GCN Circular 4237
Subject
GRB 051109B: Swift-BAT refined analysis
Date
2005-11-09T21:44:23Z (19 years ago)
From
Takanori Sakamoto at NASA/GSFC <takanori@milkyway.gsfc.nasa.gov>
D. Hullinger (UMD), L. Barbier (GSFC), S. Barthelmy (GSFC),
J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC),
D. Hinshaw (GSFC-SPSYS), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
P. Meszaros (PSU), D. Palmer (LANL), A. Parsons (GSFC),
T. Sakamoto (GSFC/NRC), G. Sato (ISAS), J. Tueller (GSFC),
on behalf of the Swift-BAT team:
Using the data set from T-300 to T+300 sec from the recent telemetry
downlink, we report further analysis of BAT GRB 051109B
(trigger #163170) (Tagliaferri, et al., GCN 4222).
The BAT ground-calculated position is
(RA,Dec) = 345.468, +38.666 {23h 1m 52.3s, 38d 39' 58"} [deg; J2000]
+-2.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 90%.
The light curve has a single peak. There is no strong emission in
the 100-350 keV band. T90 (15-350 keV) is (15 +- 1) sec
(estimated error including systematics).
The power law index of the time-averaged spectrum is 1.96 +- 0.25.
The fluence in the 15-150 keV band is (2.7 +- 0.4) x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T0+0.24 sec in the 15-150 keV
band is (0.5 +- 0.1) ph/cm2/sec. All the quoted errors are at the 90%
confidence level.