GCN Circular 23685
Subject
GRB 190114A: Swift-BAT refined analysis
Date
2019-01-14T18:36:28Z (5 years ago)
From
Amy Lien at GSFC <amy.y.lien@nasa.gov>
S. D. Barthelmy (GSFC), J. R. Cummings (CPI),
H. A. Krimm (NSF/USRA), S. J. LaPorte (PSU),
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 downlink,
we report further analysis of BAT GRB 190114A (trigger #883600)
(LaPorte et al., GCN Circ. 23677). The BAT ground-calculated position is
RA, Dec = 65.543, 2.196 deg which is
RA(J2000) = 04h 22m 10.2s
Dec(J2000) = +02d 11' 45.8"
with an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 78%.
The mask-weighted light curve shows some weak-overlapping pulses that start
at ~T+125 s and end at ~T+200 s. T90 (15-350 keV) is 66.6 +- 10.2 sec
(estimated error including systematics).
The time-averaged spectrum from T+126.40 to T+199.22 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
2.06 +- 0.22. The fluence in the 15-150 keV band is 8.0 +- 1.2 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+151.08 sec in the 15-150 keV band
is 0.5 +- 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/883600/BA/