GCN Circular 4425
Subject
GRB 060102: Swift-BAT refined analysis
Date
2006-01-03T04:05:22Z (18 years ago)
From
Takanori Sakamoto at NASA/GSFC <takanori@milkyway.gsfc.nasa.gov>
H. Krimm (GSFC/USRA), L. Barbier (GSFC), S. Barthelmy (GSFC),
M. Chester (PSU), J. Cummings (GSFC/NRC), E. Fenimore (LANL),
N. Gehrels (GSFC), D. Hullinger (UMD), C. Markwardt (GSFC/UMD),
F. Marshall (GSFC), 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-119.9 to T+248.2 sec from the recent
telemetry downlink, we report further analysis of BAT GRB 060102
(trigger #175603) (Retter, et al., GCN 4423).
The BAT ground-calculated position is
(RA,Dec) = 328.834, -1.838 {21h 55m 20.3s, -1d 50' 17.8"} [deg; J2000]
+- 2.8 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 89 %.
The BAT light curve shows a single peak of about three seconds followed
by the small bump at T+16 sec. T90 (15-350 keV) is (21 +- 2) sec
(estimated error including systematics).
The power law index of the time-averaged spectrum is 1.19 +- 0.38.
The fluence in the 15-150 keV band is (2.4 +- 0.5) x 10^-07 erg/cm2.
The 1-sec peak photon flux measured from T+0.72 sec in the 15-150 keV
band is (0.4 +- 0.1) ph/cm2/sec. All the quoted errors are at the 90%
confidence level.
A data glitch caused the original GCN Notices to go out with
the wrong burst trigger time (02:45:43 instead of 21:17:28 UT).
This was not realized during the first circular (#4423),
but was corrected in circular 4424.