The Neil Gehrels Swift Observatory

Swift's Gamma Ray Bursts from 2005


December 27, 2005 GRB051227
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4397
SUBJECT: GRB 051227: Swift detection of a burst
DATE:    05/12/27 18:59:47 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

L. Barbier (GSFC), S. Barthelmy (GSFC), A. Beardmore (U Leicester),
D. Burrows (PSU), J. Cummings (GSFC/NRC), A. Falcone (PSU), N. Gehrels (GSFC),
K. Page (U Leicester), A. Retter (PSU), P. Roming (PSU),
T. Sakamoto (GSFC)
on behalf of the Swift team:

At 18:07:16 UT, Swift-BAT triggered and located GRB 051227 (trigger=174738).
The spacecraft slewed immediately.  The BAT on-board calculated location is
RA,Dec 125.270d,+31.929d {08h 21m 05s,+31d 55' 44"} (J2000), with an uncertainty
of 3 arcmin (radius, 90% containment, stat+sys).  The BAT light curve shows
a multi-peak structure with a total duration of at least 8 sec.  The peak count
rate was ~3500 counts/sec (15-350 keV), at 0 seconds after the trigger.
+ Read more
December 21, 2005 GRB051221B
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4376
SUBJECT: Swift-BAT detection of a possible burst
DATE:    05/12/21 20:51:54 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

P. Boyd (GSFC), S. Barthelmy (GSFC), D. Burrows (PSU),
J. Cummings (GSFC/NRC), N. Gehrels (GSFC), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), F. Marshall (GSFC), K. Page (U Leicester),
D. Palmer (LANL), A. Parsons (GSFC), J. Racusin (PSU), P. Roming (PSU),
T. Sakamoto (GSFC)
on behalf of the Swift team:

At 20:03:20 UT, Swift-BAT triggered and located a source (trigger=173904).
The spacecraft slewed promptly after the end of the image trigger.
The BAT on-board calculated location is RA,Dec 312.395d,+53.054d
{20h 49m 35s,+53d 03' 14"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  All we have at this time is
the TDRSS lightcurve.  This plus the fact that this is a 192-sec
image trigger means that we can not say if this trigger is due to a real GRB,
a hard x-ray transient, or a noise event.  We note that the galactic
latitude is 6 deg.
+ Read more
December 21, 2005 GRB051221
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4363
SUBJECT: GRB 051221: Swift detection of a bright short burst
DATE:    05/12/21 02:24:36 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. Parsons (GSFC), S. Barthelmy (GSFC), D. Burrows (PSU), M. Capalbi (ASDC),
J. Cummings (GSFC/NRC), N. Gehrels (GSFC), C. Gronwall (PSU),
H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), F. Marshall (GSFC),
K. Page (U Leicester), D. Palmer (LANL),
on behalf of the Swift team:

At 01:51:16 UT, Swift-BAT triggered and located GRB 051221 (trigger=173780).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 328.711d,+16.896d {21h 54m 51s,+16d 53' 45"} with an uncertainty
of 3 arcmin (radius, 90% containment, stat+sys).  The BAT light curve shows
a single bright short peak at T0 with a duration less than 128 msec
followed by a 2nd smaller and much softer peak at T+1 sec with an exponential
decay lasting ~3 sec.  The peak count rate was ~70,000 counts/sec (15-350 keV),
at ~0 seconds after the trigger.
+ Read more
December 13, 2005 GRB051213
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4345
SUBJECT: GRB 051213: Swift-BAT detection of a burst
DATE:    05/12/13 08:09:13 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

T. Mineo (IASF-Pa INAF), S. Barthelmy (GSFC), G. Cusumano (IASF-Pa INAF),
N. Gehrels (GSFC), S. Hunsberger (PSU), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), K. Page (U Leicester), D. Palmer (LANL)
on behalf of the Swift team:

At 07:13:04 UT, Swift-BAT triggered and located GRB 051213 (trigger=172516).
The BAT on-board calculated location is RA,Dec 252.123d,-59.207d
{16h 48m 29s,-59d 12' 25"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  The spacecraft did not slew
because of the Sun observing constraint.  The location is 36 deg from the Sun,
and it will not be observable by Swift NFIs for at least three weeks.
This was a 64-sec image trigger with a 9-sigma significance in the image domain.
The BAT lightcurve shows hints of emission, but it is not possible
to separate source variations from background variations in the rate domain.
The full data set from the next Malindi downlinks in a few hours
will allow the separation of source from background.
+ Read more
December 10, 2005 GRB051210
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4315
SUBJECT: GRB 051210: Swift detection of a burst
DATE:    05/12/10 06:26:53 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

V. Mangano (INAF-IASS), S. Barthelmy (GSFC), D. Burrows (PSU),
J. Cummings (GSFC/NRC), N. Gehrels (GSFC), S. Hunsberger (PSU),
D. Palmer (LANL), A. Parsons (GSFC)
on behalf of the Swift team:

At 05:46:21 UT, Swift-BAT triggered and located GRB 051210 (trigger=171931).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 330.197d,-57.634d {22h 00m 47s,-57d 38' 01"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve shows two ~1-sec peaks with a total duration of ~6 sec.
The peak count rate was ~2200 counts/sec (15-350 keV), at ~0 sec
after the trigger.
+ Read more
November 17, 2005 GRB051117b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4281
SUBJECT: GRB 051117B: Swift detection of a burst
DATE:    05/11/17 13:59:44 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D. Band (PSU), S. Barthelmy (GSFC), A. Beardmore (U Leicester),
D. Burrows (PSU), J. Cummings (GSFC/NRC), S.T. Holland (GSFC/USRA),
M. Goad (U. Leicester), O. Godet (U. Leicester), N. Gehrels (GSFC),
C. Gronwall (PSU), J. Kennea (PSU), H. Krimm (GSFC/USRA),
J. Osborne (U Leicester), K. Page (U Leicester)
on behalf of the Swift team:

At 13:22:54 UT, Swift-BAT triggered and located GRB 051117B (trigger=164279).
The BAT on-board calculated location is RA,Dec 85.225d,-19.245d
{05h 40m 54s,-19d 14' 41"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  The BAT light curve shows
a multi-peak structure with a total duration of ~25 sec.  The peak count
rate was ~800 counts/sec (15-350 keV), at ~2 seconds after the trigger.
+ Read more
November 17, 2005 GRB051117
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4280
SUBJECT: GRB 051117: Swift detection of a bright burst
DATE:    05/11/17 11:44:49 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D. Band (GSFC), S. Barthelmy (GSFC), A. Beardmore (U Leicester),
D. Burrows (PSU), N. Gehrels (GSFC), M. Goad (U. Leicester)
O. Godet (U. Leicester), C. Gronwall (PSU), J. Kennea (PSU),
K. Page (U Leicester), E. Rol (U. Leicester)
on behalf of the Swift team:

At 10:51:20 UT, Swift-BAT triggered and located GRB 051117 (trigger=164268).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 228.405d, +30.870d {+15h 13m 37s, +30d 52' 11"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve shows a single peak with a total duration
of about 20 sec.  The peak count rate was ~1500 counts/sec (15-350 keV),
at ~3 sec after the trigger.
+ Read more
November 14, 2005 GRB051114
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4272
SUBJECT: GRB 051114: Swift-BAT detection of a short burst
DATE:    05/11/15 03:26:12 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. Cummings (GSFC/NRC), S. Barthelmy (GSFC), N. Gehrels (GSFC),
D. Palmer (LANL)
on behalf of the Swift-BAT team:

At 04:11:30 UT, Swift-BAT triggered and located GRB 051114 (trigger=163844).
The on-board software did not locate this burst with sufficient significance,
however ground processing was able to extract a location.  The BAT ground
calculated location is RA,Dec 226.274d,+60.150d {15h 05m 06s,+60d 09' 00"}
(J2000), with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve shows two short peaks separated by ~1 sec with a total
duration of 2 sec.  The peak count rate was ~1500 counts/sec (15-350 keV),
at ~0.5 seconds after the trigger.
+ Read more
November 13, 2005 GRB051113
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4268
SUBJECT: GRB 051113: Swift-BAT detection of a burst
DATE:    05/11/13 15:46:45 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S.T. Holland (GSFC/USRA), L. Barbier (GSFC), S. Barthelmy (GSFC),
N. Gehrels (GSFC), S. Hunsberger (PSU), D. Palmer (LANL)
on behalf of the Swift team:

At 15:22:35 UT, Swift-BAT triggered and located GRB 051113 (trigger=163765).
The spacecraft did not slew to this burst because of the Sun-angle observing
constraint; this burst is 39 deg from the Sun.  The BAT on-board calculated
location is RA,Dec 187.222d,-26.391d {12h 28m 53s,-26d 23' 25"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve shows a single peak with a total duration of ~10 sec.
The peak count rate was ~1400 counts/sec (15-350 keV), at ~2 seconds
after the trigger.
+ Read more
November 11, 2005 GRB051111
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4248
SUBJECT: GRB051111: Swift-BAT detection of a bright burst
DATE:    05/11/11 06:38:44 GMT
FROM:    David Palmer at LANL  

T. Sakamoto (GSFC), D. Burrows (PSU), S. Immler (GSFC/USRA),
N. Gehrels (GSFC), S. Hunsberger (PSU), F. Marshall (GSFC),
D. Palmer (LANL), V. La Parola  (INAF-IASFPa)
on behalf of the Swift team:

At 05:59:41 UT, Swift-BAT triggered and located GRB051111
(trigger=163438).
The BAT on-board calculated location is RA,Dec=348.157,+18.367
{23h 12m 38s,+18d 22' 03"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys). The BAT light curve showed a
broad single peak with a 10 second rise to a peak of 4000 counts/s
(15-350 keV) around T+0 with decaying emission at least to T+20.
The spacecraft did not automatically slew due to Moon constraint.
+ Read more
November 9, 2005 GRB051109b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4222
SUBJECT: GRB 051109B: Swift detection of a burst
DATE:    05/11/09 09:35:58 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

G. Tagliaferri (INAF-OAB), S. Barthelmy (GSFC), D. Burrows (PSU),
S. Campana (INAF-OAB), M. Chester (PSU), N. Gehrels (GSFC),
T. Mineo (INAF-IASF PA), K. Page (U Leicester), D. Palmer (LANL),
T. Sakamoto (GSFC)
on behalf of the Swift team:

At 08:39:39 UT, Swift-BAT triggered and located GRB 051109B (trigger=163170).
The BAT on-board calculated location is RA,Dec 345.440d,+38.672d
{23h 01m 46s,+38d 40' 20"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  The BAT light curve shows
a multi-peak structure with a total duration of ~20 sec.  The peak count rate
was ~2000 counts/sec (15-350 keV), at ~1 sec after the trigger.
+ Read more
November 9, 2005 GRB051109
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4213
SUBJECT: GRB051109: Swift detection of a burst
DATE:    05/11/09 02:14:42 GMT
FROM:    David Palmer at LANL  

