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

Swift's Gamma Ray Bursts from 2007

December 27, 2007 GRB071227
TITLE:   GCN CIRCULAR
NUMBER:  7147
SUBJECT: GRB 071227: Swift detection of a burst
DATE:    07/12/27 20:36:40 GMT
FROM:    Takanori Sakamoto at NASA/GSFC  

T. Sakamoto (NASA/UMBC), W. H. Baumgartner (GSFC/UMBC),
A. P. Beardmore (U Leicester), M. M. Chester (PSU),
S. D. Hunsberger (PSU), K. L. Page (U Leicester),
J. L. Racusin (PSU), P. Romano (Univ. Bicocca & INAF-OAB),
G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
E. Troja (INAF-IASFPA) and D. E. Vanden Berk (PSU) report on behalf
of the Swift Team:

At 20:13:47 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071227 (trigger=299787).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 58.120, -55.953 which is 
  RA(J2000) = 03h 52m 29s
  Dec(J2000) = -55d 57' 08"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed at least three 
spikes with a duration of about 5 sec.  The peak count rate
was ~4500 counts/sec (15-350 keV), at ~0.5 sec after the trigger. 
+ Read more
November 29, 2007 GRB071129
TITLE:   GCN CIRCULAR
NUMBER:  7138
SUBJECT: GRB 071129: Swift detection of a burst
DATE:    07/11/29 00:13:36 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. Pagani (PSU), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), F. E. Marshall (NASA/GSFC),
J. L. Racusin (PSU), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU),
T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the
Swift Team:

At 00:03:55 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071129 (trigger=297628).  Swift did not slew to this burst
because of the Sun observing constraint (23deg is less than 45 deg). 
The BAT on-board calculated location is 
RA, Dec 220.090, -26.659, which is 
   RA(J2000)  =  14h 40m 22s
   Dec(J2000) = -26d 39' 31"
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 30 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~5 sec after the trigger. 
+ Read more
November 22, 2007 GRB071122
TITLE:   GCN CIRCULAR
NUMBER:  7121
SUBJECT: GRB 071122: Swift detection of a burst
DATE:    07/11/22 01:45:10 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

M. Stamatikos (NASA/ORAU), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), P. J. Brown (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 (GSFC/UMCP),
J. A. Kennea (PSU), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 01:23:25 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071122 (trigger=297114).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 276.581, +47.063 which is 
   RA(J2000)  =  18h 26m 20s
   Dec(J2000) = +47d 03' 47"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  As is typical with image triggers, there is
nothing obvious in the TDRSS lightcurve.  In these cases, the bursts often
have long duration. 
+ Read more
November 18, 2007 GRB071118
TITLE:   GCN CIRCULAR
NUMBER:  7106
SUBJECT: GRB 071118: Swift detection of a burst
DATE:    07/11/18 09:29:11 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. R. Cummings (NASA/UMBC), G. Cusumano (INAF-IASFPA),
N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), C. B. Markwardt (CRESST/GSFC/UMD),
A. Moretti (INAF-OAB), D. M. Palmer (LANL),
G. Tagliaferri (INAF-OAB), T. N. Ukwatta (GSFC/GWU) and
D. E. Vanden Berk (PSU) report on behalf of the Swift Team:

At 08:57:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071118 (trigger=296856).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 299.817, +70.093 which is 
   RA(J2000) = 19h 59m 16s
   Dec(J2000) = +70d 05' 34"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  As is usual for image triggers, there is
no obvious variation in the TDRSS light curve. 
+ Read more
November 17, 2007 GRB071117
TITLE:   GCN CIRCULAR
NUMBER:  7098
SUBJECT: GRB 071117: Swift detection of a bright burst
DATE:    07/11/17 15:02:30 GMT
FROM:    David Palmer at LANL  

T. N. Ukwatta (GSFC/GWU), W. H. Baumgartner (GSFC/UMBC),
D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC),
G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC),
C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB) and D. E. Vanden Berk (PSU)
report on behalf of the Swift Team:

At 14:50:06 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071117 (trigger=296805).  Swift did not slew immediately 
to the burst due to an Earth constraint.  The BAT on-board calculated 
location is RA, Dec 335.020, -63.441 which is 
   RA(J2000) = 22h 20m 05s
   Dec(J2000) = -63d 26' 27"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single FRED
peak with a duration of about 5 sec.  The peak count rate
was ~16000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
November 12, 2007 GRB071112c
TITLE:   GCN CIRCULAR
NUMBER:  7059
SUBJECT: GRB 071112C: Swift detection of a burst with an optical counterpart
DATE:    07/11/12 18:50:05 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

M. Perri (ASDC), G. Stratta (ASDC), S. D. Barthelmy (GSFC),
P. J. Brown (PSU), J. R. Cummings (NASA/UMBC),
G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), C. Pagani (PSU), D. M. Palmer (LANL),
A. M. Parsons (GSFC), J. L. Racusin (PSU),
P. Romano (Univ. Bicocca & INAF-OAB),
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 18:32:57 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071112C (trigger=296504).  Swift slewed immediately to this burst. 
The BAT on-board calculated location is 
RA, Dec 39.220, +28.381 which is 
   RA(J2000)  =  02h 36m 53s
   Dec(J2000) = +28d 22' 50"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  We do not know anything about the lightcurve
from this "C" burst, because it came so closely after the
previous ("B") burst that the on-board script was still running. 
+ Read more
November 12, 2007 GRB071112b
TITLE:   GCN CIRCULAR
NUMBER:  7058
SUBJECT: GRB 071112B: Swift detection of a short hard burst
DATE:    07/11/12 18:34:08 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

M. Perri (ASDC), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), S. Mateos (U Leicester),
D. M. Palmer (LANL), A. M. Parsons (GSFC),
P. Romano (Univ. Bicocca & INAF-OAB),
R. L. C. Starling (U Leicester), G. Stratta (ASDC),
T. N. Ukwatta (GSFC/GWU), D. E. Vanden Berk (PSU) and
S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team:

At 18:23:31 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071112B (trigger=296503).  Swift did not slew because
of the Earth observing constraint.  Swift will slew at T+33 min. 
The BAT on-board calculated location is 
RA, Dec 260.305, -80.884 which is 
   RA(J2000)  =  17h 21m 13s
   Dec(J2000) = -80d 53' 02"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a double spike
structure with a duration of about 1 sec.  The peak count rate
was ~4500 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
November 1, 2007 GRB071101
TITLE:   GCN CIRCULAR
NUMBER:  7030
SUBJECT: GRB 071101: Swift detection of a burst
DATE:    07/11/01 18:14:24 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. McBreen (MPE), S. D. Barthelmy (GSFC), 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 (GSFC/USRA), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC),
P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/UMBC),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU),
D. E. Vanden Berk (PSU) and S. D. Vergani (DIAS-DCU) report on behalf
of the Swift Team:

At 17:53:46 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071101 (trigger=295779).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 48.194, +62.473 which is 
   RA(J2000)  =  03h 12m 46s
   Dec(J2000) = +62d 28' 24"
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 3 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger. 
+ Read more
October 31, 2007 GRB071031
TITLE:   GCN CIRCULAR
NUMBER:  7020
SUBJECT: GRB 071031: Swift detection of a burst with an optical counterpart
DATE:    07/10/31 01:24:38 GMT
FROM:    David Palmer at LANL  

M. C. Stroh (PSU), C. Gronwall (PSU), D. Grupe (PSU),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), C. Pagani (PSU), 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 01:06:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071031 (trigger=295670).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 6.458, -58.045 which is 
   RA(J2000) = 00h 25m 50s
   Dec(J2000) = -58d 02' 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 30 sec.  The peak count rate
was ~600 counts/sec (15-350 keV), at ~3 sec after the trigger. 
+ Read more
October 28, 2007 GRB071028b
TITLE:   GCN CIRCULAR
NUMBER:  7019
SUBJECT: GRB 071028B Swift-BAT detection of a burst
DATE:    07/10/30 13:19:51 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. R. Cummings (CRESST/NASA/GSFC) and J. Greiner (MPE) for the Swift team

At 02:43:46 UT on October 28, the Swift Burst Alert Telescope (BAT)
triggered on GRB 071028B (trigger #295492). The burst was on the edge
of the field of view (4.1% coded) and no source was found automatically
onboard. A source was found during later ground analysis at a location
RA, Dec 354.163, -31.630 which is
   RA(J2000)  =  23h 36m 39s
   Dec(J2000) = -31d 37' 47"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows two FRED peaks,
the first at T+1 sec about 4 seconds long, the second at T+48 sec about
9 seconds long. The peak count rate was about 1500 counts/sec
(15-350 keV), at ~1 sec after the trigger.
+ Read more
October 28, 2007 GRB071028
TITLE:   GCN CIRCULAR
NUMBER:  7012
SUBJECT: GRB 071028: Swift detection of a burst
DATE:    07/10/28 18:00:32 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. L. Racusin (PSU), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), G. Cusumano (INAF-IASFPA),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), C. Pagani (PSU), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), 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 17:41:01 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071028 (trigger=295527).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 119.847, +21.498 which is 
   RA(J2000)  =  07h 59m 23s
   Dec(J2000) = +21d 29' 52"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  Even though this is an image trigger, there is
an indication of activity from about T+20 sec to T+50 sec. 
The peak count rate was ~400 counts/sec (15-350 keV), at ~25 sec
after the trigger. 
+ Read more
October 25, 2007 GRB071025
TITLE:   GCN CIRCULAR
NUMBER:  6986
SUBJECT: GRB 071025: Swift detection of a burst
DATE:    07/10/25 04:30:05 GMT
FROM:    Claudio Pagani at PSU/Swift-XRT  

C. Pagani (PSU), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU),
J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC),
C. Gronwall (PSU), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), J. L. Racusin (PSU),
T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the
Swift Team:

