GCN Circular 3288
Subject
Swift-BAT detection of the bright and long GRB 050418
Date
2005-04-18T11:49:31Z (19 years ago)
From
Takanori Sakamoto at NASA/GSFC <takanori@milkyway.gsfc.nasa.gov>
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). We note this is 34 deg from the Sun, hence the s/c did not
slew because of the Sun observing constraint. The burst was 39 deg
off the BAT boresight. The lightcurve shows a main peak of duration
15-20 seconds, followed by apparent peaks at up to 70-80 seconds after
the trigger. The peak count rate measured by BAT was 4500 counts/sec
in the 15-350 keV band.