G. Tagliaferri (INAF-OAB), S. Barthelmy (GSFC), D. Burrows (PSU),
M. Chester (PSU), N. Gehrels (GSFC), J. Hill (GSFC/USRA),
S. T.  Holland (GSFC/USRA), J. Kennea (PSU), F. Marshall (GSFC),
T. Mineo (INAF-IASFPA),  D. Palmer (LANL), T. Sakamoto (GSFC),
on behalf of the Swift team:

At 01:12:20 UT, Swift-BAT triggered and located GRB051109
(trigger=163136).
The spacecraft slewed immediately. The BAT on-board calculated location
is RA,Dec= 330.296d, +40.837d {22h 01m 11s, +40d 50' 15"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys). The BAT
light curve showed a multi-peak structure with a total duration of
at least 25 sec. The peak count rate was ~2000 counts/sec (15-350 keV),
at ~2 seconds after the trigger.
+ Read more
November 5, 2005 GRB051105
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4188
SUBJECT: GRB 051105: Swift detection of a short burst
DATE:    05/11/05 07:17:42 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

T. Mineo (IASF-Pa/INAF), L. Barbier (GSFC), S. Barthelmy (GSFC),
D. Burrows (PSU), M. Chester (PSU), N. Gehrels (GSFC), J. Kennea (PSU),
H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL),
G. Tagliaferri (OAB/INAF)
on behalf of the Swift team:

At 06:26:41 UT, Swift-BAT triggered and located GRB 051105 (trigger=162580).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 265.289d,+34.921d {17h 41m 09s,+34d 55' 15"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve shows a single spike with a total duration
of less than 128 msec.  The peak count rate was ~3000 counts/sec (15-350 keV),
at 0.0 seconds after the trigger.
+ Read more
October 21, 2005 GRB051021b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4126
SUBJECT: GRB 051021B: Swift detection of a burst
DATE:    05/10/22 00:21:30 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. Retter (PSU), S. Barthelmy (GSFC), D. Burrows (PSU),
M. Chester (PSU), N. Gehrels (GSFC), J. Kennea (PSU),
F. Marshall (GSFC), D. Palmer (LANL), J. Racusin (PSU)
on behalf of the Swift team:

At 23:31:53 UT, Swift-BAT triggered and located GRB 051021B (trigger=160672).
The BAT on-board calculated location is RA,Dec 126.037d,-45.519d
{8h 24m 09s,-45d 31' 09"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  The BAT light curve shows
a single FRED-like peak with structure with a total duration of ~25 sec.
There is some pre-trigger emission starting at T-8 sec.  The peak count rate
was ~1800 counts/sec (15-350 keV), at ~2 seconds after the trigger.
+ Read more
October 16, 2005 GRB051016b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4103
SUBJECT: GRB 051016B: Swift detection of a soft burst
DATE:    05/10/16 19:18:13 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. Parsons (GSFC), S. Barthelmy (GSFC), A. Beardmore (U. Leicester),
P. Boyd (GSFC), D. Burrows (PSU), J. Cummings (GSFC/NRC), N. Gehrels (GSFC),
O. Godet (U. Leicester), C. Gronwall (PSU), J. Kennea (PSU),
H. Krimm (GSFC/USRA), F. Marshall (GSFC), D. Palmer (LANL), T. Sakamoto (GSFC)
on behalf of the Swift team:

At 18:28:09 UT, Swift-BAT triggered and located GRB 051016B (trigger=159994).
The BAT on-board calculated location is RA,Dec 132.067d,+13.658d
{08h 48m 16s,+13d 39' 27"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  The BAT light curve shows a double peak
structure with a total duration of at least 15 sec -- the slew started at
T+15 sec, so determination of the full duration will have to wait until
after the full data set is downlinked.
+ Read more
October 16, 2005 GRB051016
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4096
SUBJECT: GRB051016: Swift detection of a burst
DATE:    05/10/16 06:07:36 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

P. Boyd (GSFC/UMBC), S. Barthelmy (GSFC), A. Beardmore (U. Leicester),                            
D. Burrows (PSU), N. Gehrels (GSFC), C. Gronwall (PSU), S.T. Holland (GSFC),
J. Kennea (PSU), C. Markwardt (GSFC/UMD), D. Palmer (LANL), T. Sakamoto (GSFC)
on behalf of the Swift team:

At 05:23:31 UT, Swift-BAT triggered and located GRB051016 (trigger=159913).
The BAT on-board calculated location is RA,Dec 122.811,-18.311d
{08h 11m 15s,-18d 18' 39"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  The BAT light curve shows
a single peak with a total duration of ~15 sec.  The peak count rate
was ~1200 counts/sec (15-350 keV), at ~2 seconds after the trigger.
+ Read more
October 12, 2005 GRB051012
ITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4093
SUBJECT: GRB 051012: Swift-BAT detection of burst yesterday
DATE:    05/10/13 22:15:40 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

G. Sato (ISAS), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/NRC), N. Gehrels (GSFC), D. Hinshaw (GSFC-SPSYS),
H. Krimm (GSFC/USRA), K. McLean (LANL), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC), J. Tueller (GSFC),
on behalf of the Swift-BAT team:

At 2005-10-12 17:05:58 UT, Swift-BAT triggered and detected GRB 051012
(trigger 159413).  Because Swift was executing a preplanned slew, the
burst was not identified onboard and no prompt notices were distributed.
Using the data set from T-4 to T+16, the refined BAT ground position is
RA, Dec 270.564d, -52.795d {18h 02m 15s, -52d 47' 40"} [deg; J2000],
+- 1.8 arcmin (radius, sys+stat, 90% containment). The burst was in the
fully-coded field of view.
+ Read more
October 8, 2005 GRB051008
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4069
SUBJECT: GRB051008: Swift-BAT detection of a bright burst
DATE:    05/10/08 17:13:00 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

F. Marshall (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC),
J. Norris (GSFC), M. Perri (ASDC), T. Sakamoto (GSFC)
on behalf of the Swift team:

At 16:33:21 UT, Swift-BAT triggered and located GRB051008 (trigger=158855).
The spacecraft did not slew immediately because of the Earth observing
constraint.  The burst will be observed by the NFIs at T+48 minutes
when it comes out of constraint.  The BAT on-board calculated location
is RA,Dec 202.870d,+42.090d {13h 31m 29s,+42d 05' 26"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve shows two main overlapping peaks with a total duration
of ~30 sec.  The peak count rate was ~7000 counts/sec (15-350 keV),
at ~4 seconds after the trigger.  This burst happened during a Malindi
telemetry down link session, so the TDRSS burst-related notices were delayed
in transmission until the end of the downlink pass (~10 min).
+ Read more
October 6, 2005 GRB051006
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4061
SUBJECT: GRB051006: Swift detection of a burst
DATE:    05/10/06 21:32:24 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. Norris (GSFC), S. Barthelmy (GSFC), D. Burrows (PSU), M. Capalbi (ASDC),
N. Gehrels (GSFC), S.T. Holland (GSFC), J. Kennea (PSU),
C. Markwardt (GSFC/UMD), F. Marshall (GSFC), D. Morris (PSU),
J. Nousek (PSU), C. Pagani (PSU), D. Palmer (LANL), P. Roming (PSU)
on behalf of the Swift team:

At 20:30:33 UT, Swift-BAT triggered and located GRB051006 (trigger=158593).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 110.830d,+9.531d {07h 23m 19s,+09d 31' 50"} (J2000), with an
uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve shows a multi-peak structure with a total duration
of ~20 sec.  The peak count rate was ~1500 counts/sec (15-350 keV),
at ~3 seconds after the trigger.
+ Read more
October 1, 2005 GRB051001
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4051
SUBJECT: GRB 051001:  Swift Detection of a Burst
DATE:    05/10/01 11:55:29 GMT
FROM:    Hans Krimm at NASA-GSFC  

A. Moretti (OAB), J. Cummings (GSFC-NRC),
N. Gehrels (GSFC), S. Hunsberger (PSU), H. Krimm (GSFC-USRA),
C. Markwardt (GSFC-UMD), F. Marshall (GSFC), D. Palmer (LANL),
P. Romano (OAB),  on behalf of the Swift team:

GRB 051001:  Swift Detection of a Burst

At 11:11:36 UT, Swift-BAT triggered and located GRB051001
(trigger=157870). The spacecraft slewed immediately, which in
this case was 75 seconds after the image trigger.  The BAT
on-board calculated location is RA,Dec 350.973d, -31.528d
{23h 23m 53s, -31d 31' 39"} (J2000), with an uncertainty
of 3 arcmin (radius, 90% containment, stat+sys).
+ Read more
September 25, 2005 GRB050925
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4034
SUBJECT: GRB050925: Swift-BAT detection of a short burst
DATE:    05/09/25 10:05:01 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S.T. Holland (GSFC/USRA), S. Barthelmy (GSFC), A. Beardmore (U. Leicester),
N. Gehrels (GSFC), J. Kennea (PSU), K. Page (U. Leicester),
D. Palmer (LANL), S. Rosen (MSSL)
on behalf of the Swift team:

At 09:04:33 UT, Swift-BAT triggered and located GRB050925 (trigger=156838).
The BAT on-board calculated location is RA,Dec 303.445d,+34.334d
{20h 13m 47s,+34d 20' 04"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  We note that the galactic latitude
is -0.1.  The BAT light curve shows a single-peak structure with a total
duration of less than 128 msec.
+ Read more
September 22, 2005 GRB050922c
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4013
SUBJECT: GRB 050822C: Swift detection of a bright burst
DATE:    05/09/22 21:05:45 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. Norris (GSFC), L. Barbier (GSFC), D. Burrows (PSU), A. Cucchiara (PSU),
J. Cummings (GSFC/NRC), N. Gehrels (GSFC), M. Goad (U. Leicester),
O. Godet (U. Leicester), S.T. Holland (GSFC/USRA), J. Kennea (PSU),
F. Marshall (GSFC), D. Palmer (LANL), T. Sakamoto (GSFC/NRC),
on behalf of the Swift team:

At 19:55:50 UT Swift-BAT triggered and located GRB 050922C (Trigger=156467)
and immediately slewed.  The BAT on-board calculated position is RA,Dec=
317.391d, -8.772d {21h 09m 34s, -08d 46' 17"} (J2000) with an uncertainty
of 3 arcmin (radius, 90% containment, stat+sys).  The TDRSS light curve
shows an intense GRB with a rising precursor starting at T-5 seconds,
followed by 5-second long main peak surmounted by three spikes.  The third
and most intense spike has a maximum count rate at T+1 sec of 15,000
counts/sec (15-350 keV).
+ Read more
September 22, 2005 GRB050922b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4008
SUBJECT: GRB050922B: Swift-BAT detection of a weak long burst
DATE:    05/09/22 16:13:40 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. Norris (GSFC), L. Barbier (GSFC), S. Barthelmy (GSFC), P. Boyd (GSFC),
D. Burrows (PSU), J. Cummings (GSFC/NRC), N. Gehrels (GSFC),
S.T. Holland (GSFC/USRA), J. Kennea (PSU), H. Krimm (GSFC/USRA),
F. Marshall (GSFC), O. Godet (U. Leicester), D. Palmer (LANL),
T. Sakamoto (GSFC)
on behalf of the Swift team:

At 15:02:00 UT, Swift-BAT triggered and located GRB050922B (trigger=156434).
This was an image trigger with a 168-sec duration.  The spacecraft slewed
immediately after the end of the image trigger.  The BAT on-board
calculated location is RA,Dec 5.800d,-5.599d {00h 23m 12s,-05d 35' 55"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
+ Read more
September 16, 2005 GRB050916
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3991
SUBJECT: GRB050916: Swift-BAT detection of a long weak burst
DATE:    05/09/16 17:22:48 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

D. Morris (PSU), D. Burrows (PSU), J. Cummings (GSFC/NRC), N. Gehrels (GSFC),
C. Gronwall (PSU), S. T. Holland (GSFC/UMBC), J. Kennea (PSU),
K. Page (U. Leicester), D. Palmer (LANL)
on behalf of the Swift team:

At 16:35:52 UT, Swift-BAT triggered and located GRB050916 (trigger=155408).
The spacecraft slewed immediately after processing the 120-second long
image.  The BAT on-board calculated location is RA,Dec 135.992d, -51.425d
{09h 03m 58s, -51d 25' 31"} (J2000), with an uncertainty of 3 arcmin (radius,
90% containment, stat+sys).  The BAT raw light curve showed one very broad
peak from T+0 to T+180 sec, with a spike at about T+40 to T+45 sec.
+ Read more
September 15, 2005 GRB050915b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3987
SUBJECT: GRB050915B: Swift-BAT detection of a long bright burst
DATE:    05/09/15 22:06:17 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

A. Falcone (PSU), A. Beardmore (U. Leicester), D. Burrows (PSU),
J. Cummings (GSFC/NRC), D. Fox (PSU), N. Gehrels (GSFC),
S. T. Holland (GSFC/UMBC), J. Kennea (PSU), H. Krimm (GSFC/USRA),
C. Pagani (PSU), D. Palmer (LANL), A. Parsons (GSFC), E. Rol (U. Leicester),
P. Roming (PSU), P. Shady (MSSL),
on behalf of the Swift team:

At 21:23:04 UT, Swift-BAT triggered and located GRB050915B (trigger=155284).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 219.096d,-67.405d  {14h 36m 23s, -67d 24' 16"} (J2000), with an
uncertainty of 3 arcmin (radius, 90% containment, stat+sys).  The BAT light
curve showed two broad bright peaks from T-10 to T+40 sec.
+ Read more
September 15, 2005 GRB050915
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3977
SUBJECT: GRB 050915: Swift detection of a GRB
DATE:    05/09/15 12:07:39 GMT
FROM:    David Palmer at LANL  

D. Grupe (PSU), A. Beardmore (U. Leicester), D. Burrows (PSU),
J. Cummings (GSFC/NRC), K. Page (U. Leicester), D. Palmer (LANL),
P. Roming (PSU), E. Rol (U. Leicester) N. Gehrels (GSFC)
on behalf of the Swift Team


At 11:22:42 UT, Swift-BAT triggered and located GRB050915
(trigger=155242).  The BAT on-board calculated location is
RA,Dec 81.714d, -28.030d {05h 26m 51s, -28d 01' 48"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
The BAT light curve showed a multi-peak structure with at least
4 well-separated peaks and a total duration of 25 sec.
+ Read more
September 11, 2005 GRB050911
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3961
SUBJECT: GRB050911: Swift-BAT detection of a long burst
DATE:    05/09/11 16:30:59 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift


K. Page (U. Leicester), M. Chester (PSU), J. Cummings (GSFC/NRC),
N. Gehrels (GSFC), J. Kennea (PSU), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), T. Sakamoto (GSFC),
on behalf of the Swift team:

At 15:59:34 UT, Swift-BAT triggered and located GRB050911
(trigger=154630).
The BAT on-board calculated location is RA,Dec 13.692, -38.861
{00h 54m 46s, -38d 51' 37"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).  The BAT light curve shows multi-
peaks with short peaks (< 500 msec) at T-1 sec and T+0 sec, and a
broader peak between T+10 to T+20 sec.
+ Read more
September 8, 2005 GRB050908
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3942
SUBJECT: GRB 050908: Swift detection of a burst
DATE:    05/09/08 06:28:38 GMT
FROM:    Hans Krimm at NASA-GSFC  

M. Goad (U. Leicester), H. Krimm (GSFC/USRA), D. Burrows (PSU),
M. Chester (PSU), N. Gehrels (GSFC), C. Markwardt (GSFC/UMD),
J. Osborne (U. Leicester), C. Pagani (PSU), K. Page (U. Leicester),
D. Palmer (LANL), A. Parsons (GSFC) on behalf of the Swift team:

At 05:42:31 UT, Swift-BAT triggered and located GRB050908
(trigger=154112). The BAT on-board calculated location is RA,Dec 20.464,
-12.971 {01h 21m 51s, -12d 58' 16"} (J2000), with an uncertainty of
3 arcmin (radius, 90% containment, stat+sys).  The BAT light curve shows
a roughly triangular shape with a possible two peaks and total duration
of ~25 seconds.
+ Read more
September 6, 2005 GRB050906
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3926
SUBJECT: GRB 050906: Swift/BAT Detection of a possible burst
DATE:    05/09/06 11:10:45 GMT
FROM:    Hans Krimm at NASA-GSFC  

H. Krimm (GSFC/USRA), V. La Parola (IASF-CNR), M. de Pasquale (MSSL),
S. Barthelmy (GSFC), A. Blustin (MSSL) , D. Burrows (PSU),
N. Gehrels (GSFC), C. Gronwall (PSU), C. Pagani (PSU),  K. Page (U. Leicester)
on behalf of the Swift team:

At 10:32:05 UT, Swift-BAT triggered and located GRB050906 (trigger=153866).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 52.803d, -14.625d {+03h 31m 13s, -14d 37' 30"} (J2000), with an
uncertainty of 3 arcmin (radius, 90% containment, stat+sys).  This was a
64-msec trigger.  The BAT TDRSS light curve shows hints of emission, but it is
not possible to separate source variations from background variations
at this early stage in the analysis.  Given that this is at high galactic
latitude, we believe this is a burst rather than a hard x-ray transient.
+ Read more
September 4, 2005 GRB050904
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3910
SUBJECT: GRB050904: Swift-BAT detection of a probable burst
DATE:    05/09/04 03:07:21 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. Cummings (GSFC/NRC), L. Angelini (GSFC), S. Barthelmy (GSFC), A. Cucchiara (PSU),
N. Gehrels (GSFC), C. Gronwall (PSU), S.T. Holland (GSFC), V. Mangano (INAF-IASF),
F. Marshall (GSFC), C. Pagani (PSU), D. Palmer (LANL)
on behalf of the Swift team:

At 01:51:44 UT, Swift-BAT triggered and located GRB050904 (trigger=153514).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 13.670d,+14.138d {00h 54m 41s,+14d 08' 17"} (J2000), with an
uncertainty of 3 arcmin (radius, 90% containment, stat+sys).  This was a 64-sec
image trigger.  The BAT light curve shows hints of emission, but it is
not possible to separate source variations from background variations
at this early stage in the analysis.  Given that this is at high galactic
latitude, we believe this is a burst rather than a hard x-ray transient.
There is nothing in SIMBAD nor in the BAT Active Source list near this location.
+ Read more
August 27, 2005 GRB050827
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3894
SUBJECT: GRB 05027: Swift-BAT refined analysis
DATE:    05/08/27 23:39:07 GMT
FROM:    Hans Krimm at NASA-GSFC  

T. Sakamoto (GSFC/NRC), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hinshaw (GSFC-SPSYS), D. Hullinger (UMD), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), K. McLean (LANL), D. Palmer (LANL),
A. Parsons (GSFC),  G. Sato (ISAS),  J. Tueller (GSFC),
on behalf of the Swift-BAT team:

Using the full data set from T-300 to T+300 sec from the recent telemetry
downlink, we report further analysis of Swift-BAT GRB 050827
(trigger #152325) (Capalbi, et al., GCN 3893).  The refined BAT ground
position is (RA,Dec) = 64.297,+18.217 {04h 17m 11s, +18d 13' 01"}
[deg; J2000] +-1.3 arcmin, (90% containment).
+ Read more
August 26, 2005 GRB050826
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3884
SUBJECT: GRB050826: Swift-BAT detection of a long burst
DATE:    05/08/26 07:02:02 GMT
FROM:    Craig Markwardt at NASA/GSFC/UMD  

V. Mangano (INAF-IASF), L. Barbier (GSFC), A. Blustin (UCL-MSSL),
D. Burrows (PSU), J. Cummings (GSFC), S. Hunsberger (PSU),
C. Markwardt (GSFC/UMD), D. Morris (PSU), K. Page (U. Leicester),
D. Palmer (LANL), on behalf of the Swift team:

At 06:18:10 UT, Swift-BAT triggered and located GRB 050826
(trigger=152113).  The spacecraft slewed immediately.  The BAT
on-board calculated location is RA,Dec 87.729, -2.680 {+05h 50m 55s,
-02d 40' 46"} (J2000), with an uncertainty of 3 arcmin (radius, 90%
containment, stat+sys).  The BAT light curve shows two peaks (T+10
sec and T+30 sec) with a total duration of 45 sec.  The peak count
rate was ~800 counts/sec (15-350 keV), at ~10 sec after the trigger.
+ Read more
August 24, 2005 GRB050824
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3866
SUBJECT: GRB050824: Swift-BAT detection of a burst
DATE:    05/08/25 00:31:30 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. Campana (INAF-OAB), S. Barthelmy (GSFC), D. Burrows (PSU),
J. Cummings (GSFC/NRC), N. Gehrels (GSFC), S. Hunsberger (PSU),
M. Ivanushkina (PSU), F. Marshall (GSFC), D. Palmer (LANL),
G. Tagliaferri (INAF-OAB),
on behalf of the Swift team:

At 23:12:16 UT, Swift-BAT triggered and located GRB050824 (trigger=151905).
This was a 64-sec image trigger.  The spacecraft did not automatically slew
due to proximity to the moon (25 degrees).  Hence there will be no immediate
results from XRT or UVOT.  However, a TOO is being planned for this target.
The BAT on-board calculated location is RA,Dec 12.237d,+22.592d
{00h 48m 57s,+22d 35' 31"} (J2000), with an uncertainty of 3 arcmin
(radius, 90% containment, stat+sys).
+ Read more
August 22, 2005 GRB050822
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3849
SUBJECT: GRB 050822: Swift detection of a long burst
DATE:    05/08/22 04:29:32 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

A. Blustin (UCL-MSSL), S. Barthelmy (GSFC), D. Burrows (PSU), M. Chester (PSU),
J. Cummings (GSFC/NRC), N. Gehrels (GSFC), J. Kennea (PSU), F. Marshall (GSFC),
D. Palmer (LANL), T. Sakamoto (GSFC)
on behalf of the Swift team:

