GCN Circular 2908
Subject
GRB041224: Swift-BAT detection of a soft burst
Date
2004-12-24T22:48:18Z (20 years ago)
From
Scott Barthelmy at NASA/GSFC <Scott@lheamail.gsfc.nasa.gov>
S. Barthelmy (GSFC), C. Markwardt (GSFC/UMD), T. Sakamoto (),
L. Barbier, J. Cummings (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (GSFC/UMD), S. Hunsberger (PSU), H. Krimm (GSFC/USRA),
K. McLean, D. Palmer (LANL), A. Parsons (GSFC), G. Sato (ISAS),
M. Still (GSFC/USRA), M. Suzuki (Saitama), G. Tagliaferri (OAB) J. Tueller,
on behalf of the Swift-BAT team:
At 20:20:57 UT, the Swift Burst Alert Telescope (BAT) triggered and
located on-board GRB041224. The spacecraft did not autonomously slew
to the burst since automated slewing was not yet enabled.
The BAT ground-calculated location is RA,Dec 56.200,-6.656 (J2000)
with an uncertainty of 7 arcmin (radius, 3-sigma, including our
preliminary bore sight alignment correction). This is 40 degrees off
the BAT bore sight (33% partially encoded). The lightcurve is
multi-peaked with a total duration of ~50 sec in the 15-350 keV band.
The burst is soft with a power-law photon index of ~1.7-1.8.