GCN Circular 22127
Subject
GRB 171115A: Swift-BAT refined analysis
Date
2017-11-16T04:11:47Z (6 years ago)
From
Amy Lien at GSFC <amy.y.lien@nasa.gov>
T. Sakamoto (AGU), S. D. Barthelmy (GSFC),
J. R. Cummings (CPI), H. A. Krimm (NSF/USRA),
A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),
D. M. Palmer (LANL), B. Sbarufatti (PSU)
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 downlink,
we report further analysis of BAT GRB 171115A (trigger #790053)
(Sbarufatti et al., GCN Circ. 22124). The BAT ground-calculated position is
RA, Dec = 278.392, 9.118 deg which is
RA(J2000) = 18h 33m 34.2s
Dec(J2000) = +09d 07' 06.4"
with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 100%.
The mask-weighted light curve shows a weak pulse that starts at ~T-7 s,
peaks at ~T-1 s, and ends at ~T+35 s. T90 (15-350 keV) is 38.2 +- 3.4 sec
(estimated error including systematics).
The time-averaged spectrum from T-7.38 to T+34.78 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.76 +- 0.18. The fluence in the 15-150 keV band is 6.9 +- 0.8 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T-2.32 sec in the 15-150 keV band
is 0.6 +- 0.1 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/790053/BA/