (UCL-MSSL) report
on behalf of the Swift Team:

At 09:10:35 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080303 (trigger=304549).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 112.073, -70.240 which is
   RA(J2000) = 07h 28m 18s
   Dec(J2000) = -70d 14' 23"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a FRED-like
structure with a duration of about 30 sec.  The peak count rate
was ~2600 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
February 29, 2008 GRB080229
TITLE:   GCN CIRCULAR
NUMBER:  7335
SUBJECT: GRB 080229: Swift detection of a bright burst
DATE:    08/02/29 17:31:15 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. K. Cannizzo (NASA/UMBC), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC),
P. A. Evans (U Leicester), O. Godet (U Leicester), C. Gronwall (PSU),
S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU),
S. Immler (CRESST/GSFC/UMD), J. A. Kennea (PSU),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
K. M. McLean (GSFC/UMD), A. Moretti (INAF-OAB),
P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),
C. Pagani (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL),
A. M. Parsons (GSFC), T. Sakamoto (NASA/UMBC), G. Sato (GSFC/ISAS),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), G. Stratta (ASDC) and
E. Troja (U Leicester/INAF-IASFPa) report on behalf of the Swift
Team:

At 17:04:59 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080229 (trigger=304379).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 228.217, -14.712 which is
   RA(J2000)  =  15h 12m 52s
   Dec(J2000) = -14d 42' 43"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed three or four bright
peaks with the brightest at ~T+40 sec with a duration of about 60 sec.
The peak count rate was ~7000 counts/sec (15-350 keV), at ~40 sec
after the trigger.
+ Read more
February 18, 2008 GRB080218b
TITLE:   GCN CIRCULAR
NUMBER:  7314
SUBJECT: GRB 080218B: Swift detection of a burst
DATE:    08/02/19 00:37:50 GMT
FROM:    David Palmer at LANL  

P. Schady (MSSL-UCL), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC),
P. A. Evans (U Leicester), S. T. Holland (CRESST/USRA/GSFC),
J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL),
T. Sakamoto (NASA/UMBC), G. Sato (GSFC/ISAS),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
D. E. Vanden Berk (PSU) and P. A. Ward (MSSL-UCL) report on behalf of
the Swift Team:

At 23:57:47 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080218B (trigger=303631).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 177.951, -53.100 which is
   RA(J2000) = 11h 51m 48s
   Dec(J2000) = -53d 06' 00"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a complex
structure with a duration of at least 12 sec, up to an
interruption in the available data caused by a TDRSS gap.
The peak count rate was  ~1300 counts/sec (15-350 keV),
at ~0 sec after the trigger.
+ Read more
February 18, 2008 GRB080218
TITLE:   GCN CIRCULAR
NUMBER:  7313
SUBJECT: GRB 080218: Swift detection of a burst
DATE:    08/02/18 20:18:57 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
W. B. Landsman (NASA/GSFC), K. M. McLean (GSFC/UMD), C. Pagani (PSU),
D. M. Palmer (LANL), T. Sakamoto (NASA/UMBC), G. Sato (GSFC/ISAS),
M. Stamatikos (NASA/ORAU), D. E. Vanden Berk (PSU), L. Vetere (PSU)
and P. A. Ward (MSSL-UCL) report on behalf of the Swift Team:

At 20:08:42 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080218 (trigger=303609).  Swift did not slew to the burst
location because of the Sun observing constraint (34 deg from the Sun).
The BAT on-board calculated location is
RA, Dec 355.922, +12.175 which is
   RA(J2000)  =  23h 43m 41s
   Dec(J2000) = +12d 10' 29"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a weak peak around T_0.
The peak count rate was ~400 counts/sec (15-350 keV).
+ Read more
February 12, 2008 GRB080212
TITLE:   GCN CIRCULAR
NUMBER:  7296
SUBJECT: GRB 080212: Swift detection of a burst
DATE:    08/02/12 17:58:30 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
P. J. Brown (PSU), D. N. Burrows (PSU), M. M. Chester (PSU),
J. R. Cummings (NASA/UMBC), G. Cusumano (INAF-IASFPA),
M. De Pasquale (UCL-MSSL), O. Godet (U Leicester),
C. Guidorzi (INAF-OAB), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA),
V. Mangano (INAF-IASFPA), J. Mao (INAF-OAB),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), P. Romano (INAF-IASFPA),
T. Sakamoto (NASA/UMBC), G. Sato (GSFC/ISAS),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB),
E. Troja (U Leicester/INAF-IASFPa), D. E. Vanden Berk (PSU) and
L. Vetere (PSU) report on behalf of the Swift Team:

At 17:34:33 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080212 (trigger=303105).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 231.107, -22.752 which is
   RA(J2000) = 15h 24m 26s
   Dec(J2000) = -22d 45' 06"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a single peak
with a duration of about 20 sec.  The peak count rate was ~1000
counts/sec (15-350 keV), at ~0 sec after the trigger.  There may be a
precursor at T-60 sec.
+ Read more
February 10, 2008 GRB080210
TITLE:   GCN CIRCULAR
NUMBER:  7281
SUBJECT: GRB 080210: Swift detection of a burst with optical afterglow
DATE:    08/02/10 08:27:08 GMT
FROM:    David Palmer at LANL  

D. Grupe (PSU), W. H. Baumgartner (GSFC/UMBC), M. M. Chester (PSU),
N. Gehrels (NASA/GSFC), E. A. Hoversten (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL),
A. M. Parsons (GSFC), M. Stamatikos (NASA/ORAU) and M. C. Stroh (PSU)
report on behalf of the Swift Team:

At 07:50:05 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080210 (trigger=302888).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 251.270, +13.830 which is
   RA(J2000) = 16h 45m 05s
   Dec(J2000) = +13d 49' 49"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a single-peak
with substructure with a duration of about 35 sec.  The peak count rate
was ~2000 counts/sec (15-350 keV), at ~10 sec after the trigger.  This
was an image trigger, but with a clear light curve.
+ Read more
February 7, 2008 GRB080207
TITLE:   GCN CIRCULAR
NUMBER:  7264
SUBJECT: GRB 080207: Swift detection of a burst
DATE:    08/02/07 21:48:14 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. L. Racusin (PSU), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), P. J. Brown (PSU),
D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC),
P. A. Evans (U Leicester), S. D. Hunsberger (PSU),
J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), T. Sakamoto (NASA/UMBC),
R. L. C. Starling (U Leicester), M. C. Stroh (PSU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 21:30:21 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080207 (trigger=302728).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 207.513, +7.514 which is
   RA(J2000)  = 13h 50m 03s
   Dec(J2000) = +07d 30' 50"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  This was an image-trigger, so the TDRSS
lightcurve show little activity.
+ Read more
February 5, 2008 GRB080205
TITLE:   GCN CIRCULAR
NUMBER:  7250
SUBJECT: GRB 080205: Swift detection of a burst
DATE:    08/02/05 08:21:36 GMT
FROM:    David Palmer at LANL  

C. B. Markwardt (CRESST/GSFC/UMD), M. M. Chester (PSU),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
A. D. Falcone (PSU), N. Gehrels (NASA/GSFC), C. Guidorzi (INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), S. D. Hunsberger (PSU),
J. A. Kennea (PSU), C. Pagani (PSU), K. L. Page (U Leicester),
D. M. Palmer (LANL), D. Perez (U Leicester), J. L. Racusin (PSU),
T. Sakamoto (NASA/UMBC), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), T. N. Ukwatta (GSFC/GWU) and
L. Vetere (PSU) report on behalf of the Swift Team:

At 07:55:51 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080205 (trigger=302506).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 98.219, +62.769 which is
   RA(J2000) = 06h 32m 53s
   Dec(J2000) = +62d 46' 07"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows three roughly
equal-height peaks spanning approximately 120 seconds.  The peak
count rate was ~1000 counts/sec (15-350 keV), at ~0 sec, ~70 sec,
and ~95 sec after the trigger.
+ Read more
January 29, 2008 GRB080129
TITLE:   GCN CIRCULAR
NUMBER:  7226
SUBJECT: GRB 080129 (?): Swift detection of a possible burst
DATE:    08/01/29 06:31:10 GMT
FROM:    Stefan Immler at NASA/GSFC  

S. Immler (CRESST/GSFC/UMD), D. N. Burrows (PSU), M. M. Chester (PSU),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC),
E. A. Hoversten (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL),
D. Perez (U Leicester), M. Perri (ASDC), M. Stamatikos (NASA/ORAU) and
G. Stratta (ASDC) report on behalf of the Swift Team:

At 06:06:45 UT, the Swift Burst Alert Telescope (BAT) triggered and
located a possible GRB 080129 (trigger=301981). The BAT on-board calculated
location is RA, Dec 105.280, -7.827 which is
   RA(J2000) = 07h 01m 07s
   Dec(J2000) = -07d 49' 35"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve for this event appears
to show a duration of about 80 sec with a peak of ~600 counts/sec
(15-350 keV), at ~30 sec after the trigger although, as is usual
for image triggers, the TDRSS light curve is noisy.
The location of the source, 1.4 degrees from the Galactic plane
raises the possibility that this is a Galactic transient.
Further analysis will require the downlinked data from Malindi.
+ Read more
January 23, 2008 GRB080123
TITLE:   GCN CIRCULAR
NUMBER:  7203
SUBJECT: GRB 080123: Swift detection of a short burst
DATE:    08/01/23 04:43:57 GMT
FROM:    Jamie A. Kennea at PSU/Swift-XRT  

T. N. Ukwatta (GSFC/GWU), W. H. Baumgartner (GSFC/UMBC),
M. M. Chester (PSU), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU),
S. Immler (CRESST/GSFC/UMD), J. A. Kennea (PSU),
V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC),
D. M. Palmer (LANL), T. Sakamoto (NASA/UMBC),
B. Sbarufatti (INAF-IASFPA) and D. E. Vanden Berk (PSU) report on
behalf of the Swift Team:

At 04:21:57 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 080123 (trigger=301578).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 338.929, -64.890 which is
  RA(J2000) = 22h 35m 43s
  Dec(J2000) = -64d 53' 23"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with a duration of about 0.5 sec.  The peak count rate
was ~6000 counts/sec (15-350 keV), at ~0.1 sec after the trigger.
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January 21, 2008 GRB080121
TITLE:   GCN CIRCULAR
NUMBER:  7209
SUBJECT: GRB 080121: Swift-BAT detection of a very weak, short burst
DATE:    08/01/23 20:39:09 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. R. Cummings and D. M. Palmer for the Swift-BAT team

At 21:29:55 on Jan 21, 2008, BAT detected a weak short GRB
(trigger #301491) at a ground-calculated location
RA, Dec 137.235, +41.841, error radius 3 arcmin (90% confidence),
which is:
RA(J2000)  = 09h 08m 56s
Dec(J2000) = +41d 50' 29"

The significance of the source in the detection image was just
below the alert threshold, so Swift did not slew immediately to
the burst. In addition, the source location was in Moon constraint,
so no late observation was made.
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