At 04:08:54 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071025 (trigger=295301).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 355.084, +31.757 which is 
   RA(J2000)  =  23h 40m 20s
   Dec(J2000) = +31d 45' 24"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  Although this is a 64 sec image trigger, 
the light curve appears to have a single broad peak with duration 
about 120 sec near time T+100, with peak count rate 2000 ct/s. 
+ Read more
October 21, 2007 GRB071021
TITLE:   GCN CIRCULAR
NUMBER:  6958
SUBJECT: GRB 071021: Swift detection of a burst
DATE:    07/10/21 09:56:46 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

T. Sakamoto (NASA/UMBC), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB),
C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB) and
S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team:

At 09:41:33 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071021 (trigger=294974).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 340.636, +23.707 which is 
   RA(J2000)  =  22h 42m 33s
   Dec(J2000) = +23d 42' 24"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  As with most 64 second image triggers,
there is no obvious variation in the count rate light curve.
+ Read more
October 20, 2007 GRB071020
TITLE:   GCN CIRCULAR
NUMBER:  6949
SUBJECT: GRB 071020: Swift detection of a bright burst
DATE:    07/10/20 07:18:57 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. T. Holland (CRESST/USRA/GSFC), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. Guidorzi (Univ Bicocca&INAF-OAB), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC),
T. Sakamoto (NASA/UMBC), R. L. C. Starling (U Leicester) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 07:02:26 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071020 (trigger=294835).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 119.664, +32.861 which is 
   RA(J2000)  =  07h 58m 39s
   Dec(J2000) = +32d 51' 40"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a double peak
structure with a duration of about 5 sec.  The peak count rate
was ~22000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
October 18, 2007 GRB071018
TITLE:   GCN CIRCULAR
NUMBER:  6932
SUBJECT: GRB 071018?: Swift detection of a possible burst
DATE:    07/10/18 09:04:33 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC),
P. T. O'Brien (U Leicester), D. M. Palmer (LANL) and
B. Sbarufatti (INAF-IASFPA) report on behalf of the Swift Team:

At 08:37:41 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071018(?) (trigger=294645). 
The BAT on-board calculated location is 
RA, Dec 164.676, +53.830 which is 
   RA(J2000)  =  10h 58m 42s
   Dec(J2000) = +53d 49' 49"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  This was a 320-sec long image trigger, so the
TDRSS lightcurve does not show any significant signal (as is typical). 
This location is well off the Galactic plane and does not mach any known
sources in SIMBAD.  Given that it is a long image trigger, this was
automatically classifed as a transient instead of a GRB.  We will need
the full data set to determine if this is a burst or transient. 
+ Read more
October 13, 2007 GRB071013
TITLE:   GCN CIRCULAR
NUMBER:  6907
SUBJECT: GRB 071013: Swift detection of a burst
DATE:    07/10/13 12:49:52 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

F. E. Marshall (NASA/GSFC), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU),
G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC),
J. A. Kennea (PSU), V. La Parola (INAF-IASFPA),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
P. T. O'Brien (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB),
G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA),
T. N. Ukwatta (GSFC/GWU) and H. Ziaeepour (UCL-MSSL) report on behalf
of the Swift Team:

At 12:09:19 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071013 (trigger=294120).  Swift did not execute an immediate slew. 
The BAT on-board calculated location is
RA, Dec 279.525, +33.857 which is
   RA(J2000)  =  18h 38m 06s
   Dec(J2000) = +33d 51' 27"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a peak ~40 sec duration. 
The peak count rate was ~800 counts/sec (15-350 keV), at ~2 sec after the trigger.
+ Read more
October 11, 2007 GRB071011
TITLE:   GCN CIRCULAR
NUMBER:  6882
SUBJECT: GRB 071011: Swift detection of a burst
DATE:    07/10/11 12:51:21 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), O. Godet (U Leicester),
S. T. Holland (CRESST/USRA/GSFC), V. Mangano (INAF-IASFPA),
C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU), E. Troja (INAF-IASFPA) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 12:40:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071011 (trigger=293924).  Swift did not execute an immediate slew
because of an Earth-observing constraint, but it will at ~T+2700 sec. 
The BAT on-board calculated location is 
RA, Dec 8.400, +61.072 which is 
   RA(J2000)  =  00h 33m 36s
   Dec(J2000) = +61d 04' 21"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows two peaks each of
~10 sec duration.  The second peak is at ~T+48 sec. 
The peak count rate was ~1800 counts/sec (15-350 keV), at ~1 sec
after the trigger. 
+ Read more
October 10, 2007 GRB071010c
TITLE:   GCN CIRCULAR
NUMBER:  6906
SUBJECT: GRB 071010C Swift-BAT detection of a burst
DATE:    07/10/13 02:59:07 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. R. Cummings (CRESST/NASA/GSFC) for the Swift-BAT team

At 22:20:22 UT on October 10, the Swift Burst Alert Telescope (BAT)
triggered on GRB 071010C (trigger #293804). The burst was on the edge 
of the field of view (3.5% coded) and no source was found automatically 
onboard. A source was found during later ground analysis at a location 
RA, Dec 338.054, +66.159 which is
   RA(J2000)  =  22h 32m 13s
   Dec(J2000) = +66d 09' 32"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows a single 
slow-rise slow-decay peak about 12 seconds long. The peak count 
rate was about 1000 counts/sec (15-350 keV), at ~1 sec after the trigger.
+ Read more
October 10, 2007 GRB071010b
TITLE:   GCN CIRCULAR
NUMBER:  6871
SUBJECT: GRB 071010B: Swift detection of a burst
DATE:    07/10/10 21:09:02 GMT
FROM:    Craig Markwardt at NASA/GSFC/UMD  

C. B. Markwardt (CRESST/GSFC/UMD), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), 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 (Univ. Bicocca & INAF-OAB),
T. Sakamoto (NASA/UMBC), B. Sbarufatti (INAF-IASFPA) and
G. Stratta (ASDC) report on behalf of the Swift Team:

At 20:45:47 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071010B (trigger=293795). 
The BAT on-board calculated location is 
RA, Dec 150.530, +45.731 which is 
   RA(J2000)  =  10h 02m 07s
   Dec(J2000) = +45d 43' 53"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a single FRED pulse
with a duration of about 20 sec.  The peak count rate
was ~12,000 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
October 10, 2007 GRB071010
TITLE:   GCN CIRCULAR
NUMBER:  6859
SUBJECT: GRB 071010: Swift detection of a burst
DATE:    07/10/10 03:56:03 GMT
FROM:    David Palmer at LANL  

A. Moretti (INAF-OAB), W. H. Baumgartner (GSFC/UMBC),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC),
D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 03:41:12 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071010 (trigger=293707). 
The BAT on-board calculated location is 
RA, Dec 288.101, -32.379 which is 
   RA(J2000) = 19h 12m 24s
   Dec(J2000) = -32d 22' 42"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a broad
structure with a duration of about 30 sec.  The peak count rate
was ~600 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
October 8, 2007 GRB071008
TITLE:   GCN CIRCULAR
NUMBER:  6856
SUBJECT: GRB 071008: Swift detection of a burst
DATE:    07/10/08 22:04:30 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. Moretti (INAF-OAB), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC),
V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC),
D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 21:55:56 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071008 (trigger=293587). 
The BAT on-board calculated location is 
RA, Dec 151.548, +44.334 which is 
   RA(J2000)  =  10h 06m 11s
   Dec(J2000) = +44d 20' 02"
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 ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger. 
+ Read more
October 6, 2007 GRB071006
TITLE:   GCN CIRCULAR
NUMBER:  6858
SUBJECT: GRB 071006 Swift-BAT detection of a burst
DATE:    07/10/10 02:18:52 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. R. Cummings (CRESST/NASA/GSFC) for the Swift-BAT team

At 06:41:40 UT on October 6, the Swift Burst Alert Telescope (BAT)
triggered on GRB 071006. The burst began just before a preplanned
slew, and no source was found automatically onboard. A source was 
found during later ground analysis, at a location of 
RA, Dec 335.282, -23.154, which is
   RA(J2000)  =  22h 21m 07s
   Dec(J2000) = -23d 09' 14"
with an uncertainty of 2 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows two small peaks
on top of a gradual rise to a large peak at T+32 sec. The total
duration is about 80 sec. The spectrum appears to be of average
hardness for a long GRB.
+ Read more
October 3, 2007 GRB071003
TITLE:   GCN CIRCULAR
NUMBER:  6837
SUBJECT: GRB 071003: Swift detection of a bright burst
DATE:    07/10/03 07:53:48 GMT
FROM:    David Palmer at LANL  

P. Schady (MSSL-UCL), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL), G. Sato (GSFC/ISAS)
and R. L. C. Starling (U Leicester) report on behalf of the Swift
Team:

At 07:40:55 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071003 (trigger=292934). The BAT on-board calculated location is 
RA, Dec 301.856, +10.960 which is 
   RA(J2000) = 20h 07m 25s
   Dec(J2000) = +10d 57' 35"
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 25 sec.  The peak count rate
was ~16000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
October 1, 2007 GRB071001
TITLE:   GCN CIRCULAR
NUMBER:  6832
SUBJECT: GRB 071001: Swift detection of a burst
DATE:    07/10/01 16:54:59 GMT
FROM:    David Palmer at LANL  

M. De Pasquale (UCL-MSSL), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), S. Campana (INAF-OAB),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/USRA/GSFC), H. A. Krimm (GSFC/USRA),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), A. Moretti (INAF-OAB), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL), J. L. Racusin (PSU),
G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA),
T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the
Swift Team:

