[vsnet-grb-info 2230] GRB051008: Swift-BAT detection of a bright burst

[GCN Circulars]

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  <Scott at lheamail.gsfc.nasa.gov>

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).