GCN Circular 4275
Subject
GRB 051114: Swift-BAT refined analysis
Date
2005-11-15T23:01:54Z (18 years ago)
From
Jay R. Cummings at NASA/GSFC/Swift <jayc@milkyway.gsfc.nasa.gov>
T. Sakamoto (GSFC/NRC), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hullinger (UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
F. Marshall (GSFC), D. Palmer (LANL), A. Parsons (GSFC),
G. Sato (ISAS), A. Smale (NASA HQ), J. Tueller (GSFC),
on behalf of the Swift-BAT team:
Using the full data set from T-4 to T+16 sec (all the data we will
get on this ground-detected burst), we report further analysis
of BAT GRB 051114 (trigger #163844) (Cummings, et al., GCN 4272).
The BAT ground-calculated position is (RA,Dec) = 226.266d,+60.156d
{15h 05m 04s,60d 09' 22"} [deg; J2000] +- 2 arcmin, (radius,
sys+stat, 90% containment). The partial coding was 78%.
The light curve shows two peaks of roughly equal intensity, the
second slightly softer, one from T+0.2 to T+0.9 sec and one from
T+1.3 to T+2.7 sec. T90 (15-350 keV) is (2.2 +- 0.3) sec (estimated
error including systematics).
The power law index of the time-averaged spectrum is 1.22 +- 0.27.
The fluence in the 15-150 keV band is (1.32 +- 0.24) x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+0.2 sec in the 15-150 keV
band is (0.73 +- 0.16) ph/cm2/sec. All the quoted errors are at the
90% confidence level.