At 16:31:48 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 071001 (trigger=292826).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 149.766, -59.751 which is 
   RA(J2000) = 09h 59m 04s
   Dec(J2000) = -59d 45' 02"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows two isolated peaks
spanning a duration of about 50 sec.  The peak count rate
was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
September 23, 2007 GRB070923
TITLE:   GCN CIRCULAR
NUMBER:  6818
SUBJECT: GRB 070923: Swift detection of a short hard burst
DATE:    07/09/23 19:26:48 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

M. C. Stroh (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
N. Gehrels (NASA/GSFC), D. Grupe (PSU), H. A. Krimm (GSFC/USRA),
D. M. Palmer (LANL), A. M. Parsons (GSFC), J. L. Racusin (PSU),
R. L. C. Starling (U Leicester) and T. N. Ukwatta (GSFC/GWU) report
on behalf of the Swift Team:

At 19:15:23 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070923 (trigger=292004). 
The BAT on-board calculated location is 
RA, Dec 184.626, -38.268 which is 
   RA(J2000)  =  12h 18m 30s
   Dec(J2000) = -38d 16' 03"
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 100 msec.  The peak count rate
was ~8000 counts/sec (15-350 keV), at ~0.0 sec after the trigger. 
+ Read more
September 20, 2007 GRB070920b
TITLE:   GCN CIRCULAR
NUMBER:  6808
SUBJECT: GRB 070920B: Swift detection of a burst
DATE:    07/09/20 21:13:46 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. L. Racusin (PSU), S. D. Barthelmy (GSFC),
J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/GSFC/USRA), H. A. Krimm (GSFC/USRA),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
C. Pagani (PSU), 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 21:04:32 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070920B (trigger=291728). 
The BAT on-board calculated location is 
RA, Dec 0.144, -34.819 which is 
   RA(J2000)  = 00h 00m 35s
   Dec(J2000) = -34d 49' 06"
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 35 sec.  The peak count rate
was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
September 20, 2007 GRB070920
TITLE:   GCN CIRCULAR
NUMBER:  6805
SUBJECT: GRB 070920: Swift detection of a burst
DATE:    07/09/20 04:19:07 GMT
FROM:    David Palmer at LANL  

D. Grupe (PSU), N. Gehrels (NASA/GSFC), F. E. Marshall (NASA/GSFC),
C. Pagani (PSU), D. M. Palmer (LANL), J. L. Racusin (PSU),
G. Sato (GSFC/ISAS), 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 04:00:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070920 (trigger=291614). 
The BAT on-board calculated location is 
RA, Dec 100.932, +72.227 which is 
   RA(J2000) = 06h 43m 44s
   Dec(J2000) = +72d 13' 38"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  As is often the case with 64-second
image triggers, the BAT light curve shows no obvious
variation in the count rate. 
+ Read more
September 17, 2007 GRB070917
TITLE:   GCN CIRCULAR
NUMBER:  6791
SUBJECT: GRB 070917: Swift detection of a bright burst
DATE:    07/09/17 07:48:46 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. R. Cummings (NASA/UMBC), A. P. Beardmore (U Leicester),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
T. Sakamoto (NASA/ORAU) and M. Stamatikos (NASA/ORAU) report on
behalf of the Swift Team:

At 07:33:56 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070917 (trigger=291292). 
The BAT on-board calculated location is RA, Dec 293.925, +2.413 which is 
   RA(J2000) = 19h 35m 42s
   Dec(J2000) = +02d 24' 47"
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 5 sec.  The peak count rate
was ~22000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
September 13, 2007 GRB070913
TITLE:   GCN CIRCULAR
NUMBER:  6782
SUBJECT: GRB 070913: Swift detection of a burst
DATE:    07/09/13 00:46:08 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. B. Markwardt (CRESST/GSFC/UMD), S. D. Barthelmy (GSFC),
J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA),
K. L. Page (U Leicester), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on
behalf of the Swift Team:

At 00:36:43 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070913 (trigger=290843). 
The BAT on-board calculated location is RA, Dec 228.832, -24.342,
which is:
   RA(J2000)  = 15h 15m 20s
   Dec(J2000) = -24d 20' 30"
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 ~1000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
September 11, 2007 GRB070911
TITLE:   GCN CIRCULAR
NUMBER:  6777
SUBJECT: GRB 070911: Swift detection of a burst
DATE:    07/09/11 06:20:20 GMT
FROM:    David Palmer at LANL  

H. A. Krimm (GSFC/USRA), C. B. Markwardt (CRESST/GSFC/UMD),
K. L. Page (U Leicester), D. M. Palmer (LANL) and
M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team:

At 05:57:44 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070911 (trigger=290624).  Swift automatic slews are
currently disabled, as we are currently recovering from a safehold. 
The BAT on-board calculated location is 
RA, Dec 25.799, -33.473 which is 
   RA(J2000) = 01h 43m 12s
   Dec(J2000) = -33d 28' 21"
with an uncertainty of 4 arcmin (radius, 90% containment, including 
systematic uncertainty, however there is an uncalibrated boresight
shift due to operations with a different set of gyros than we have
used previously).  The BAT light curve showed a complex multi-peaked
structure with a duration of about 150 sec.  The peak count rate
was ~8000 counts/sec (15-350 keV), at ~36 sec after the trigger. 
+ Read more
August 10, 2007 GRB070810b
TITLE:   GCN CIRCULAR
NUMBER:  6743
SUBJECT: GRB 070810B: Swift detection of a short burst
DATE:    07/08/10 15:52:16 GMT
FROM:    David Palmer at LANL  

F. E. Marshall (NASA/GSFC), P. J. Brown (PSU),
J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC),
O. Godet (U Leicester), C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
J. P. Osborne (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU) and
D. E. Vanden Berk (PSU) report on behalf of the Swift Team:

At 15:19:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070810B (trigger=287409).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 8.940, +8.835 which is 
   RA(J2000) = 00h 35m 46s
   Dec(J2000) = +08d 50' 07"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single short spike
with a duration of < 0.2 sec.  The peak count rate
was ~4500 counts/sec (15-350 keV), at ~0 sec after the trigger.  The
lightcurves in different bands indicate an intermediate spectrum that is 
neither hard nor soft. 
+ Read more
August 10, 2007 GRB070810
TITLE:   GCN CIRCULAR
NUMBER:  6733
SUBJECT: GRB 070810: Swift detection of a burst
DATE:    07/08/10 02:53:00 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

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

At 02:11:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070810 (trigger=287364).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 189.939, +10.744 which is 
   RA(J2000)  =  12h 39m 45s
   Dec(J2000) = +10d 44' 40"
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 20 sec.  The peak count rate
was ~2500 counts/sec (15-350 keV), at T+0 sec after the trigger. 
+ Read more
August 9, 2007 GRB070809
TITLE:   GCN CIRCULAR
NUMBER:  6728
SUBJECT: GRB 070809: Swift detection of a short burst
DATE:    07/08/09 19:48:41 GMT
FROM:    David Palmer at LANL  

F. E. Marshall (NASA/GSFC), D. N. Burrows (PSU), M. M. Chester (PSU),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU),
G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU) and R. L. C. Starling (U Leicester) report
on behalf of the Swift Team:

At 19:22:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070809 (trigger=287344).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 203.782, -22.134 which is 
   RA(J2000) = 13h 35m 08s
   Dec(J2000) = -22d 08' 01"
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 2 sec.  The peak count rate
was ~2500 counts/sec (15-350 keV), at ~0 sec after the trigger. 
It is currently unclear from the spectral data if this is a short 
hard burst. 
+ Read more
August 8, 2007 GRB070808
TITLE:   GCN CIRCULAR
NUMBER:  6718
SUBJECT: GRB 070808: Swift detection of a burst
DATE:    07/08/08 18:50:12 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. R. Cummings (NASA/UMBC), S. D. Barthelmy (GSFC),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB),
G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA),
T. N. Ukwatta (GSFC/GWU) and D. E. Vanden Berk (PSU) report on behalf
of the Swift Team:

At 18:28:00 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070808 (trigger=287260).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 6.766, +1.166 which is 
   RA(J2000)  =  00h 27m 04s
   Dec(J2000) = +01d 09' 59"
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 10 sec.  The peak count rate
was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger. 
+ Read more
August 5, 2007 GRB070805
TITLE:   GCN CIRCULAR
NUMBER:  6708
SUBJECT: GRB 070805: Swift detection of a burst
DATE:    07/08/05 20:08:02 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. M. Parsons (GSFC), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC),
J. A. Kennea (PSU), V. La Parola (INAF-IASFPA),
C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
E. Troja (INAF-IASFPA), T. N. Ukwatta (GSFC/GWU),
D. E. Vanden Berk (PSU), S. D. Vergani (DIAS-DCU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 19:55:45 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070805 (trigger=287088). 
The BAT on-board calculated location is 
RA, Dec 245.043, -59.945 which is 
   RA(J2000)  =  16h 20m 10s
   Dec(J2000) = -59d 56' 40"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows two peaks, the first
is ~5 sec in duration and the second peak is broader and weaker
ending around T+40 sec.  The peak count rate
was ~500 counts/sec (15-350 keV), at ~2 sec after the trigger. 
+ Read more
August 2, 2007 GRB070802
TITLE:   GCN CIRCULAR
NUMBER:  6692
SUBJECT: GRB 070802: Swift detection of a burst
DATE:    07/08/02 07:46:54 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. D. Barthelmy (GSFC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), S. Immler (GSFC/UMCP),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
G. Tagliaferri (INAF-OAB), D. E. Vanden Berk (PSU) and
S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team:

At 07:07:25 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070802 (trigger=286809).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 36.851, -55.536 which is 
   RA(J2000)  =  02h 27m 24s
   Dec(J2000) = -55d 32' 10"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve shows a peak
with a duration of roughly 30 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~6 sec after the trigger. 
+ Read more
July 31, 2007 GRB070731
TITLE:   GCN CIRCULAR
NUMBER:  6691
SUBJECT: GRB 070731, Swift-BAT refined analysis
DATE:    07/07/31 14:00:59 GMT 
FROM:    Scott Barthelmy at NASA/GSFC  

