TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2914 SUBJECT: GRB041226: Swift-BAT detection of a burst DATE: 04/12/26 23:31:39 GMT FROM: Hans Krimm at NASA-GSFC H. Krimm (GSFC/USRA), D. Palmer (LANL), S. Barthelmy (GSFC), L. Barbier (GSFC), M. Chester (PSU), J. Cummings (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hinshaw (GSFC), D. Hullinger (GSFC/UMD), C. Markwardt (GSFC/UMD), K. McLean (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC), G. Sato (ISAS), M. Suzuki (Saitama), G. Tagliaferri (OAB), J. Tueller (GSFC), A. Wells (U Leicester) on behalf of the Swift-BAT team: At 20:34:19 UT, the Swift Burst Alert Telescope (BAT) triggered and located on-board GRB041226. The spacecraft did not autonomously slew to the burst since automated slewing was not yet enabled. The BAT ground-calculated location is RA,Dec 79.544,73.349 (J2000) with an uncertainty of 6 arcmin (radius, 3-sigma, including a systematic uncertainty). The lightcurve is multi-peaked with a main emission duration of ~20 s, with 4 counts/cm^2 fluence and a peak (1 second interval) of ~0.5 counts/cm^2/s in the 15-350 keV band. -- ------------------------------------- Dr. Hans A. Krimm Universities Space Research Association NASA Goddard Space Flight Center Code 661, LHEA Greenbelt, MD 20771 USA 301-286-6955 fax 301-286-1684