[vsnet-grb-info 15090] GRB 140610A: Swift-BAT refined analysis

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16382
SUBJECT: GRB 140610A: Swift-BAT refined analysis
DATE:    14/06/11 13:26:08 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <scott at lheamail.gsfc.nasa.gov>

A. Y. Lien (NASA/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), P. A. Evans (U Leicester), N. Gehrels (GSFC),
H. A. Krimm (GSFC/USRA), 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+552 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 140610A (trigger #601259)
(Evans, et al., GCN Circ. 16375).  The BAT ground-calculated position is
RA, Dec = 286.261, 3.899 deg, which is 
   RA(J2000)  =  19h 05m 02.7s 
   Dec(J2000) = +03d 53' 56.7" 
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 67%.
 
The mask-weighted light curve shows the emission starting at ~T-10 sec,
peaking at ~T+1 sec, and continuing out to T+110 sec at which time
the location left the BAT FoV when the Swift slewed to a pre-planned
observing target.
 
The time-averaged spectrum from T-6.67 to T+105.7 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.57 +- 0.06.  The 1-sec peak photon flux measured from T+0.48 sec
in the 15-150 keV band is 1.4 +- 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/601259/BA/