J. Tueller (GSFC), L. Barbier (GSFC), S. D. Barthelmy (GSFC),
J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC),
H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL),
A. Parsons (GSFC), P. Romano (INAF/OAB), T. Sakamoto (GSFC/ORAU),
G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), T. Ukwatta (GWU)
(i.e. the Swift-BAT team):

Using the data set from T-240 to T+302 sec from the recent telemetry downlink,
we report analysis of BAT GRB 070731 (trigger #286574).  The spacecraft
did not slew to the location because of a Moon constraint.  It will come out
of Moon constraint 02 Aug 07 UT.  The BAT ground-calculated position is
RA, Dec = 328.581, -15.740 deg  which is  
   RA(J2000)  =  21h 54m 19.5s  
   Dec(J2000) = -15d 44' 23" 
with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 49%.
+ Read more
July 29, 2007 GRB070729
TITLE:   GCN CIRCULAR
NUMBER:  6678
SUBJECT: GRB 070729: Swift detection of a short hard burst
DATE:    07/07/29 00:48:05 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. Guidorzi (Univ Bicocca&INAF-OAB), L. M. Barbier (NASA/GSFC),
S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), A. Moretti (INAF-OAB),
D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 00:25:53 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070729 (trigger=286373).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 56.322, -39.312 which is
   RA(J2000)  =  03h 45m 17s
   Dec(J2000) = -39d 18' 41"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows three overlapping
peaks with a total duration of about 1.5 sec.  The peak count rate
was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
July 24, 2007 GRB070724
TITLE:   GCN CIRCULAR
NUMBER:  6654
SUBJECT: GRB 070724: Swift detection of a burst
DATE:    07/07/24 11:22:00 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
M. De Pasquale (UCL-MSSL), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA),
H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), 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),
P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA),
P. Schady (MSSL-UCL), M. Stamatikos (NASA/ORAU) and
R. L. C. Starling (U Leicester) report on behalf of the Swift Team:

At 10:53:50 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070724 (trigger=285948). Swift slewed immediately to the
burst. The BAT on-board calculated location is RA, Dec 27.818,
-18.622 which is
  RA(J2000) = 01h 51m 16s
  Dec(J2000) = -18d 37' 17"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a strong spike
about one second long at T+0 sec. The peak count rate was ~2700
counts/sec (15-350 keV), at ~0 sec after the trigger. This could be a
short burst although the spectrum is not hard.
+ Read more
July 21, 2007 GRB070721b
TITLE:   GCN CIRCULAR
NUMBER:  6640
SUBJECT: GRB 070721B: Swift detection of a burst
DATE:    07/07/21 11:16:00 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
P. A. Evans (U Leicester), K. L. Page (U Leicester) and
P. Schady (MSSL-UCL) report on behalf of the Swift Team:

At 10:33:48 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070721B (trigger=285654).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 33.131, -2.184 (J2000) with an uncertainty of 3 arcmin
(radius, 90% containment, including systematic uncertainty).
Like the previous trigger, there continues be a problem with the messages,
so we are not able to say anything about the lightcurve at this time.
+ Read more
.
July 21, 2007 GRB070721a
TITLE:   GCN CIRCULAR
NUMBER:  6639
SUBJECT: GRB 070721: Swift detection of a possible burst
DATE:    07/07/21 10:59:02 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
P. A. Evans (U Leicester), K. L. Page (U Leicester) and
E. Troja (INAF-IASFPA) report on behalf of the Swift Team:

At 10:01:08 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070721 (trigger=285653).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 3.176, -28.546 (J2000) with an uncertainty of 3 arcmin
(radius, 90% containment, including systematic uncertainty).
We have very little further information at this time (lightcurve, etc)
because there appears to be a problem with the messages.
+ Read more
July 14, 2007 GRB070714b
TITLE:   GCN CIRCULAR
NUMBER:  6620
SUBJECT: GRB 070714: Swift detection of a bright burst, possibly short
DATE:    07/07/14 05:28:15 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. L. Racusin (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
M. M. Chester (PSU), N. Gehrels (NASA/GSFC), H. A. Krimm (GSFC/USRA),
D. M. Palmer (LANL) and T. Sakamoto (NASA/ORAU) report on behalf of
the Swift Team:

At 04:59:29 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070714 (trigger=284856).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 57.854, +28.295 which is
   RA(J2000)  =  03h 51m 25s
   Dec(J2000) = +28d 17' 43"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a duration of
3 seconds with a spike to a peak of 20000 counts/s (15-350 keV)
at T+0.2 s.
+ Read more
July 14, 2007 GRB070714
TITLE:   GCN CIRCULAR
NUMBER:  6619
SUBJECT: Swift detection of a possible burst (Trigger 284850)
DATE:    07/07/14 04:20:07 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D. Grupe (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
M. M. Chester (PSU) and N. Gehrels (NASA/GSFC) report on behalf of
the Swift Team:

At approximately 03:18 +/-5min UT BAT triggered on a possible GRB
(trigger 284850).  Swift automatically slewed to the location
RA=43.94 Dec=+30.24 (J2000).  The uncertainty is 6 arcmin.
We are uncertain about both the time and the location at this time
because the trigger occurred during a TDRSS outage,
so most of the regular TDRSS Notices were lost.  We are also
in the middle of the computer downtime as announced earlier today,
so analysis of the full Malindi downlink data will have to wait until
late Saturday UT.
+ Read more
July 4, 2007 GRB070704
TITLE:   GCN CIRCULAR
NUMBER:  6594
SUBJECT: GRB 070704: Swift detection of a burst
DATE:    07/07/04 20:40:31 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

T. Sakamoto (NASA/ORAU), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), M. M. Chester (PSU),
N. Gehrels (NASA/GSFC), O. Godet (U Leicester),
S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/UMCP),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA)
and R. L. C. Starling (U Leicester) report on behalf of the Swift
Team:

At 20:05:57 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070704 (trigger=283791).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 354.723, +66.248 which is
   RA(J2000)  =  23h 38m 54s
   Dec(J2000) = +66d 14' 52"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve does not show anything
significant, as is typical for image-trigger events.  There is a possibility
that the burst started at ~T-70 sec, but since Swift was executing
a preplanned slew from ~T-35 to T_0 sec, it is difficult to interpret
the TDRSS lightcurve.
+ Read more
June 28, 2007 GRB070628
TITLE:   GCN CIRCULAR
NUMBER:  6584
SUBJECT: GRB 070628: Swift detection of a possible burst
DATE:    07/06/28 15:01:09 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. T. Holland (CRESST/GSFC/USRA), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), P. J. Brown (PSU),
D. N. Burrows (PSU), S. Campana (INAF-OAB), M. L. Conciatore (ASDC),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), V. La Parola (INAF-IASFPA),
V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), M. Perri (ASDC),
P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU),
G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 14:41:02 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070628 (trigger=283320).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 115.284, -20.285 which is
   RA(J2000)  =  07h 41m 08s
   Dec(J2000) = -20d 17' 04"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a single peak
on a rising background while entering the SAA with a duration of about 20 sec.
The peak count rate was ~3000 counts/sec (15-350 keV), at ~5 sec after the
trigger.  Given the galactic latitude of +1.25deg, we can not rule out
a Galactic transient origin of this trigger.
+ Read more
June 21, 2007 GRB070621
TITLE:   GCN CIRCULAR
NUMBER:  6560
SUBJECT: GRB 070621: Swift detection of a burst
DATE:    07/06/21 23:36:31 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

B. Sbarufatti (INAF-IASFPA), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), P. J. Brown (PSU),
M. M. Chester (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
C. Pagani (PSU), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 23:17:39 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070621 (trigger=282808).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 323.804, -24.806 which is
   RA(J2000)  =  21h 35m 13s
   Dec(J2000) = -24d 48' 20"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows multiple peaks
with a total duration of at least 40 sec.  The peak count rate
was ~1500 counts/sec (15-350 keV), at ~8 sec after the trigger.
+ Read more
June 21, 2007 GRB070621
TITLE:   GCN CIRCULAR
NUMBER:  6560
SUBJECT: GRB 070621: Swift detection of a burst
DATE:    07/06/21 23:36:31 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

B. Sbarufatti (INAF-IASFPA), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), P. J. Brown (PSU),
M. M. Chester (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
C. Pagani (PSU), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 23:17:39 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070621 (trigger=282808).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 323.804, -24.806 which is
   RA(J2000)  =  21h 35m 13s
   Dec(J2000) = -24d 48' 20"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows multiple peaks
with a total duration of at least 40 sec.  The peak count rate
was ~1500 counts/sec (15-350 keV), at ~8 sec after the trigger.
+ Read more
June 16, 2007 GRB070616
TITLE:   GCN CIRCULAR
NUMBER:  6542
SUBJECT: GRB 070616: Swift detection of a burst
DATE:    07/06/16 17:02:59 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

R. L. C. Starling (U Leicester), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC),
C. Guidorzi (Univ Bicocca&INAF-OAB), J. A. Kennea (PSU),
C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC),
G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU),
D. E. Vanden Berk (PSU) and L. Vetere (PSU) report on behalf of the
Swift Team:

