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GCN Circular 16105

Subject
GRB 140413A: Swift-BAT refined analysis
Date
2014-04-13T16:31:11Z (10 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),
V. D'Elia (ASDC), 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-239 to T+963 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 140413A (trigger #595616)
(D'Elia, et al., GCN Circ. 16098).  The BAT ground-calculated position is
RA, Dec = 65.439, -51.188 deg, which is 
   RA(J2000)  =  04h 21m 45.4s 
   Dec(J2000) = -51d 11' 15.1" 
with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 12%.
 
The mask-weighted light curve shows a slow rise starting at ~T-65 sec,
peaking at ~T+80 sec, and a faster decay out to ~T+115 sec.
T90 (15-350 keV) is 139.6 +- 12.6 sec (estimated error including systematics).
 
The time-averaged spectrum from T-52.0 to T+120.4 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.49 +- 0.08.  The fluence in the 15-150 keV band is 9.4 +- 0.5 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+77.05 sec in the 15-150 keV band
is 2.3 +- 0.5 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/595616/BA/
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