GCN Circular 18998
Subject
GRB 160203A: Swift-BAT refined analysis
Date
2016-02-07T15:41:25Z (9 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), P. D'Avanzo (INAF-OAB),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU), T. N. Ukwatta (LANL)
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlinks,
we report further analysis of BAT GRB 160203A (trigger #672525)
(D'Avanzo, et al., GCN Circ. 18979). The BAT ground-calculated position is
RA, Dec = 161.967, -24.772 deg, which is
RA(J2000) = 10h 47m 52.2s
Dec(J2000) = -24d 46' 17.9"
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 20%.
The mask-weighted light curve shows a single peak starting at ~T-1 sec,
peaking at ~T+13 sec, and ending at ~T+40 sec. T90 (15-350 keV) is
20.2 +- 3.2 sec (estimated error including systematics).
The time-averaged spectrum from T+1.46 to T+25.78 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.93 +- 0.20. The fluence in the 15-150 keV band is 1.2 +- 0.1 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+11.98 sec in the 15-150 keV band
is 1.3 +- 0.4 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/672525/BA/