At 16:29:33 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070616 (trigger=282445).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 32.155, +56.948 which is
   RA(J2000)  =  02h 08m 37s
   Dec(J2000) = +56d 56' 53"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows nothing much
around T_zero (as is typical for image triggers).  We note that there
is bright and variable activity in the TDRSS lightcurve starting at T+100 sec
and lasting to 600 sec.  This may be long-term burst activity, although we can
not rule out a contribution from a bright galactic source such as Cyg X-1
coming into the FOV (due to the slew).  We will be able to separate this
ambiguity when we get the full Malindi data to construct a mask-weighted
lightcurve.
+ Read more
June 12, 2007 GRB070612b
TITLE:   GCN CIRCULAR
NUMBER:  6511
SUBJECT: GRB 070612B: Swift detection of a burst
DATE:    07/06/12 06:33:33 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D. Grupe (PSU), S. D. Barthelmy (GSFC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA),
J. A. Kennea (PSU), W. B. Landsman (NASA/GSFC),
C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL),
J. L. Racusin (PSU), P. Romano (Univ. Bicocca & INAF-OAB) and
M. C. Stroh (PSU) report on behalf of the Swift Team:

At 06:21:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070612B (trigger=282073).
The BAT on-board calculated location is
RA, Dec 261.713, -8.719 which is
   RA(J2000)  =  17h 26m 51s
   Dec(J2000) = -08d 43' 06"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showes a single peak
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
June 12, 2007 GRB070612
TITLE:   GCN CIRCULAR
NUMBER:  6509
SUBJECT: GRB 070612: Swift detection of a burst
DATE:    07/06/12 02:53:27 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D. Grupe (PSU), S. D. Barthelmy (GSFC), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
W. B. Landsman (NASA/GSFC), C. B. Markwardt (CRESST/GSFC/UMD),
F. E. Marshall (NASA/GSFC), D. C. Morris (PSU), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU) and T. N. Ukwatta (GSFC/GWU) report on
behalf of the Swift Team:

At 02:38:45 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070612 (trigger=282066).
The BAT on-board calculated location is
RA, Dec 121.385, +37.266  which is
   RA(J2000)  =  08h 05m 32s
   Dec(J2000) = +37d 15' 56"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a single hard-
spectrum FRED peak with a duration of about 30 sec.  The peak count
rate was ~1100 counts/sec (15-350 keV), at ~-1 sec after the trigger.
+ Read more
June 11, 2007 GRB070611
TITLE:   GCN CIRCULAR
NUMBER:  6494
SUBJECT: GRB 070611: Swift detection of a burst
DATE:    07/06/11 02:08:47 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

M. C. Stroh (PSU), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), D. Grupe (PSU),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
W. B. Landsman (NASA/GSFC), C. B. Markwardt (GSFC/UMD),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL),
A. M. Parsons (GSFC), M. Stamatikos (NASA/ORAU) and
T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:

At 01:57:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070611 (trigger=282003).
The BAT on-board calculated location is
RA, Dec 1.987, -29.755 which is
   RA(J2000)  =  00h 07m 57s
   Dec(J2000) = -29d 45' 18"
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 10 sec.  The peak count rate
was ~800 counts/sec (15-350 keV), at ~2 sec after the trigger.
+ Read more
June 10, 2007 GRB070610
TITLE:   GCN CIRCULAR
NUMBER:  6489
SUBJECT: GRB 070610: Swift detection of a burst
DATE:    07/06/10 21:03:23 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. Pagani (PSU), S. D. Barthelmy (GSFC), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), D. Grupe (PSU),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), D. M. Palmer (LANL),
A. M. Parsons (GSFC), M. Stamatikos (NASA/ORAU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 20:52:26 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070610 (trigger=281993).
The BAT on-board calculated location is
RA, Dec 298.795, +26.214  which is
   RA(J2000)  =  19h 55m 11s
   Dec(J2000) = +26d 12' 49"
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 10 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~3 sec after the trigger.
+ Read more
May 31, 2007 GRB070531
TITLE:   GCN CIRCULAR
NUMBER:  6475
SUBJECT: GRB 070531: Swift detection of a burst
DATE:    07/05/31 02:30:45 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. B. Markwardt (GSFC/UMD), L. M. Barbier (NASA/GSFC),
S. D. Barthelmy (GSFC), M. M. Chester (PSU), N. Gehrels (NASA/GSFC),
S. D. Hunsberger (PSU), F. E. Marshall (NASA/GSFC),
K. L. Page (U Leicester), D. M. Palmer (LANL) and
M. Stamatikos (NASA/ORAU) report on behalf of the Swift Team:

At 02:10:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070531 (trigger=280958).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 6.678, +74.304 which is
   RA(J2000)  =  00h 26m 43s
   Dec(J2000) = +74d 18' 14"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a single FRED-like peak
with a duration of about 20 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~2 sec after the trigger.
+ Read more
May 29, 2007 GRB070529
TITLE:   GCN CIRCULAR
NUMBER:  6466
SUBJECT: GRB 070529: Swift detection of a burst with an optical aterglow
DATE:    07/05/29 13:13:10 GMT
FROM:    David Palmer at LANL  

S. T. Holland (CRESST/GSFC/USRA), L. M. Barbier (NASA/GSFC),
S. D. Barthelmy (GSFC), P. J. Brown (PSU), S. Campana (INAF-OAB),
G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), O. Godet (U Leicester), C. Gronwall (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB), H. A. Krimm (GSFC/USRA),
V. La Parola (INAF-IASFPA), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS),
B. Sbarufatti (INAF-IASFPA), R. L. C. Starling (U Leicester),
G. Tagliaferri (INAF-OAB), E. Troja (INAF-IASFPA),
D. E. Vanden Berk (PSU), S. D. Vergani (DIAS-DCU), L. Vetere (PSU)
and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 12:48:28 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070529 (trigger=280706).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 283.750, +20.639 which is
   RA(J2000) = 18h 55m 00s
   Dec(J2000) = +20d 38' 21"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a multi-peaked
structure at least 40 seconds long.  The peak count rate
was ~1500 counts/sec (15-350 keV), at ~2 sec after the trigger.
+ Read more
May 21, 2007 GRB070521
TITLE:   GCN CIRCULAR
NUMBER:  6431
SUBJECT: GRB 070521: Swift detection of a burst
DATE:    07/05/21 07:04:35 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. Guidorzi (Univ Bicocca&INAF-OAB), S. D. Barthelmy (GSFC),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. B. Markwardt (GSFC/UMD), A. Moretti (INAF-OAB),
P. T. O'Brien (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB) and
G. Tagliaferri (INAF-OAB) report on behalf of the Swift Team:

At 06:51:10 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070521 (trigger=279935).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 242.669, +30.241 which is
   RA(J2000)  =  16h 10m 41s
   Dec(J2000) = +30d 14' 27"
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 ~7000 counts/sec (15-350 keV), at ~20 sec after the trigger.
+ Read more
May 20, 2007 GRB070520b
TITLE:   GCN CIRCULAR
NUMBER:  6425
SUBJECT: GRB 070520B: Swift detection of a burst
DATE:    07/05/20 18:14:26 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. Moretti (INAF-OAB), S. D. Barthelmy (GSFC), M. M. Chester (PSU),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU), J. A. Kennea (PSU),
V. Mangano (INAF-IASFPA), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB),
M. Stamatikos (NASA/ORAU), E. Troja (INAF-IASFPA) and
S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team:

At 17:44:53 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070520B (trigger=279898).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 121.951, +57.617 which is
   RA(J2000)  =  08h 07m 48s
   Dec(J2000) = +57d 37' 00"
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 ~1000 counts/sec (15-350 keV), at ~0 sec after the trigger.
This burst occurred during a Malindi data downlink session
which buffered the initial notices for up to 12 minutes.
+ Read more
May 20, 2007 GRB070520
TITLE:   GCN CIRCULAR
NUMBER:  6423
SUBJECT: GRB 070520: Swift detection of a burst
DATE:    07/05/20 13:21:43 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

P. Romano (Univ. Bicocca & INAF-OAB), S. D. Barthelmy (GSFC),
M. M. Chester (PSU), N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and
S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team:

At 13:05:10 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070520 (trigger=279817).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 193.316, +74.993 which is
   RA(J2000)  =  12h 53m 16s
   Dec(J2000) = +74d 59' 36"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). This is an 88-sec image trigger, and as such
the TDRSS lightcurve does not show anything significant above background,
as is typical for image triggers.
+ Read more
May 18, 2007 GRB070518
TITLE:   GCN CIRCULAR
NUMBER:  6415
SUBJECT: GRB 070518: Swift detection of a burst with optical afterglow
DATE:    07/05/18 14:50:19 GMT
FROM:    David Palmer at LANL  

C. Guidorzi (Univ Bicocca&INAF-OAB), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
S. Campana (INAF-OAB), M. M. Chester (PSU),
G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), F. E. Marshall (NASA/GSFC),
A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), J. L. Racusin (PSU),
P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU),
G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
E. Troja (INAF-IASFPA), D. E. Vanden Berk (PSU) and
S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team:

At 14:26:21 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070518 (trigger=279592). Swift slewed immediately to the
burst. The BAT on-board calculated location is  RA, Dec 254.223, +55.297 which
is
   RA(J2000) = 16h 56m 54s
   Dec(J2000) = +55d 17'47"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows a single
(FRED-like) peak with a duration of about 7 sec. The peak count rate
was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
May 17, 2007 GRB070517
TITLE:   GCN CIRCULAR
NUMBER:  6411
SUBJECT: GRB 070517: Swift detection of a burst
DATE:    07/05/17 11:40:57 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. D. Vergani (DIAS-DCU), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
S. Campana (INAF-OAB), M. M. Chester (PSU),
G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA),
W. B. Landsman (NASA/GSFC), V. Mangano (INAF-IASFPA),
A. Moretti (INAF-OAB), P. T. O'Brien (U Leicester),
J. P. Osborne (U Leicester), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB),
G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester),
G. Tagliaferri (INAF-OAB), E. Troja (INAF-IASFPA) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 11:20:58 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070517 (trigger=279494).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 277.579, -62.333 which is
   RA(J2000)  =  18h 30m 19s
   Dec(J2000) = -62d 19' 56"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows two peaks
with a duration of about 10 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~1 sec after the trigger.
+ Read more
May 9, 2007 GRB070509
TITLE:   GCN CIRCULAR
NUMBER:  6394
SUBJECT: GRB 070509: Swift detection of a burst
DATE:    07/05/09 03:17:03 GMT
FROM:    David Palmer at LANL  