At 03:49:29 UT, Swift-BAT triggered and located GRB050822 (trigger=151486).
The BAT on-board calculated location is RA,Dec 51.080d,-46.023d
{03h 24m 19s,-46d 01' 22"} (J2000), with an uncertainty of 2 arcmin
(radius, 90% containment, stat+sys).  The BAT light curve shows two peaks
(at T+5 sec and T+50 sec) with a total duration of 70 sec.
+ Read more
August 20, 2005 GRB050820b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3839
SUBJECT: GRB050820B: BAT-Swift detection of a bright GRB
DATE:    05/08/21 00:23:42 GMT
FROM:    David Palmer at LANL  

M. Page (UCL-MSSL), D. Palmer (LANL), S. Barthelmy (GSFC),
D. Burrows (PSU), A. Beardmore (U. Leicester). J. Kennea (PSU),
M. Chester (PSU), and T. Sakamoto (GSFC/NRC)
on behalf of the Swift team report

At 23:50:27 BAT triggered and located GRB050820B (Trigger= 151334)
at RA,Dec=135.557d, -72.668d {+09h 02m 14s, -72d 40' 03"} (J2000)
with an uncertainty of 2 arcmin (radius, 90% containment, stat+sys).
The BAT lightcurve shows 20 seconds of emission with a shorter
softer peak at T+2 seconds, and a broader, brighter, harder
interval of emission from T+6 to T+14s.
+ Read more
August 20, 2005 GRB050820a
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3830
SUBJECT: GRB 050820: Swift detection of a GRB
DATE:    05/08/20 07:29:30 GMT
FROM:    David Burrows at PSU/Swift  

M. Page (UCL-MSSL), D. Burrows (PSU), A. Beardmore (U. Leicester), D.
Palmer (LANL),
J, Kennea (PSU), N. Gehrels (GSFC), C. Markwardt (GSFC/UMD), K. Page (U.
Leicester),
T. Sakamoto (GSFC/NRC), M. Chester (PSU), P. Boyd (GSFC) report on behalf
of the Swift team:

At 06:34:53 BAT triggered, located, and immediately slewed to GRB
050820 (trigger=151207).  The BAT on-board calculated position is
RA,Dec 337.400d, +19.578d {22h 29m 36s, 19d 34' 42"} (J2000) with an
uncertainty of 2 arcmin (radius, 90% containment, stat+sys).  The BAT
light curve shows a broad double-humped structure about 20 seconds
long, with peaks around T+1s and T+14 s, with a peak count rate
of ~1500 counts  per second (15-350 keV) at ~1 second after the trigger.
+ Read more
August 19, 2005 GRB050819
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3826
SUBJECT: GRB050819: Swift-BAT detection of a weak burst
DATE:    05/08/19 17:23:53 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

M. De Pasquale (MSSL), S. Barthelmy (GSFC), A.P. Beardmore (U Leicester),
D. Burrows (PSU), M. Chester (PSU), A. Cucchiara (PSU), J. Cummings (GSFC/NRC),
N. Gehrels (GSFC), M.R. Goad (U Leicester), J. Kennea (PSU), H. Krimm (GSFC/USRA),
S.T. Holland (GSFC/USRA), S. Hunsberger (PSU), F. Marshall (GSFC),
C. Markwardt (GSFC/UMD), J.P. Osborne (U Leicester), K.L. Page (U Leicester),
D. Palmer (LANL), A. Parsons (GSFC), P. Roming (PSU), T. Sakamoto (GSFC),
M. Still (GSFC)
on behalf of the Swift team:

At 16:23:55 UT, Swift-BAT triggered and located GRB050819 (trigger 151131).
The BAT on-board calculated location is RA,Dec 358.735d,+24.854d
{23h 54m 56s,+24d 51' 13"} (J2000), with an uncertainty of 2 arcmin
(radius, 90% containment, stat+sys).  The BAT light curve
shows a very broad shallow peak of about 40 seconds duration.
+ Read more
August 15, 2005 GRB050815
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3811
SUBJECT: GRB050815: Swift-BAT detection of a burst
DATE:    05/08/15 18:13:31 GMT
FROM:    Derek Fox at CIT  

D. Fox (PSU), L. Barbier (GSFC), S. Barthelmy (GSFC), D. Burrows
(PSU), J. Cummings (GSFC/NRC), N. Gehrels (GSFC), O. Godet
(U. Leceister), S.T. Holland (GSFC/USRA), S. Hunsberger (PSU),
J. Kennea (PSU), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
F. Marshall (GSFC), D. Morris (PSU), D. Palmer (LANL), K. Page
(U. Leicester), A. Parsons (GSFC), P. Roming (PSU), T. Sakamoto
(GSFC), P. Schady (PSU/UCL-MSSL), & E. Rol (Leceister) report on
behalf of the Swift team:

At 17:25:19 UT, Swift-BAT triggered and located GRB050815
(trigger=150532).  The BAT on-board calculated location is RA,Dec
293.575d,+9.166d {19h 34m 18s,+09d 09' 59"}, with an uncertainty of 2
arcmin (radius, 90% containment, stat+sys).  The BAT light curve shows
two peaks in 5 sec and possible low energy emission out to ~30 sec.
+ Read more
August 14, 2005 GRB050814
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3799
SUBJECT: GRB 050814: Swift detection of a burst
DATE:    05/08/14 12:35:37 GMT
FROM:    David Burrows at PSU/Swift  

A. Retter (PSU), L. Barbier (GSFC), S. Barthelmy (GSFC), A. Blustin
(UCL-MSSL), D. Burrows (PSU), C. Markwardt (GSFC/UMD), F. Marshall (GSFC),
D. Morris (PSU), D. Palmer (LANL), J. Racusin (PSU), P. Roming (PSU), and
N. Gehrels (GSFC) report on behalf of the Swift team:

At 11:38:57 UT, Swift-BAT triggered and located GRB050814
(trigger=150314).  The BAT on-board calculated location is
RA,Dec 264.204,+46.333, {+17h 36m 49s, +46d 19' 58"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment,
stat+sys).
+ Read more
August 13, 2005 GRB050813
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3788
SUBJECT: GRB 050813: Possible Short Swift-BAT GRB
DATE:    05/08/13 08:06:42 GMT
FROM:    Craig Markwardt at NASA/GSFC/UMD  

A. Retter (PSU), L. Barbier (GSFC), S. Barthelmy (GSFC), A. Blustin (MSSL),
D. Burrows (PSU), A. Cucchiara (PSU), N. Gehrels (GSFC),
O. Godet (U. Leicester), J. Kennea (PSU), C. Markwardt (GSFC/UMD),
D. Morris (PSU), D. Palmer (LANL), J. Racusin (PSU), P. Roming (PSU)
on behalf of the Swift team, report:

At 06:45:09.8 UT, Swift-BAT triggered and located GRB050813
(trigger=150139).  The spacecraft slewed immediately.  The BAT
on-board calculated location is RA,Dec 242.010, +11.252 {+16h 08m 02s,
+11d 15' 07"} (J2000), with an uncertainty of 3 arcmin (radius,
90% containment, stat+sys).  There is a single peak with an
approximate duration of 0.7 sec FWHM.  The peak rate is approx 2000
ct/s in the 15-350 keV band.
+ Read more
August 3, 2005 GRB050803
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3748
SUBJECT: GRB050803: Swift-BAT detection of a very long burst
DATE:    05/08/03 20:10:23 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D.L. Band (GSFC-UMBC), S. Barthelmy (GSFC), P. Boyd (GSFC-UMBC), P. Brown (PSU),
D. Burrows (PSU), M. Chester (PSU), J. Cummings (GSFC/NRC), N. Gehrels (GSFC),
C. Markwardt (GSFC), J. Nousek (PSU), K. Page (U. Leicester), C. Pagani (PSU),
D. Palmer (LANL), T. Sakamoto (GSFC), J. Racusin (PSU)
on behalf of the Swift team:

At 19:14:00 UT, Swift-BAT triggered and located GRB050803 (trigger=148833).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 350.650d,+5.800d {23h 22m 36s,+05d 48' 00"} (J2000), with an
uncertainty of 3 arcmin (radius, 90% containment, stat+sys).  The BAT light
curve shows a multi-peak structure with a total duration of at least 150 sec.
+ Read more
August 2, 2005 GRB050802
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3734
SUBJECT: GRB 050802: Swift Gamma-ray Burst
DATE:    05/08/02 11:53:01 GMT
FROM:    David L. Band at NASA/GSFC  

D. Band (GSFC-UMBC), C. Markwardt (GSFC-UMD), M. Perri
(ASDC), K. McGowan (MSSL), C. Gronwall (PSU), K. Page (U.
Leicester), J. Racusin (PSU), D. Burrows (PSU), N. Gehrels
(GSFC), J. Kennea (PSU), report on behalf of the Swift
Team:

At 10:08:02 UT, Swift-BAT triggered and located GRB050802
(trigger=148646).  The spacecraft slewed immediately.  The
BAT on-board calculated location is RA,Dec 219.287, +27.806
{+14h 37m 09s, +27d 48' 23"} (J2000), with an uncertainty
of 3 arcmin (radius, 90% containment, stat+sys).
+ Read more
August 1, 2005 GRB050801
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3725
SUBJECT: GRB050801: Swift-BAT detection of a burst
DATE:    05/08/01 19:25:50 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D.L. Band (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC),
N. Gehrels (GSFC), C. Gronwall (PSU) S. Hunsberger (PSU),
J. Kennea (PSU), D. Palmer (LANL), M. Perri (ASDC)
on behalf of the Swift team:

At 18:28:02.07 UT, Swift-BAT triggered and located GRB050801 (trigger=148522).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 204.139d,-21.950d {+13h 36m 33s,-21d 57' 00"} (J2000), with an
uncertainty of 3 arcmin (radius, 90% containment, stat+sys).  The BAT
light curve shows a single FRED structure with a total duration of 3 sec.
+ Read more
July 30, 2005 GRB050730
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3704
SUBJECT: GRB050730: Swift-BAT detection of a weak burst
DATE:    05/07/30 21:00:41 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S.T. Holland (GSFC/USRA), S. Barthelmy (GSFC), D.N. Burrows (PSU),
C. Gronwall (PSU), J. Kennea (PSU), N. Gehrels (GSFC), D. Palmer (LANL),
A. Parsons (GSFC), P. Schady (MSSL),
on behalf of the Swift team:

At 19:58:23 UT, Swift-BAT triggered and located GRB050730 (trigger=148225).
The spacecraft slewed immediately.  The BAT on-board calculated location
is RA,Dec 212.065d,-3.762d {14h 08m 16s,-03d 45' 41"} (J2000), with an
uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
+ Read more
July 26, 2005 GRB050726
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3682
SUBJECT: GRB050726: Swift-BAT detection of a weak burst
DATE:    05/07/26 13:08:21 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. Barthelmy (GSFC), D. Palmer (LANL), T. Sakamoto (GSFC), S. Holland
(GSFC), D. Burrows (PSU), M. Chester (PSU), S. Hunsberger (PSU), A. Moretti
(OAB), S. Covino (OAB), P. Romano (OAB), A. Antonelli (INAF-OAR), T. Poole
(MSSL), N. Gehrels (GSFC) on behalf of the Swift team:

