GCN Circular 15906
Subject
GRB 140301A: Swift-BAT refined analysis
Date
2014-03-02T14:35:47Z (10 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
T. N. Ukwatta (MSU), 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), K. L. Page (U Leicester),
D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC),
(i.e. the Swift-BAT team):
Using the data set from T-239 to T+886 sec from recent telemetry downlinks,
we report further analysis of BAT GRB 140301A (trigger #589590)
(Page, et al., GCN Circ. 15896). The BAT ground-calculated position is
RA, Dec = 69.521, -34.249 deg, which is
RA(J2000) = 04h 38m 05.0s
Dec(J2000) = -34d 14' 56.8"
with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 66%.
The mask-weighted light curve shows a roughly symmetric peak starting
at ~T-15 sec, peaking at ~T+1 sec, and ending at ~T+20 sec.
T90 (15-350 keV) is 31.0 +- 5.7 sec (estimated error including systematics).
The time-averaged spectrum from T-13.18 to T+22.82 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.96 +- 0.28. The fluence in the 15-150 keV band is 4.4 +- 0.8 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+0.82 sec in the 15-150 keV band
is 0.7 +- 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/589590/BA/