L. Vetere (PSU), S. D. Barthelmy (GSFC), M. M. Chester (PSU),
D. Grupe (PSU), S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC),
C. Pagani (PSU), D. M. Palmer (LANL), J. L. Racusin (PSU),
M. Stamatikos (NASA/ORAU) and D. E. Vanden Berk (PSU) report on
behalf of the Swift Team:

At 02:48:27 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070509 (trigger=278903).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 237.927, -78.681 which is
   RA(J2000)  =  15h 51m 42s
   Dec(J2000) = -78d 40' 49"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a single FRED-like peak
with a duration of about 10 sec.  The peak count rate
was ~2000 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
May 8, 2007 GRB070508
TITLE:   GCN CIRCULAR
NUMBER:  6383
SUBJECT: GRB 070508: Swift detection of an intense burst with an optical counterpart
DATE:    07/05/08 04:47:27 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D. Grupe (PSU), S. D. Barthelmy (GSFC), M. M. Chester (PSU),
G. Cusumano (INAF-IASFPA), C. B. Markwardt (GSFC/UMD),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU), D. M. Palmer (LANL),
J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 04:18:17 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070508 (trigger=278854).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 312.783, -78.368 which is
   RA(J2000)  =  20h 51m 08s
   Dec(J2000) = -78d 22' 04"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a complex multi-peaked
structure with a duration of at least 40 sec.  The peak count rate
was ~45000 counts/sec (15-350 keV), at ~15 sec after the trigger.
+ Read more
May 6, 2007 GRB070506
TITLE:   GCN CIRCULAR
NUMBER:  6375
SUBJECT: GRB 070506: Swift detection of a burst with optical afterglow
DATE:    07/05/06 06:05:32 GMT
FROM:    David Palmer at LANL  

C. Pagani (PSU), M. M. Chester (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB), S. Immler (GSFC/USRA),
C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), J. L. Racusin (PSU),
T. Sakamoto (NASA/ORAU), M. Stamatikos (NASA/ORAU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 05:35:58 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070506 (trigger=278693).  Swift slewed to the burst
immediately after the end of the 64 second image trigger.
The BAT on-board calculated location is RA, Dec 347.217, +10.728 which is
   RA(J2000) = 23h 08m 52s
   Dec(J2000) = +10d 43' 42"
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 6 sec.  The peak count rate
was ~1700 counts/sec (15-350 keV), at ~6 sec after the trigger.
+ Read more
April 29, 2007 GRB070429b
TITLE:   GCN CIRCULAR
NUMBER:  6358
SUBJECT: GRB 070429B: Swift detection of a short burst
DATE:    07/04/29 03:41:59 GMT
FROM:    Craig Markwardt at NASA/GSFC/UMD  

C. B. Markwardt (GSFC/UMD), L. M. Barbier (NASA/GSFC),
S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester),
J. K. Cannizzo (NASA/UMBC), M. M. Chester (PSU),
N. Gehrels (NASA/GSFC), S. D. Hunsberger (PSU),
W. B. Landsman (NASA/GSFC), K. L. Page (U Leicester),
D. M. Palmer (LANL), G. Sato (GSFC/ISAS) and
R. L. C. Starling (U Leicester) report on behalf of the Swift Team:

At 03:09:04 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070429B (trigger=277582).  Swift slewed to the burst
following a 165 second delay due to the Earth-limb constraint.
The BAT on-board calculated location is
RA, Dec 328.024, -38.844 which is
   RA(J2000)  =  21h 52m 06s
   Dec(J2000) = -38d 50' 37"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a short spike
with a duration of about 700 msec.  The peak count rate
was ~3000 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
April 29, 2007 GRB070429
TITLE:   GCN CIRCULAR
NUMBER:  6355
SUBJECT: GRB 070429: Swift detection of a burst
DATE:    07/04/29 01:51:27 GMT
FROM:    David Palmer at LANL  

S. D. Barthelmy (GSFC), C. B. Markwardt (GSFC/UMD),
K. L. Page (U Leicester), D. M. Palmer (LANL), G. Sato (GSFC/ISAS),
M. Stamatikos (NASA/ORAU) and R. L. C. Starling (U Leicester) report
on behalf of the Swift Team:

At 01:35:10 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070429 (trigger=277571).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 297.687, -32.388 which is
   RA(J2000)  =  19h 50m 45s
   Dec(J2000) = -32d 23' 16"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  As is typical for image trigger GRBs,
the BAT light curve shows little obvious variation.  A detailed
light curve will require the data downlinked via Malindi.
+ Read more
April 27, 2007 GRB070427
TITLE:   GCN CIRCULAR
NUMBER:  6352
SUBJECT: GRB 070427: Swift detection of a burst
DATE:    07/04/27 08:48:05 GMT
FROM:    David Palmer at LANL  

G. Sato (GSFC/ISAS), S. Campana (INAF-OAB), P. A. Evans (U Leicester),
C. Guidorzi (Univ Bicocca&INAF-OAB), C. B. Markwardt (GSFC/UMD),
P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
R. L. C. Starling (U Leicester) and H. Ziaeepour (UCL-MSSL) report on
behalf of the Swift Team:

At 08:31:08 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070427 (trigger=277356).  This burst was too close to
the Sun (42 degrees) for Swift to slew to it.
The BAT on-board calculated location is
RA, Dec 28.862, -27.633 which is
   RA(J2000) = 01h 55m 27s
   Dec(J2000) = -27d 37' 57"
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 15 sec.  The peak count rate
was ~3500 counts/sec (15-350 keV), at ~5 sec after the trigger.
+ Read more
April 20, 2007 GRB070420
TITLE:   GCN CIRCULAR
NUMBER:  6330
SUBJECT: GRB 070420: Swift detection of a burst with optical afterglow
DATE:    07/04/20 06:56:57 GMT
FROM:    David Palmer at LANL  

M. Stamatikos (NASA/ORAU), D. N. Burrows (PSU),
G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester),
C. Gronwall (PSU), V. Mangano (INAF-IASFPA),
C. B. Markwardt (GSFC/UMD), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), A. M. Parsons (GSFC), M. Perri (ASDC) and
G. Stratta (ASDC) report on behalf of the Swift Team:

At 06:18:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070420 (trigger=276321).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 121.253, -45.561 which is
   RA(J2000) = 08h 05m 01s
   Dec(J2000) = -45d 33' 38"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a multiply-peaked
structure with a duration of at least 70 sec starting at T-50s.
The peak count rate was ~4000 counts/sec (15-350 keV), at ~7 sec
after the trigger.
+ Read more
April 19, 2007 GRB070419b
TITLE:   GCN CIRCULAR
NUMBER:  6305
SUBJECT: GRB 070419B: Swift detection of a burst
DATE:    07/04/19 11:12:05 GMT
FROM:    David Burrows at PSU/Swift  

A. M. Parsons (GSFC), D. N. Burrows (PSU), M. Capalbi (ASDC),
P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB), W. B. Landsman (NASA/GSFC),
C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC),
P. T. O'Brien (U Leicester), D. M. Palmer (LANL), M. Perri (ASDC),
P. Romano (Univ. Bicocca & INAF-OAB), E. Troja (INAF-IASFPA) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 10:44:05 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070419B (trigger=276212).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 315.719, -31.267 which is
   RA(J2000) = 21h 02m 52s
   Dec(J2000) = -31d 15' 59"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows multiple peaks,
with a duration of about 160 seconds. The peak count rate was
~2500 counts/sec (15-350 keV), at ~0 sec after the trigger.
We note that this burst is distinct from GRB 070419A (trigger 276206).
+ Read more
April 19, 2007 GRB070419
TITLE:   GCN CIRCULAR
NUMBER:  6302
SUBJECT: GRB 070419: Swift detection of a burst
DATE:    07/04/19 10:30:53 GMT
FROM:    David Palmer at LANL  

M. Stamatikos (NASA/ORAU), D. N. Burrows (PSU), S. Campana (INAF-OAB),
G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB), V. La Parola (INAF-IASFPA),
W. B. Landsman (NASA/GSFC), V. Mangano (INAF-IASFPA),
C. B. Markwardt (GSFC/UMD), P. T. O'Brien (U Leicester),
D. M. Palmer (LANL), A. M. Parsons (GSFC),
P. Romano (Univ. Bicocca & INAF-OAB), B. Sbarufatti (INAF-IASFPA),
G. Stratta (ASDC), S. D. Vergani (DIAS-DCU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 09:59:26 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070419 (trigger=276205).  Swift slewed immediately to
the burst.  The BAT on-board calculated location is
RA, Dec 182.714, +39.908 which is
   RA(J2000) = 12h 10m 51s
   Dec(J2000) = +39d 54' 30"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve suggests emission from
T-10 to T+20 with a peak count rate of ~500 counts/sec (15-350 keV),
at ~4 sec after the trigger.  However, as for most image triggers,
the TDRSS light curve data is noisy and we will require the Malindi
pass data for a more definitive analysis.
+ Read more
April 12, 2007 GRB070412
TITLE:   GCN CIRCULAR
NUMBER:  6273
SUBJECT: GRB 070412: Swift detection of a burst
DATE:    07/04/12 01:58:32 GMT
FROM:    David Palmer at LANL  

