GCN Circular 15847
Subject
GRB 140215A: Swift-BAT refined analysis
Date
2014-02-15T22:06:04Z (11 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC),
C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)
(i.e. the Swift-BAT team):
Using the data set from T-240 to T+824 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 140215A (trigger #586680)
(Markwardt, et al., GCN Circ. 15837). The BAT ground-calculated position is
RA, Dec = 104.129, 41.787 deg, which is
RA(J2000) = 06h 56m 31.0s
Dec(J2000) = +41d 47' 12.2"
with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 15%.
The mask-weighted light curve shows several overlapping peaks starting
at ~T-15 sec, peaking at ~T+1 sec, and ending at ~T+180 sec.
T90 (15-350 keV) is 84.2 +- 53.1 sec (estimated error including systematics).
The time-averaged spectrum from T-1.47 to T+181.76 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.19 +- 0.08. The fluence in the 15-150 keV band is 7.8 +- 0.3 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T-0.01 sec in the 15-150 keV band
is 7.9 +- 0.7 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/586680/BA/