GCN Circular 16916
Subject
GRB 141015A: Swift-BAT refined analysis
Date
2014-10-15T22:18:29Z (10 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU), E. Troja (NASA/GSFC/UMCP), J. Tueller (GSFC),
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 141015A (trigger #615399)
(Troja, et al., GCN Circ. 16909). The BAT ground-calculated position is
RA, Dec = 87.535, 18.370 deg, which is
RA(J2000) = 05h 50m 08.5s
Dec(J2000) = +18d 22' 12.5"
with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 98%.
The mask-weighted light curve shows s single FRED-like pulse starting
at ~T_0, peaking at ~T+1 sec, and ending at ~T+12 sec. T90 (15-350 keV)
is 11.0 +- 4.1 sec (estimated error including systematics).
The time-averaged spectrum from T+0.00 to T+13.00 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.90 +- 0.37. The fluence in the 15-150 keV band is 1.6 +- 0.4 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+1.00 sec in the 15-150 keV band
is 0.5 +- 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/615399/BA/