P. Romano (Univ. Bicocca & INAF-OAB), S. D. Barthelmy (GSFC),
D. N. Burrows (PSU), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA),
H. A. Krimm (GSFC/USRA), A. Moretti (INAF-OAB), C. Pagani (PSU),
D. M. Palmer (LANL), T. Sakamoto (NASA/ORAU),
M. Stamatikos (NASA/ORAU) and D. E. Vanden Berk (PSU) report on
behalf of the Swift Team:

At 01:27:03 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070412 (trigger=275119).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 181.505, +40.101 which is
   RA(J2000) = 12h 06m 01s
   Dec(J2000) = +40d 06' 03"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve showed a double-peaked
structure with peaks at approximately 5 and 30 seconds and a total
duration of about 40 sec.  The peak count rate
was ~2400 counts/sec (15-350 keV), at ~5 sec after the trigger.
+ Read more
April 11, 2007 GRB070411
TITLE:   GCN CIRCULAR
NUMBER:  6267
SUBJECT: GRB 070411: Swift detection of a burst with optical afterglow
DATE:    07/04/11 20:43:42 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. Moretti (INAF-OAB), S. D. Barthelmy (GSFC), P. J. Brown (PSU),
D. N. Burrows (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC),
G. Cusumano (INAF-IASFPA), N. Gehrels (NASA/GSFC),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), V. Mangano (INAF-IASFPA),
F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester),
C. Pagani (PSU), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), T. Sakamoto (NASA/ORAU),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB),
D. E. Vanden Berk (PSU), S. D. Vergani (DIAS-DCU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 20:12:33 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070411 (trigger=275087).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 107.338, +1.083 which is
   RA(J2000)  =  07h 09m 21s
   Dec(J2000) = +01d 04' 57"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows an initial weak peak
starting at T-1 sec and fading by T+5 sec and then a stronger second peak
from T+50 to T+90 sec with an amplitude of ~1000 cnts/sec
in the 15-350 keV band.
+ Read more
April 6, 2007 GRB070406
TITLE:   GCN CIRCULAR
NUMBER:  6247
SUBJECT: GRB 070406: Swift detection of a burst
DATE:    07/04/06 21:00:11 GMT
FROM:    David Palmer at LANL  

J. R. Cummings (NASA/UMBC), J. A. Kennea (PSU),
W. B. Landsman (NASA/GSFC), K. L. Page (U Leicester),
D. M. Palmer (LANL), M. Stamatikos (NASA/ORAU) and
E. Troja (INAF-IASFPA) report on behalf of the Swift Team:

At 00:50:40 UT, BAT triggered and located GRB 070406
(Trigger #274153) as a sub-threshold (6.4 sigma) peak
in a 0.256 second image.  Subsequent ground analysis
optimized the detection to a confident 8.3 sigma, at the
location: RA, dec 198.956, +16.529d (J2000), which is
  RA(J2000)  +13h 15m 49s
  dec(J2000) +16d 31' 46"
with an uncertainty of 3 arcmin (radius, 90% containment,
including  systematic uncertainty).  The burst is ~0.7 seconds
long with a double-peaked profile, with a peak
count rate of 1200 counts/s.
+ Read more
March 30, 2007 GRB070330
TITLE:   GCN CIRCULAR
NUMBER:  6232
SUBJECT: GRB 070330: Swift detection of a burst
DATE:    07/03/30 23:22:06 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D. Grupe (PSU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester),
M. M. Chester (PSU), C. Guidorzi (Univ Bicocca&INAF-OAB),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC),
D. M. Palmer (LANL), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU) and M. C. Stroh (PSU) report on behalf of
the Swift Team:

At 22:51:31 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070330 (trigger=273180).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 269.519, -63.779 which is
   RA(J2000)  =  17h 58m 05s
   Dec(J2000) = -63d 46' 44"
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 10 sec.  The peak count rate
was ~1500 counts/sec (15-350 keV), at ~1 sec after the trigger.
+ Read more
March 28, 2007 GRB070328
TITLE:   GCN CIRCULAR
NUMBER:  6224
SUBJECT: GRB 070328: Swift detection of a burst
DATE:    07/03/28 04:14:41 GMT
FROM:    David Palmer at LANL  

C. B. Markwardt (GSFC/UMD), M. M. Chester (PSU),
J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester),
N. Gehrels (NASA/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),
M. Stamatikos (NASA/ORAU) and E. Troja (INAF-IASFPA) report on behalf
of the Swift Team:

At 03:53:53 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070328 (trigger=272773).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 65.117, -34.069 which is
   RA(J2000) = 04h 20m 28s
   Dec(J2000) = -34d 04' 07"
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 70 sec.  The peak count rate
was ~8000 counts/sec (15-350 keV), at ~3 sec after the trigger.
+ Read more
March 26, 2007 GRB070326
TITLE:   GCN CIRCULAR
NUMBER:  6653
SUBJECT: GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
DATE:    07/07/22 21:59:33 GMT
FROM:    Antonio Copete at Harvard U  

A. Copete, J. Grindlay, and J. Hong (Harvard),
S. Barthelmy and N. Gehrels (NASA/GSFC)

We report on the first GRB found solely from imaging using BAT slew data,
from a test run carried out in March 2007 of what will become the BAT Slew
Survey (BATSS; Grindlay, astro-ph# 0704.3294). A 58sec-long slew which
began on 2007-03-26 16:29:10 UT, from a prior SAA passage onto Swift
observation number 00271019007, included a burst (hereafter referred to as
GRB 070326) detected independently at 8.9 sigma and 6.9 sigma in the
15-50keV and 50-150keV energy bands, respectively. The GRB T0 occurred 2
sec after the start of the slew. The averaged position of the burst was
found to be:
  RA(J2000) = 2h 41m 20.8s
  Dec(J2000) = -66d 59' 21"
with an uncertainty radius of 3.9 arcmin (99% confidence).
The time-averaged coding fraction at the burst location was 65% and the
exposure time was 58.0 sec.
+ Read more
March 18, 2007 GRB070318
TITLE:   GCN CIRCULAR
NUMBER:  6210
SUBJECT: GRB 070318: Swift detection of a burst with an optical afterglow
DATE:    07/03/18 07:49:43 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. R. Cummings (NASA/UMBC), S. D. Barthelmy (GSFC),
D. N. Burrows (PSU), G. Cusumano (INAF-IASFPA),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
V. La Parola (INAF-IASFPA), T. Mineo (INAF-IASFPA) and
D. M. Palmer (LANL) report on behalf of the Swift Team:

At 07:28:56 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070318 (trigger=271019).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 48.540, -42.962 which is
   RA(J2000)  =  03h 14m 10s
   Dec(J2000) = -42d 57' 42"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a single FRED-like peak
with a duration of about 70 sec.  The peak count rate
was ~4000 counts/sec (15-350 keV), at ~2 sec after the trigger.
+ Read more
March 6, 2007 GRB070306
TITLE:   GCN CIRCULAR
NUMBER:  6169
SUBJECT: GRB 070306: Swift detection of a burst
DATE:    07/03/06 17:04:20 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. B. Pandey (UCL-MSSL), S. D. Barthelmy (GSFC),
J. R. Cummings (NASA/UMBC), M. De Pasquale (UCL-MSSL),
N. Gehrels (NASA/GSFC), O. Godet (U Leicester),
S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/USRA),
J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA),
V. Mangano (INAF-IASFPA), C. B. Markwardt (GSFC/UMD),
F. E. Marshall (NASA/GSFC), A. Moretti (INAF-OAB), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC),
T. Sakamoto (NASA/ORAU), B. Sbarufatti (INAF-IASFPA),
M. Stamatikos (NASA/ORAU), E. Troja (INAF-IASFPA) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 16:41:28 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070306 (trigger=263361).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 148.082, +10.471 which is
   RA(J2000)  =  09h 52m 20s
   Dec(J2000) = +10d 28' 17"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  We did not receive a BAT lightcurve down TDRSS
so we can not say anything about its shape.  However, this 12 second
trigger does have a strong image significance, and as such, the
reliability is high.
+ Read more
February 27, 2007 GRB070227
TITLE:   GCN CIRCULAR
NUMBER:  6156
SUBJECT: GRB 070227: Swift detection of a burst in ground analysis
DATE:    07/02/28 06:42:44 GMT
FROM:    Claudio Pagani at PSU/Swift-XRT  

C. Pagani (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC),
D. M. Palmer (LANL), T. Sakamoto (NASA/ORAU) and L. Vetere (PSU)
report on behalf of the Swift Team:

At 2007-02-27 22:21:59 Swift-BAT detected GRB 070227 (trigger 262347).
The burst was not found automatically onboard, because a planned
slew terminated the trigger prematurely. The burst was found later
in ground analysis. Swift did not slew to the burst, and a target
of opportunity observation for this burst will be uploaded at
the next command opportunity (around 1400 UT).
+ Read more
February 24, 2007 GRB070224
TITLE:   GCN CIRCULAR
NUMBER:  6137
SUBJECT: GRB 070224: Swift detection of a burst
DATE:    07/02/24 20:48:09 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. L. Racusin (PSU), L. M. Barbier (NASA/GSFC),
S. D. Barthelmy (GSFC), M. M. Chester (PSU),
G. Cusumano (INAF-IASFPA), D. Grupe (PSU), J. A. Kennea (PSU),
D. M. Palmer (LANL), R. L. C. Starling (U Leicester) and
L. Vetere (PSU) report on behalf of the Swift Team:

At 20:27:58 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070224 (trigger=261880).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 178.990, -13.340 which is
   RA(J2000)  =  11h 55m 58s
   Dec(J2000) = -13d 20' 23"
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 25 sec.  The peak count rate
was ~500 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
February 23, 2007 GRB070223
TITLE:   GCN CIRCULAR
NUMBER:  6125
SUBJECT: GRB070223: Swift burst
DATE:    07/02/23 01:43:51 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

