GCN Circular 15662
Subject
GRB 140102A, Swift-BAT refined analysis
Date
2014-01-03T14:07:40Z (10 years ago)
From
Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),
N. Gehrels (GSFC), L. M. Z. Hagen (PSU), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU),
J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 140102A (trigger #582760)
(Hagen, et al., GCN Circ. 15653). The BAT ground-calculated position is
RA, Dec = 211.915, 1.332 deg which is
RA(J2000) = 14h 07m 39.5s
Dec(J2000) = +01d 19' 54.8"
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 99%.
The mask-weighted light curve shows many overlapping peaks starting
at ~T-0.2 sec, peaking at ~T+0.7 sec and ending at ~T+5 sec with a long
tail emission out to T+200 sec. T90 (15-350 keV) is 65 +- 15 sec (estimated
error including systematics).
The time-averaged spectrum from T-0.15 to T+131.22 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.38 +- 0.04. The fluence in the 15-150 keV band is 7.7 +- 0.2 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+1.97 sec in the 15-150 keV band
is 29.8 +- 0.6 ph/cm2/sec. All the quoted errors are at the 90% confidence
level.
The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/582760/BA/