GCN Circular 18929
Subject
GRB 160123A: Swift-BAT refined analysis
Date
2016-01-23T18:39:27Z (9 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC),
H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),
D. Malesani (DARK/NBI), 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-240 to T+962 sec from the recent telemetry downlinks,
we report further analysis of BAT GRB 160123A (trigger #671447)
(Malesani, et al., GCN Circ. 18926). The BAT ground-calculated position is
RA, Dec = 150.277, -33.790 deg, which is
RA(J2000) = 10h 01m 06.4s
Dec(J2000) = -33d 47' 23.1"
with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 68%.
The mask-weighted light curve shows one peak starting at ~T-15 sec,
peaking at ~T+0.5 sec, and ending at ~T+10 sec.
T90 (15-350 keV) is 3.95 +- 0.62 sec (estimated error including systematics).
The time-averaged spectrum from T-2.05 to T+3.00 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.51 +- 0.16. The fluence in the 15-150 keV band is 3.5 +- 0.4 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+0.01 sec in the 15-150 keV band
is 1.3 +- 0.2 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/671447/BA/