At 05:00:17 UT, Swift-BAT triggered and located GRB050726
(trigger=147788).  The spacecraft slewed immediately.  But since there was
a gap in the TDRSS coverage at the moment of the burst, the TDRSS messages
were lost, and therefore there were no real-time GCN notifications.
The following comes from the analysis of the full data set after the
regularly scheduled data downlink pass.  The BAT ground-calculated
location is RA,Dec 200.052,-32.072 {13h 20m 12s,-32d 04' 19"} (J2000),
with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys).
+ Read more
July 24, 2005 GRB050724
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3665
SUBJECT: GRB050724: a short-burst detected by Swift
DATE:    05/07/24 13:34:04 GMT
FROM:    Stefano Covino at Brera Astronomical Observatory  

S. Covino (INAF/OAB), L.A. Antonelli (INAF/OAR), P. Romano (INAF/OAB),
D. Palmer (LANL), C. Markwardt(GSFC, UMd), D. Burrows (PSU), N. Gehrels
(GSFC), S. Barthelmy (GSFC), M. Chester (PSU), S. Hunsberger (PSU), J.
Cummings (GSFC/NRC) on behalf of the Swift team

At 12:34:09 UT, Swift-BAT triggered and located GRB050724
(trigger=147478). The spacecraft slewed immediately. The BAT on-board
calculated location is RA,Dec 246.214, -27.524 {+16h 24m 51s, -27d 31'
25"} (J2000), with an uncertainty of 3 arcmin (radius, 90% containment,
stat+sys). The light curve appears to be short, with full-width half
maximum of less than 0.25 sec, and a peak rate of 10,000 ct/s in that
interval.
+ Read more
July 21, 2005 GRB050721
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3654
SUBJECT: GRB050721A: Swift-BAT detection of a weak burst
DATE:    05/07/21 06:04:14 GMT
FROM:    Angelo Antonelli at Obs. Astro. di Roma  

GRB050721A: Swift-BAT detection of a weak burst

L.A. Antonelli (INAF/OAR), K. Page (U. Leicester), D. Morris (PSU), P.
Romano (INAF/OAB), N. Gehrels (GSFC), P. Roming (PSU), P. Schady
(MSSL), G. Tagliaferri (INAF/OAB) S. Barthelmy (GSFC), H. Krimm
(GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), on behalf of
the Swift team:

At 04:29:14.28 UT, Swift-BAT triggered and located GRB050721
(trigger=146970). The spacecraft slewed immediately. The BAT on-board
calculated location is RA, Dec 253.445d,-28.390d {+16h 53m 47s,-28d 23'
22"} (J2000), with an uncertainty of 3 arcmin (radius, 90% containment,
stat+sys). The BAT light curve shows a peak with a total duration of
~10 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~5
seconds after the trigger.
+ Read more
July 17, 2005 GRB050717
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3633
SUBJECT: Swift detection of GRB 050717
DATE:    05/07/17 11:28:50 GMT
FROM:    Cheryl Pauline Hurkett at Leicester U  

C. Hurkett, K. Page, (U. Leicester), J. Kennea, D. Burrows (PSU), A.
Blustin (MSSL), L. Barbier (GSFC), C. Markwardt (GSFC/UMd), A. Parsons
(GSFC) and N. Gehrels (GSFC) report on behalf of the Swift team;

At 10:30:52.21 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB 050717 (trigger # 146372). The BAT on-board
calculated location is RA, Dec 214.332, -50.539 (14h 17m 20s, -50d 32'
21") (J2000) with an uncertainty of 3 arcmin (radius, 4-sigma, including
estimated systematic uncertainty). The BAT light curve showed an initial
spike, then a strong peak followed by a decay out to about 20 seconds
(FRED). The peak count rate was measured by BAT to be ~16000 counts/sec at
T+4 sec in the 15 - 350 keV band.
+ Read more
July 16, 2005 GRB050716
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3623
SUBJECT: Swift/BAT detection of GRB 050716
DATE:    05/07/16 13:34:23 GMT
FROM:    Evert Rol at U.Leicester  

E. Rol, C. Hurkett, K. Page (U. Leicester), S. Barthelmy, L. Barbier,
A. Parsons (GSFC), J. Cummings (NRC, GSFC), D. Palmer (LANL),
D. Burrows, J. Kennea (PSU), K. McGowan (MSSL), N. Gehrels (GSFC),
report for the Swift team:

At 12:36:04 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 050716 (trigger=146227).  The BAT on-board calculated
location is RA,Dec 338.598d {+22h 34m 23s}, +38.696d {+38d 41' 46"}
(J2000), with an uncertainty of 4 arcmin (radius, including estimated
systematic uncertainty; 90% containment).  The BAT light curve showed
a multi-peak structure with a duration of at least 40 seconds.  The
15-350 keV peak count rate was ~1300 counts/sec, measured by BAT at
~10 seconds after the trigger.
+ Read more
July 15, 2005 GRB050715
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3621
SUBJECT: GRB 050715: Swift-BAT detection
DATE:    05/07/15 23:17:11 GMT
FROM:    Jochen Greiner at MPI  

J. Greiner (MPE), S. Barthelmy (GSFC), H. Krimm (GSFC/USRA),
D. Palmer (LANL), A. Parsons (GSFC),  on behalf of the Swift-BAT team:

At 22:30:26.42 UT, the Swift-BAT instrument triggered (trigger=146129)
on GRB 050715.  The spacecraft did not slew to this new burst
because of the Sun observing constraint (and it will remain in constraint
for 2-3 months).  The BAT flight-determined location is RA,Dec 155.669,-0.059
{+10h 22m 41s, -00d 03' 31"} (J2000) with a 3 armin uncertainty (radius,
90% containment, stat+sys).  The lightcurve has two main peaks separated
by ~35 sec with a total duration of ~70 sec.  There is some evidence
of 1 or 2 more smaller peaks.  The peak count rate is ~1400 cnts/sec
in the 15-350 keV band.
+ Read more
July 14, 2005 GRB050714b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3613
SUBJECT: Swift detection of a long transient (GRB 050714B?)
DATE:    05/07/15 00:25:37 GMT
FROM:    Andrew Levan at U.of Leicester  

A. Levan, A. Beardmore, K. Page, J. Osborne, E. Rol (U. Leicester)
S. Barthelmy, J. Cannizzo (GSFC-UMBC), L. Cominsky (Sonoma State U.),
H. Krimm (GSFC), C. Markwardt (GSFC/UMD), D. Palmer (LANL), T. Sakamoto
(GSFC), C. Gronwall, D. Burrows, P. Roming, J. Kennea (PSU) and N. Gehrels
(GSFC) report for the Swift team.

At 22:40:32 UT, Swift-BAT triggered (trigger=145994) and located on-board
a source.  The flight-determined location is RA,Dec 169.694, -15.528 {+11h
18m 47s, -15d 31' 39"} (J2000) with an uncertainty of 3 arcmin (radius,
90% containment, stat+sys).
+ Read more
July 13, 2005 GRB050713b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3590
SUBJECT: GRB 050713B
DATE:    05/07/13 13:09:51 GMT
FROM:    Simon Vaughan at Leicester U/BA  

S. Vaughan (Leicester), A. Falcone (PSU), D. Palmer (LANL),
A. Blustin (MSSL), S. Barthelmy (GSFC), J. Cummings
(GSFC/NRC), H. Krimm (GSFC/USRA), D. Burrows, D. Morris, C.
Gronwall (PSU), C. Markwardt (GSFC/UMD), K. Page, M. Goad
(Leicester), S Rosen (MSSL), N. Gehrels (GSFC)

At 12:07:17.62 UT, the Swift Burst Alert Telescope (BAT)
triggered and located on-board GRB050713B (trigger=145754).
The spacecraft slewed immediately.  The flight-determined
location is RA,Dec 307.843,+60.920 {20h 31m 22s,+60d 55'
12"} (J2000) with an uncertainty of 3 arcmin (radius, 90%
c.l. stat+sys).
+ Read more
July 13, 2005 GRB050713
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3581
SUBJECT: GRB 050713: Swift detection of Bright Burst
DATE:    05/07/13 05:31:34 GMT
FROM:    Abe Falcone at PSU/Swift  

A. Falcone (PSU), D. Palmer (LANL), A. Blustin (MSSL), S. Barthelmy
(GSFC), J. Cummings (GSFC/NRC), H. Krimm (GSFC/USRA), D. Burrows, D.
Morris, C. Gronwall (PSU), C. Markwardt (GSFC/UMD), K. Page
(Leicester), N. Gehrels (GSFC)

At 04:29:02.39 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB050713 (trigger=145675).  The spacecraft slewed
immediately and was on target at approximately 70 seconds. The
flight-determined location is RA,Dec 320.536,+77.072 {+21h 22m 09s, +77d
04' 20"} (J2000) with an uncertainty of 3 arcmin (radius, stat+sys).
+ Read more
July 12, 2005 GRB050712
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3573
SUBJECT: GRB 050712: Swift detection of a weak burst
DATE:    05/07/12 15:04:45 GMT
FROM:    David Burrows at PSU/Swift  

D. Grupe (PSU), S. Barthelmy (GSFC), J. Cummings, (GSFC/NRC),
H. Krimm (GSFC/USRA), C. Markwardt, (GSFC/UMD), D. Palmer (LANL),
T. Sakamoto (GSFC), D. Burrows, J. Nousek, A. Falcone, C. Gronwall (PSU),
T. Poole, A. Blustin (MSSL), and N. Gehrels (GSFC) on behalf of the Swift team:


At 14:00:27.51 UT, the Swift Burst Alert Telescope (BAT) triggered and located
on-board GRB050712 (trigger=145581).  The spacecraft slewed immediately.
The flight-determined location is RA,Dec 77.693,+64.899 {+05h 10m 46s,+64d
53' 56"} (J2000) with an uncertainty of 3 arcmin (radius, stat+sys).
+ Read more
July 1, 2005 GRB050701
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3556
SUBJECT: Swift trigger 143708 is really GRB 050701
DATE:    05/07/01 12:38:19 GMT
FROM:    Hans Krimm at NASA-GSFC  

P. Boyd (GSFC/UMBC),  L. Barbier (NASA GSFC),
D. Burrows (PSU), N. Gehrels (NASA GSFC), M. Goad (Leicester),
C. Hurkett (Leicester), M. Ivanushkina (PSU), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD),  K. Page (Leicester U), D. Palmer (LANL),
A. Parsons (NASA GSFC), T. Poole (MSSL), P. Roming (PSU)