L. Vetere (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
S. Campana (INAF-OAB), M. M. Chester (PSU), N. Gehrels (NASA/GSFC),
D. Grupe (PSU), J. A. Kennea (PSU), W. B. Landsman (NASA/GSFC),
F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL),
M. Stamatikos (NASA/ORAU) and E. Troja (INAF-IASFPA) report on behalf
of the Swift Team:

At 01:15:00 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070223 (trigger=261664).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 153.452, +43.121 which is
   RA(J2000)  =  10h 13m 49s
   Dec(J2000) = +43d 07' 16"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows several peaks
with a duration of about 50 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
February 20, 2007 GRB070220
TITLE:   GCN CIRCULAR
NUMBER:  6114
SUBJECT: GRB 070220: Swift detection of a burst
DATE:    07/02/20 05:05:13 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

M. Stamatikos (NASA/ORAU), S. D. Barthelmy (GSFC),
A. P. Beardmore (U Leicester), D. N. Burrows (PSU),
N. Gehrels (NASA/GSFC), S. Immler (GSFC/USRA), J. A. Kennea (PSU),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL),
T. Sakamoto (NASA/ORAU), P. Schady (MSSL-UCL) and
D. E. Vanden Berk (PSU) report on behalf of the Swift Team:

At 04:44:33 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070220 (trigger=261299).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 34.819, +68.818 which is
   RA(J2000)  = +02h 19m 17s
   Dec(J2000) = +68d 49' 06"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows multiple peaks
with a duration of about 60 sec.  The peak count rate
was ~7000 counts/sec (15-350 keV), at ~15 sec after the trigger.
+ Read more
February 19, 2007 GRB070219
TITLE:   GCN CIRCULAR
NUMBER:  6104
SUBJECT: GRB 070219: Swift detection of a burst
DATE:    07/02/19 01:43:52 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

T. Sakamoto (NASA/ORAU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
F. E. Marshall (NASA/GSFC), C. Pagani (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL), P. Schady (MSSL-UCL),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and
E. Troja (INAF-IASFPA) report on behalf of the Swift Team:

At 01:10:16 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070219 (trigger=261132).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 260.198, +69.364 which is
   RA(J2000)  =  17h 20m 48s
   Dec(J2000) = +69d 21' 51"
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 ~2000 counts/sec (15-350 keV), at ~1 sec after the trigger.
+ Read more
February 9, 2007 GRB070209
TITLE:   GCN CIRCULAR
NUMBER:  6086
SUBJECT: GRB 070209: Swift detection of a short hard burst
DATE:    07/02/09 03:53:23 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

G. Sato (GSFC/ISAS), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
M. M. Chester (PSU), C. Gronwall (PSU),
S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/USRA),
F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), M. Perri (ASDC),
M. Stamatikos (NASA/ORAU), G. Stratta (ASDC) and
D. E. Vanden Berk (PSU) report on behalf of the Swift Team:

At 03:33:41 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070209 (trigger=259803).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 46.237, -47.370 which is
   RA(J2000)  =  03h 04m 57s
   Dec(J2000) = -47d 22' 11"
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 0.2 sec.  The peak count rate
was ~2500 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
February 8, 2007 GRB070208
TITLE:   GCN CIRCULAR
NUMBER:  6074
SUBJECT: GRB 070208: Swift detection of a burst
DATE:    07/02/08 09:34:19 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

G. Sato (GSFC/ISAS), S. D. Barthelmy (GSFC), S. Campana (INAF-OAB),
M. L. Conciatore (ASDC), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. Gronwall (PSU),
C. Guidorzi (Univ Bicocca&INAF-OAB), V. Mangano (INAF-IASFPA),
P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester),
K. L. Page (U Leicester), D. M. Palmer (LANL),
P. Romano (Univ. Bicocca & INAF-OAB), G. Stratta (ASDC),
G. Tagliaferri (INAF-OAB), S. D. Vergani (DIAS-DCU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 09:10:34 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070208 (trigger=259714).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 197.920, +61.959 which is
   RA(J2000)  =  13h 11m 41s
   Dec(J2000) = +61d 57' 31"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a single peak structure
with a duration of about 2 sec.  The peak count rate
was ~1200 counts/sec (15-350 keV), at ~0 sec after the trigger.
+ Read more
January 29, 2007 GRB070129
TITLE:   GCN CIRCULAR
NUMBER:  6053
SUBJECT: GRB 070129: Swift detection of a burst
DATE:    07/01/29 23:49:36 GMT
FROM:    David Burrows at PSU/Swift  

O. Godet (U Leicester), D. N. Burrows (PSU), M. M. Chester (PSU),
S. T. Holland (CRESST/GSFC/USRA), J. A. Kennea (PSU),
C. B. Markwardt (GSFC/UMD), K. M. McLean (LANL/UTD),
K. L. Page (U Leicester), D. M. Palmer (LANL),
T. Sakamoto (NASA/ORAU), M. Stamatikos (NASA/ORAU),
R. L. C. Starling (U Leicester), E. Troja (INAF-IASFPA),
D. E. Vanden Berk (PSU) and S. D. Vergani (DIAS-DCU) report on behalf
of the Swift Team:

At 23:35:10 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070129 (trigger=258408).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 37.014, +11.697 which is
   RA(J2000) = 02h 28m 03s
   Dec(J2000) = +11d 41' 51"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows no obvious
variation in the count rate, which is not uncommon for image
triggers.
+ Read more
January 26, 2007 GRB070126
TITLE:   GCN CIRCULAR
NUMBER:  6027
SUBJECT: GRB 070126?: Swift detection of a possible burst
DATE:    07/01/26 03:04:26 GMT
FROM:    Loredana Vetere at PSU  

L. Vetere (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC),
S. T. Holland (CRESST/GSFC/USRA), S. Immler (GSFC/USRA),
C. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC),
D. M. Palmer (LANL), J. L. Racusin (PSU), J. L. Racusin (PSU),
M. Stamatikos (NASA/ORAU), R. L. C. Starling (U Leicester) and
E. Troja (INAF-IASFPA) report on behalf of the Swift Team:

At 02:33:26 UT, the Swift Burst Alert Telescope (BAT) triggered and
located a possible source (trigger=257741).  Swift slewed immediately
to the location.
The BAT on-board calculated location is
RA, Dec 33.460, -73.523 which is
   RA(J2000) = 02h 13m 50s
   Dec(J2000) = -73d 31' 23"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows no significant variation,
which is not uncommon for image triggers. We will have to wait for ground
analysis to determine if this is a real source.
+ Read more
January 10, 2007 GRB070110
TITLE:   GCN CIRCULAR
NUMBER:  6005
SUBJECT: GRB 070110: Swift detection of a burst with a possible optical afterglow
DATE:    07/01/10 07:57:12 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), M. M. Chester (PSU),
G. Cusumano (INAF-IASFPA), P. A. Evans (U Leicester),
N. Gehrels (NASA/GSFC), C. B. Markwardt (GSFC/UMD),
T. Mineo (INAF-IASFPA), K. L. Page (U Leicester),
D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB),
B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU) and
R. L. C. Starling (U Leicester) report on behalf of the Swift Team:

At 07:22:41 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070110 (trigger=255445).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 0.910, -52.961 which is
   RA(J2000)  =  00h 03m 38s
   Dec(J2000) = -52d 57' 39"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows a multi-peaked
structure with a duration of about 70 sec.  The peak count rate
was ~1000 counts/sec (15-350 keV), at ~18 sec after the trigger.
+ Read more
January 7, 2007 GRB070107
TITLE:   GCN CIRCULAR
NUMBER:  5999
SUBJECT: GRB 070107: Swift detection of a burst
DATE:    07/01/07 13:10:10 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

M. Stamatikos (NASA/ORAU), S.D. Barthelmy (GSFC), M. M. Chester (PSU),
G. Cusumano (INAF-IASFPA), W. B. Landsman (NASA/GSFC),
T. Mineo (INAF-IASFPA), D. M. Palmer (LANL) and
P. Romano (Univ. Bicocca & INAF-OAB) report on behalf of the Swift Team:

At 12:05:18 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 070107 (trigger=255029). Swift slewed immediately to the
burst. The BAT on-board calculated location is
RA, Dec 159.408, -53.208 which is
     RA(J2000)  = 10h 37m 38s
     Dec(J2000) = -53d 12'
27" with an uncertainty of 3 arcmin (radius, 90% containment,
including  systematic uncertainty). The BAT light curve showed a
broad peak lasting about 40 seconds with smaller structure. The peak
count rate was ~2500 counts/sec (15-350 keV), at ~6 sec after the
trigger.
+ Read more
January 3, 2007 GRB070103
TITLE:   GCN CIRCULAR
NUMBER:  5988
SUBJECT: GRB 070103: Swift detection of a burst
DATE:    07/01/03 21:12:06 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

T. Sakamoto (NASA/ORAU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU),
M. M. Chester (PSU), J. R. Cummings (NASA/UMBC),
N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/GSFC/USRA),
S. Immler (GSFC/USRA), J. A. Kennea (PSU), H. A. Krimm (GSFC/USRA),
V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC),
K. M. McLean (LANL/UTD), C. Pagani (PSU), S. B. Pandey (UCL-MSSL),
A. M. Parsons (GSFC), P. Romano (Univ. Bicocca & INAF-OAB),
B. Sbarufatti (INAF-IASFPA), D. E. Vanden Berk (PSU) and
H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:

At 20:46:39.41 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB  (trigger=254532).  Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA=352.557, Dec=+26.875 (J2000),  which is
   RA(J2000)  = 23h 30m 14s
   Dec(J2000) = +26d 52' 32"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty).  The BAT light curve shows two peaks separated
by ~10 sec and a few more weak peaks extending out to ~T+20 sec.
The peak count rate was ~2400 counts/sec (15-350 keV), at ~0 sec
after the trigger.
+ Read more