[vsnet-grb-info 2000] GRB050820B: BAT-Swift detection of a bright GRB
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sun Aug 21 09:25:39 JST 2005
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 <dmpalmer at mac.com>
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. The peak count rate
is 10,000 counts/s (15-350 keV) at T+9s. The first peak has
a maximum count rate of 2000 counts/s, with no obvious
emission above 100 keV.
Due to Earth limb constraints, the Swift slew is delayed until
until 00:16 UT (T+26 minutes).
More information about the vsnet-grb-info
mailing list