At 11:42:59 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB050701(trigger=143708).   The BAT on-board
calculated location is RA,Dec 227.287d  -59.419d
{+15h 09m 09s, -59d 25' 06"} (J2000) with an uncertainty of 3 arcmin
(radius, 3-sigma, including estimated systematic uncertainty).
+ Read more
June 7, 2005 GRB050607
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3525
SUBJECT: GRB050607: Swift Detection of a long GRB
DATE:    05/06/07 12:07:33 GMT
FROM:    Alon Retter at PSU  

A. Retter, J. Racusin, J. Kennea, D. Burrows (PSU), D. Palmer (LANL),
K. McGowan (MSSL), J. Cummings (NRC/GSFC), S. Barthelmy, N. Gehrels
(GSFC)

on behalf of the Swift Team report:

At 09:11:23 UT the Swift-BAT triggered on GRB 050607 (trigger 132247).
The BAT refined ground position is RA, Dec 300.167, +9.137 (J2000)
{20h00m40s, +09d 08' 13"}.
+ Read more
June 3, 2005 GRB050603
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3509
SUBJECT: Swift/BAT Detection of GRB050603
DATE:    05/06/03 08:11:03 GMT
FROM:    David Palmer at LANL  

A. Retter (PSU), A. Parsons, N. Gehrels (GSFC), C. Gronwall (PSU),
C. B. Markwardt (GSFC/UMD),  D. Palmer (LANL)

on behalf of the Swift Team report:

At 06:29:05 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB050603 (trigger=131560).   The BAT on-board calculated
location is RA,Dec  39.978 (+02h 39m 55s), -25.183 (-25d 10' 57")
(J2000) with an uncertainty of 4 arcmin (radius, 3-sigma, including
estimated systematic uncertainty).
+ Read more
May 28, 2005 GRB050528
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3502
SUBJECT: Swift-BAT GRB 050528: a soft burst
DATE:    05/05/28 19:48:57 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

J. Cummings (GSFC/NRC), L. Barbier, S. Barthelmy (GSFC),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD),
H. Krimm (GSFC/USRA), C. Markwardt, (GSFC/UMD), D. Palmer (LANL),
A. Parsons (GSFC), T. Sakamoto (GSFC), G. Sato (ISAS), M. Suzuki (Saitama),
T. Takahashi (ISAS), J. Tueller (GSFC)
on behalf of the Swift-BAT team:

The full data set has been delivered (GCN 3501).
Analysis of the data has allowed us to determine that Trigger 130649
at 04:06:45 UT (GCN 3496) is a real GRB.  The ground-analysis position
is RA,Dec 353.515,+45.938 (J2000) with an uncertainty of 3 arcmin
(radius, 90%, statistical plus systematic).
+ Read more
May 25, 2005 GRB050525
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3466
SUBJECT: GRB 050525: Swift Detection of a Bright, Possibly Short Burst
DATE:    05/05/25 01:36:14 GMT
FROM:    David L. Band at NASA/GSFC  

D. Band (GSFC/UMBC), J. Cummings (GSFC/NRC), M. Perri
(ASDC), S. Holland (GSFC/USRA), D. N. Burrows (PSU), N.
Gehrels (GSFC), J. E. Hill, J. A. Kennea, S. Hunsberger
(PSU), C. Markwardt (GSFC/UMD), D. Palmer (LANL) on behalf
of the Swift Team.

At 00:02:53 UT, the BAT instrument on the Swift spacecraft
triggered (trigger=130088) and located GRB 050525.  The BAT
on-board calculated location is RA,Dec 278.144 , +26.340
(18h 32m 35s +26d 20' 23") (J2000) with an uncertainty of 3
arcmin (radius, 3-sigma, including systematic uncertainty).
This is a very bright burst, yielding about 1500 counts
over background in 64 ms (preliminary) in the 25-100 keV
range in the BAT instrument.
+ Read more
All GCNs on GRB 050525A
May 9, 2005 GRB050509b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3381
SUBJECT: Swift Detection of GRB050509b: A short duration burst
DATE:    05/05/09 05:03:23 GMT
FROM:    Louis M Barbier at NASA/GSFC/Swift  

C. Hurkett, E. Rol, (U Leicester), L. Barbier (GSFC), S. Barthelmy (GSFC),
A. Blustin (MSSL), D. Burrows (PSU),  J. Cummings (GSFC/NRC),
N. Gehrels (GSFC),  J. Kennea (PSU), C. Markwardt (GSFC/UMD), S. Holland
(GSFC/USRA) on behalf of the Swift Team;

At 04:00:19.23 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB050509b (trigger #118749).   The BAT on-board
calculated location is RA, dec 189.056, +29.000 (12h 36m 13s, +29d 00' 01'')
(J2000) with an uncertainty of 4 arcmin (radius, 3-sigma, including
estimated systematic uncertainty).
+ Read more
May 9, 2005 GRB050509
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3379
SUBJECT: Swift Detection of the Burst GRB050509
DATE:    05/05/09 02:47:54 GMT
FROM:    Cheryl Pauline Hurkett at Leicester U  

C. Hurkett, E. Rol, (U Leicester), L. Barbier (GSFC), S. Barthelmy (GSFC),
A. Blustin (MSSL), D. Burrows (PSU),  J. Cummings (GSFC/NRC),
N. Gehrels (GSFC),  J. Kennea (PSU), C. Markwardt (GSFC/UMD), on behalf of
the Swift Team;

At 01:46:28 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB050509 (trigger=118707).  The BAT on-board calculated
location is RA, Dec 310.588, +54.070 (J2000) with an uncertainty of 3
arcmin (radius, 3-sigma, including estimated systematic uncertainty).
+ Read more
May 7, 2005 GRB050507
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3378
SUBJECT: Swift-BAT detection of GRB 050507
DATE:    05/05/07 23:35:07 GMT
FROM:    Andrew Levan at U.of Leicester  

A. Levan (Leicester), L Barbier (GSFC), A. Blustin (MSSL),
C. Markwardt (GSFC), D. Palmer (LANL) on behalf of the Swift team.

At 22:43:18 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB050507   (trigger #118248).   The BAT on-board
calculated location is RA, dec 48.055,-11.073 (J2000) with an
uncertainty of 4 arcmin (radius, 3-sigma, including estimated
systematic uncertainty).
+ Read more
May 5, 2005 GRB050505
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3360
SUBJECT: Swift-BAT detection of GRB050505
DATE:    05/05/06 00:15:29 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

C. Hurkett (U. Leicester), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC),
N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), P. Shady (MSSL), J. Osborne (U. Leicester),
J. Kennea, D. Burrows (PSU)  for the Swift-team:

At 23:22:21 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB050505  (trigger #117504).   The BAT on-board
calculated location is RA, Dec 141.782, +30.255 (J2000) with an
uncertainty of 4 arcmin (radius, 3-sigma, including estimated
systematic uncertainty, 90% containment).
+ Read more
May 2, 2005 GRB050502b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3330
SUBJECT: Swift Detection of the Bright Burst GRB050502b
DATE:    05/05/02 10:42:36 GMT
FROM:    David Burrows at PSU/Swift  

A. Falcone, D. N. Burrows, M. Chester (PSU), P. Schady (MSSL),
J. Cummings (GSFC/NRC), D. Palmer (LANL), C. Pagani (PSU), B. Zhang (UNLV),
K. Page, M. Goad (U.Leicester), N. Gehrels (GSFC)

on behalf of the Swift Team.

At 09:25:40 UT, the Swift Burst Alert Telescope (BAT) triggered
and located GRB050502b (trigger=116116).   The BAT on-board
calculated location is RA, Dec = 142.543, +17.002
(09:30:10, +17:00:07) (J2000) with an uncertainty of
3 arcmin (radius, 3-sigma, including estimated
systematic uncertainty).
+ Read more
April 22, 2005 GRB050422
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3314
SUBJECT: Swift Detection of GRB 050422
DATE:    05/04/22 09:26:09 GMT
FROM:    Louis M Barbier at NASA/GSFC/Swift  

L. Barbier (GSFC), D. Palmer (LANL), D. Burrows (PSU), A. Blustin (MSSL),
H. Krimm (GSFC/USRA), N. Gehrels (GSFC), K. McGowan (MSSL),
M. Chester (PSU) 

At 07:52:40 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB050422  (trigger #115214).   The BAT on-board
calculated location is RA, dec 324.454, +55.799 (J2000) with an
uncertainty of 4 arcmin (radius, 3-sigma, including estimated
systematic uncertainty).
+ Read more
April 21, 2005 GRB050421
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3296
SUBJECT: Swift Detection of GRB050421
DATE:    05/04/21 05:52:28 GMT
FROM:    Louis M Barbier at NASA/GSFC/Swift  

L. Barbier (GSFC), D. Palmer (LANL), D. Burrows (PSU), A. Blustin (MSSL),
C. Markwardt (GSFC/UMd), N. Gehrels (GSFC), P. Roming (PSU)

At 04:11:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB050421 (trigger # 115135).   The BAT on-board
calculated location is RA, Dec 307.241, +73.665 (20:28:58, 73:39:54) 
(J2000) with an uncertainty of 4 arcmin (radius, 3-sigma, including estimated
systematic uncertainty).
+ Read more
April 18, 2005 GRB050418
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3288
SUBJECT: Swift-BAT detection of the bright and long GRB 050418 
DATE:    05/04/18 11:49:31 GMT
FROM:    Takanori Sakamoto at NASA/GSFC  

L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC), 
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD), 
K. Hurley (UC Berkeley), H. Krimm (GSFC/USRA), 
C. Markwardt (GSFC/UMD), F. Marshall (GSFC),  D. Palmer (LANL), 
A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), G. Sato (ISAS), 
M. Suzuki (Saitama), J. Tueller (GSFC) 
on behalf of the Swift-BAT team: 

At 11:00:34.6 UT Swift-BAT triggered on burst GRB 050418 
(trigger=114893).  The BAT flight position is RA,Dec=44.341,-18.538 
(J2000).
+ Read more
April 16, 2005 GRB050416b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3279
SUBJECT: Swift-BAT detection of GRB 050416b
DATE:    05/04/16 23:23:57 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

D. Hullinger (UMD), L. Barbier, S. Barthelmy (GSFC), J. Cummings (GSFC/NRC),
E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC/NRC), G. Sato (ISAS), M. Suzuki (Saitama),
J. Tueller (GSFC)
on behalf of the Swift-BAT team:

At 22:35:54.11 UT Swift-BAT triggered on burst GRB 050416b (trigger=114797).
The BAT flight position is RA,Dec=133.853,+11.173 (J2000).
+ Read more
April 16, 2005 GRB050416
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3264
SUBJECT: Swift BAT/XRT Detection of GRB 050416
DATE:    05/04/16 11:50:53 GMT
FROM:    Takanori Sakamoto at NASA/GSFC  

T. Sakamoto (GSFC/NRC), L. Barbier (GSFC), S. Barthelmy (GSFC),
D. Burrows (PSU), M. Chester (PSU), J. Cummings (GSFC/NRC),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (UMD),
J. Kennea (PSU) , H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), A. Parsons (GSFC), G. Sato (ISAS), M. Suzuki (Saitama),
M. Tripicco (GSFC-SSAI), J. Tueller (GSFC), D. Burrows (PSU),
on behalf of the Swift team:

At 11:04:44.5 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB050416 (trigger #114753).  The BAT on-board
calculated location is RA, dec 188.478, 21.043 (J2000) with an
uncertainty of 3.00 arcmin (radius, 3-sigma, including estimated
systematic uncertainty).
+ Read more
April 12, 2005 GRB050412
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3237
SUBJECT: Swift-BAT Detection of GRB 050412: A Bright, Long Burst
DATE:    05/04/12 07:21:04 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  

J. Cummings (GSFC/NRC), L. Barbier, S. Barthelmy (GSFC),
E. Fenimore (LANL), M. Galassi (LANL), N. Gehrels (GSFC),
D. Hullinger (UMD), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC/NRC), G. Sato (ISAS), M. Suzuki (Saitama), 
M. Tripicco (GSFC-SSAI), J. Tueller (GSFC), D. Burrows (PSU),
J. Kennea (PSU), V. Mangano (IASF-CNR) on behalf of the Swift team:

At 05:44:03 UT, Swift-BAT triggered on burst GRB 050412 
(trigger=114485) and began to slew 35 seconds after the trigger.
The BAT onboard position is RA, Dec = 181.120, -1.252 (J2000)
with an estimated error of <4 arcminutes.
+ Read more
April 10, 2005 GRB050410
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3218
SUBJECT: GRB 050410: Swift XRT Position
DATE:    05/04/10 14:44:05 GMT
FROM:    David Burrows at PSU/Swift  

V. La Parola, V. Mangano, T. Mineo, G. Cusumano  (INAF-IASF/Palermo), J. A. 
Kennea, D. N. Burrows  (PSU), C. Pagani,  P. Romano (INAF-OAB), J. P. 
Osborne, P. T. O'Brien (U. Leicester),  M. Capalbi, F. Tamburelli (ASDC), 
B. Zhang (U. Nevada), R. Fink, S. Barthelmy and N. Gehrels (GSFC), report 
on behalf of the Swift XRT team:

The Swift BAT instrument found Triggers 114298/114299 (possibly GRB 050410) 
at 12:14:25 UT on 10 April 2005.  The target was within the Swift Earth 
constraint and the observatory executed a delayed automated slew to the BAT 
position at 12:44:20.  The XRT began taking data at 12:46:27 UT, about 32 
minutes after the burst.  The afterglow was too faint for the XRT to 
produce an on-board centroid.  Ground processing shows a faint uncataloged 
X-ray source located at:

RA(J2000) = 05:59:12.9
Dec(J2000) = +79:36:9.2
+ Read more
April 6, 2005 GRB050406
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3180
SUBJECT: Swift-BAT detection of GRB 050406
DATE:    05/04/06 17:04:17 GMT
FROM:    Ann M. Parsons at NASA/GSFC/Swift  

A. Parsons (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (UMD), S. 
Hunsberger (PSU), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),  
D. Palmer (LANL), T. Sakamoto (GSFC/NRC), G. Sato (ISAS), M. Suzuki 
(Saitama), J. Tueller (GSFC) D. Burrows, J. Kennea, J. Nousek (PSU), 
G.  Chincarini, P. Romano (INAF-OAB) on behalf of the Swift team:

At 15:58:48.40 UT Swift-BAT triggered on burst GRB 050406 (trigger 
113872).  The BAT-derived position is RA,Dec= 34.428, -50.178 (J2000). 
Significant emission has been detected for at least 3 sec with possible 
low significance peaks over an additional 30 sec.
+ Read more
April 1, 2005 GRB050401
TITLE:   GCN GRB OBSERVATION REPORT                               
NUMBER:  3161                                                 
SUBJECT: GRB 050401: Prompt XRT position                   
DATE:    05/04/01 15:09:18 GMT                       
FROM:    David Burrows at PSU/Swift        

L. Angelini (GSFC), J. L. Racusin, S. Hunsberger, D. N. Burrows, J. E.
Hill, J. A. Kennea, D. C. Morris, D. Grupe, J. A. Nousek (PSU),
J. P.  Osborne, K. L. Page, M. R. Goad, A. P. Beardmore, O. Godet,
A. F. Abbey, A.  A. Wells (U. Leicester), S. Campana, A. Moretti,
C. Pagani,  P. Romano, G.  Tagliaferri, G. Chincarini (INAF-OAB),
G. Cusumano, V. La Parola, V.  Mangano, T. Mineo (INAF-IASF/Palermo),
P. Giommi, M. Capalbi, M. Perri, F.  Tamburelli (ASDC), F. Marshall,
N. White, N. Gehrels (GSFC), P. Roming, P.  Meszaros (PSU), P. Schady
(MSSL), report on behalf of the Swift XRT team:

The Swift BAT instrument triggered on GRB050401 at 14:20:15 UT and Swift
executed a prompt slew (delayed by 9 seconds due to an Earth constraint).
The XRT found a bright source located at the following position (based
on 38 counts in 2.5 seconds):

RA(J2000) = +16h 31m 29s, 
Dec(J2000) = +02d 11' 14"
+ Read more
March 26, 2005 GRB050326
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3143
SUBJECT: Swift-BAT detection of a bright GRB 050326
DATE:    05/03/26 13:50:55 GMT
FROM:    Craig Markwardt at NASA/GSFC/UMD  

C. Markwardt (GSFC/UMD), S. Barthelmy, L. Barbier (GSFC),
J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (UMD), H. Krimm (GSFC/USRA), D. Palmer (LANL),
A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), G. Sato (ISAS),
M. Suzuki (Saitama), M. Tashiro (Saitama U.), J. Tueller (GSFC),
N. White (GSFC), 
on behalf of the Swift team:

At 09:53:55 UT Swift-BAT detected trigger number 111453, a bright
burst designated GRB050326.  Due to a TDRSS-to-GCN problem there were
no real-time notices.  The BAT-derived position is (RA,Dec) =
6.857,-71.375 (J2000).
+ Read more
March 19, 2005 GRB050319
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3117
SUBJECT: Swift Detection of GRB 050319
DATE:    05/03/19 10:42:25 GMT
FROM:    Hans Krimm at NASA-GSFC  

Swift Detection of GRB 050319

H. Krimm (GSFC/USRA), M. Still (GSFC/USRA), S. Barthelmy, L. Barbier (GSFC),
S. Campana (INAF-OAB), M. Capalbi (ASDC), M. Chester (PSU), J. Cummings (GSFC/NRC), 
E. Fenimore (LANL), N. Gehrels (GSFC),  M. R. Goad, O. Godet (U.Leicester), 
J. Greiner (MPE), D. Grupe (PSU), D. Hullinger (GSFC/UMD), V. La Parola , 
V. Mangano (INAF-IASF/Palermo), C. Markwardt (GSFC/UMD), P. Meszaros, D. C. Morris, 
J. A. Nousek (PSU), K. Page (U.Leicester), D. Palmer (LANL), A. Parsons (GSFC), 
T. Sakamoto (GSFC/NRC), G. Sato (ISAS), M. Suzuki (Saitama), G.Tagliaferri (INAF-OAB), 
J. Tueller (GSFC) report on behalf of the Swift-BAT and Swift-XRT teams:

At 09:31:18.44 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB 050319.  The burst was 37 degrees off the BAT 
boresight.  The spacecraft executed an immediate slew and was on 
target by 09:32:45.53 UT at which time the XRT began taking data in 
Auto State.  On-board software recognized a bright source at location

RA 154.2016d {+10h 16m 48s} (J2000),
Dec  +43.5463d {+43d 32' 47"} (J2000)
+ Read more
March 18, 2005 GRB050318
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3111
SUBJECT: Swift-BAT detection of GRB 050318
DATE:    05/03/18 16:36:28 GMT
FROM:    Hans Krimm at NASA-GSFC  

H. Krimm (GSFC/USRA), S. Barthelmy, L. Barbier (GSFC),
J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (GSFC/UMD), C. Markwardt (GSFC/UMD), T. McMahon (Langston U.),
P. Meszaros (PSU), D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC/NRC), G. Sato (ISAS), M. Still (GSFC/USRA),
M. Suzuki (Saitama), M. Tripicco (GSFC-SSAI) J. Tueller (GSFC)
on behalf of the Swift-BAT team:

At 15:44:37 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB 050318.  The spacecraft did not automatically slew
to the burst location because of an observing constraint.  The orbit is such
that we just started the approximate 6-hour gap in telemetry downlink orbits,
so it will be ~7 hours before we get the full data set on this burst
and can say anything more than what is available from the real-time
TDRSS messages.

Using the time interval of the trigger of the burst (0.5 sec),
the ground-calculated location is RA,Dec 49.651,-46.392 (J2000)
with an uncertainty of 3 arcmin (radius, including a systematic uncertainty,
90% containment).
+ Read more
March 15, 2005 GRB050315
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3094
SUBJECT: Swift-BAT detection of GRB 050315
DATE:    05/03/15 21:55:41 GMT
FROM:    Ann M. Parsons at NASA/GSFC/Swift  

A. Parsons, S. Barthelmy, L. Barbier (GSFC), J. Cummings (GSFC/NRC),
E. Fenimore (LANL), R. Fink, N. Gehrels (GSFC), S. Holland (GSFC/USRA),
D. Hullinger (GSFC/UMD), K. Hurley (UCB), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), D. Palmer (LANL), S. Piranomonte (ASDC),
T. Sakamoto (GSFC/NRC), G. Sato (ISAS), A. Smale (NASA HQ), M. Suzuki 
(Saitama),
J. Tueller (GSFC)
on behalf of the Swift-BAT team:

At 20:59:42 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB 050315.  The spacecraft automatically slewed
to the burst location, and UVOT began automated observations.  XRT 
was not in a mode suitable for immediate position determination.

Using the time interval of the trigger of the burst, the 
ground-calculated location is RA,Dec 306.476,-42.591 (J2000) 
with an uncertainty of 3 arcmin (radius, including a systematic 
uncertainty, 90% containment).
+ Read more
March 6, 2005 GRB050306
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3071
SUBJECT: GRB 050306: Swift-BAT detection of a long burst
DATE:    05/03/06 04:48:27 GMT
FROM:    Craig Markwardt at NASA/GSFC/UMD  

C. Markwardt (GSFC/UMD), S. Barthelmy, L. Barbier, J. Cummings, (GSFC),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD),
H. Krimm (GSFC/USRA), F. Marshall (GSFC), P. Meszaros (PSU), D. Palmer (LANL),
A. Parsons (GSFC), M. Perri (ASDC), T. Sakamoto (GSFC), G. Sato (ISAS),
M. Suzuki (Saitama), T. Takahashi (ISAS), J. Tueller, N. White (GSFC)
on behalf of the Swift-BAT team:

At 03:33:12 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB 050306.  The burst location is 19 deg from the Moon,
and because of the Moon constraint, the spacecraft did not slew
to the burst location.

