GCN Circular 16402
Subject
GRB 140614A: Swift-BAT refined analysis
Date
2014-06-14T16:27:03Z (10 years ago)
From
Scott Barthelmy at NASA/GSFC <scott@lheamail.gsfc.nasa.gov>
C. B. Markwardt (GSFC), 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), K. L. Page (U Leicester), 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 140614A (trigger #601646)
(Page, et al., GCN Circ. 16391). The BAT ground-calculated position is
RA, Dec = 231.171, -79.110 deg, which is
RA(J2000) = 15h 24m 41.1s
Dec(J2000) = -79d 06' 36.9"
with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 97%.
The mask-weighted light curvea shows a broad peak starting at ~T-80 sec,
peaking at ~T+55 sec, and returning to baseline at ~T+200 sec (and
possibly out to around T+600 sec). The formal T90 (15-350 keV) is 720 +- 160 sec,
but with the long weak possible tail of this event it is hard to determine
the true end of the event (estimated error including systematics).
The time-averaged spectrum from T+0.51 to T+957 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.50 +- 0.46. The fluence in the 15-150 keV band is 1.3 +- 0.4 x 10^-6 erg/cm2.
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/601646/BA/