Using the time interval of the burst, the ground-calculated location
is RA,Dec 282.337,-9.162 (J2000) with an uncertainty of 3 arcmin
(radius, including a systematic uncertainty, 90% containment).
The burst was 51 degrees off the BAT boresight (19% encoding).
+ Read more
February 23, 2005 GRB050223
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3054
SUBJECT: GRB 050223: Swift XRT Position
DATE:    05/02/23 05:20:33 GMT
FROM:    David Burrows at PSU/Swift  

P. Giommi, M. Capalbi, M. Perri, F. Tamburelli (ASDC), G. Cusumano, V. 
Mangano, V. La Parola (INAF-IASF/Palermo), D. N. Burrows, J. A. Kennea, J. 
A. Nousek (PSU), K. L. Page, M. R. Goad (U. Leicester), P. Romano, G. 
Tagliaferri, G. Chincarini (INAF-OAB), N. Gehrels (GSFC), B. Zhang (U. 
Nevada), report on behalf of the Swift XRT team:

The Swift BAT instrument detected GRB 050223 at 03:09:06 UT on 23 Feb 
2005.  The GRB was located within the Earth angle constraint of the Narrow 
Field Instruments and the observatory was not able to slew to it at that 
time.  Swift executed an automated slew to the BAT position at 03:44 UT 
while the observatory was in the SAA.  The XRT began taking data at about 
03:57 UT after exiting the SAA.  The XRT was in Manual state and made 
observations in PCmode.  We find an uncataloged X-ray source located at:

RA(J2000) = 18h 05m 32.6s,
Dec(J2000) = -62d 28' 19.7"
+ Read more
February 19, 2005 - GRB050219b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3042
SUBJECT: GRB 050219b: Swift XRT Position
DATE:    05/02/20 00:29:56 GMT
FROM:    David Burrows at PSU/Swift  

D. N. Burrows, J. E. Hill, J. A. Kennea, J. L. Racusin (PSU), C. 
Pagani,  A. Moretti (INAF-OAB), O. Godet, A. F. Abbey (U. Leicester), V. La 
Parola (INAF-IASF/Palermo), F. Tamburelli (ASDC), K. Hurley (UC-Berkeley), 
B. Zhang (U. Nevada), D. Hinshaw, L. Angelini, N. White, N. Gehrels (GSFC), 
report on behalf of the Swift XRT team:

The Swift BAT instrument detected GRB 050219b at 21:05:51 UT on 19 February 
2005.  The burst was too close to the Earth limb to allow immediate 
observation by the XRT and UVOT.  The observatory executed an automated 
slew to the BAT position at 21:56:25 UT and the XRT began taking data at 
about 21:58 UT.  The XRT was in Auto state and attempted to obtain a GRB 
position, but the source was too faint to obtain a reliable on-board 
centroid.  The ground-processed centroid of this image gives an approximate 
source position of:

RA(J2000) = 05:24:26.5
Dec(J2000) = -57:47:51.3
+ Read more
February 19, 2005 - GRB050219
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3036
SUBJECT: GRB 050219: Prompt X-ray position
DATE:    05/02/19 13:35:10 GMT
FROM:    David Burrows at PSU/Swift  

P. Romano (INAF-OAB), M. Perri (ASDC), A. Beardmore (U. Leicester), V. 
Mangano (INF-IASF/Palermo), D. N. Burrows, J. E. Hill,  (PSU), B. Zhang (U. 
Nevada), and N. Gehrels (GSFC) report on behalf of the Swift XRT team:

The Swift BAT instrument detected a GRB at 12:40:01 UT on 19 February 
2005.  The observatory executed an automated slew to the BAT position and 
the XRT began taking data at 12:41:33.38 UT.  The XRT was in Auto state and 
reports a prompt position of:

GRB-RA= 166.41396, GRB-DEC= -40.68277

RA(J2000) = 11h 05m 39.4s

DEC(J2000) = -40:40:58.0
+ Read more
February 15, 2005 - GRB050215a and GRB050215b
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3024
SUBJECT: Swift-BAT detects two bursts: GRB050215a and GRB050215b
DATE:    05/02/15 04:45:33 GMT
FROM:    Scott Barthelmy at NASA/GSFC  

S. Barthelmy, L. Barbier, J. Cummings (GSFC), E. Fenimore (LANL),
N. Gehrels (GSFC), J. Greiner (MPE), D. Hinshaw (GSFC-SPSYS),
D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
T. Mitani (ISAS), K. Nakazawa (ISAS), J. Norris (GSFC), D. Palmer (LANL),
A. Parsons, T. Sakamoto (GSFC) G. Sato (ISAS), M. Suzuki (Saitama),
J. Tueller (GSFC),  on behalf of the Swift-BAT team:

The BAT instrument on Swift triggered at 02:15:28 and at 02:33:12 UT 15 Feb 05,
triggers 106106 and 106107, respectively.  We have done preliminary analysis
on the ground using the TDRSS messages and the initial portions of the data
from a telemetry downlink.
+ Read more
February 2, 2005 - GRB050202
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3005
SUBJECT: GRB 050202: Short burst detected by Swift-BAT
DATE:    05/02/02 05:16:55 GMT
FROM:    Craig Markwardt at NASA/GSFC/UMD  

J. Tueller (GSFC), L. Antonelli (INAF-OAR), S. Barthelmy, 
L. Barbier (GSFC), D. Burrows (PSU), J. Cummings (GSFC), E. Fenimore (LANL),
N. Gehrels, K. Gendreau (GSFC), D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), 
C. Markwardt (GSFC/UMD), K. McLean (LANL), J. Nousek (PSU), 
D. Palmer (LANL), A. Parsons (GSFC), S. Piranmonte  (ASDC), 
T. Sakamoto (GSFC), G. Sato (ISAS), M. Suzuki (Saitama), A. Wells (Leicester)
on behalf of the Swift-BAT team:

Swift-BAT detected a burst at 03:35:14.79 UT.  The BAT on-board
calculated location is RA,Dec 290.560, -38.720 (J2000) with an
uncertainty of 4 arcmin (radius, 3-sigma, including a systematic
uncertainty).
+ Read more
January 28, 2005 - GRB050128
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2991
SUBJECT: GRB 050128: Swift XRT prompt afterglow position
DATE:    05/01/28 09:17:28 GMT
FROM:    David Burrows at PSU/Swift  

L. A. Antonelli (INAF-OAR), S. Campana, G. Tagliaferri, C. Pagani, A. 
Moretti, P. Romano, G. Chincarini (OAB), G. Cusumano, V. Mangano (ISAF/Palermo),
P. Giommi (ASI), D. N. Burrows, J. E. Hill, J. A. Kennea, J. Racusin,
J. A. Nousek (PSU), J. Osborne, K. Page, M. Goad, A. Beardmore,
A. Wells (U. Leicester), K. Mason (MSSL), N. White, N. Gehrels (NASA/GSFC),
report on behalf of the Swift XRT team:

The Swift BAT instrument detected an apparent burst at 04:20:04 UT on 2005 
January 28.  The spacecraft initiated a prompt automated slew and 
observation sequence.  The XRT began taking data on the burst at 2005-01-28 
04:23:51 and continued until 2005-01-28 05:55:27.  The XRT was in Photon 
Counting mode performing calibration observations of PG1311+129 when the 
burst occurred, and continued to collect data in Photon Counting mode 
during the slew and after settling onto the BAT field.  As a result, no 
prompt XRT position was reported to the ground.  However, analysis of the 
XRT data shows a bright, rapidly fading point source at:

RA(J2000): 14 38 17.87
DEC(J2000): -34 45 56.6
+ Read more
January 26, 2005 - GRB050126
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2984
SUBJECT: GRB 050126: Prompt XRT detection and localization
DATE:    05/01/26 14:16:46 GMT
FROM:    David Burrows at PSU/Swift  

J. A. Kennea, D. N. Burrows, J. E. Hill, D. Morris, J. A. Nousek (PSU), G. 
Tagliaferri, C. Pagani, S. Campana, A. Moretti, P. Romano, G. Chincarini 
(OAB), J. Osborne, K. Page, M. Goad, A. Beardmore, A. Wells (U. Leicester), 
N. Gehrels, N. White, L. Angelini, F. Marshall (NASA/GSFC), P. Giommi 
(ASI), K. McGowan, K. Mason (MSSL) report on behalf of the Swift XRT team:

The Swift XRT instrument reports a preliminary position for GRB 
050126.  The BAT detected this burst at 12:00:53 UT on January 26, 
2005.  The S/C slewed to the burst immediately.  The XRT was in Manual 
State taking calibration observations of Mkn 876 in PC mode at the time of 
the slew.  We settled on the BAT position at 12:03:04 and immediately began 
taking data in PC mode until 12:07:42, when we entered the South Atlantic 
Anomaly.  During this four minute period the XRT detected a very bright and 
rapidly fading X-ray source.  The initial position, based on the raw image 
data with no correction for stellar aberration, is:

RA(J2000) = 18:32:25.8
Dec(J2000) = +42:22:0.4.
+ Read more
January 24, 2005 - GRB050124
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2972
SUBJECT: GRB050124:  Swift-BAT position of a double-peaked burst
DATE:    05/01/24 13:08:18 GMT
FROM:    Craig Markwardt at NASA/GSFC/UMD  

C. Markwardt (GSFC/UMD), S. Barthelmy, L. Barbier (GSFC), 
J. Cummings (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), K. McLean (LANL), 
T. McMahon (Langston U.), D. Palmer (LANL), A. Parsons (GSFC), 
G. Sato (ISAS), P. Schady (MSSL), T. Sakamoto (GSFC), 
M. Suzuki (Saitama), J. Tueller (GSFC)
on behalf of the Swift-BAT team:

At 11:30:03 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB050124.  The spacecraft did not autonomously slew
to the burst because automatic operations were disabled for weekend
operations.  The spacecraft will be repointed via a Target of
Opportunity command.
+ Read more
January 17, 2005 - GRB050117
TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2951
SUBJECT: GRB050117: Swift XRT Position
DATE:    05/01/17 13:42:00 GMT
FROM:    David Burrows at PSU/Swift  

D. N. Burrows, J. E. Hill,  G. Chincarini, J. Nousek, N. Gehrels, and P. Schady
report on behalf of the Swift XRT team:

The Swift XRT reported a prompt position for GRB050117.  The burst was
discovered by the BAT and the Swift spacecraft performed a prompt slew.   The
XRT found a bright source in the field and imaged it at
IMG_START_DATE:  13387 TJD;    17 DOY;   05/01/17
IMG_START_TIME:  46548.64 SOD {12:55:48.64} UT

The XRT position is
GRB_RA:          358.4644d {+23h 53m 51s} (J2000),
                 358.5274d {+23h 54m 07s} (current),
                 357.8439d {+23h 51m 23s} (1950)
GRB_DEC:         +65.9418d {+65d 56' 30"} (J2000),
                 +65.9699d {+65d 58' 12"} (current),
                 +65.6635d {+65d 39' 49"} (1950)
+ Read more