[vsnet-grb-info 1782] GRB050715: Refined analysis of the Swift-BAT burst

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3622
SUBJECT: GRB050715:  Refined analysis of the Swift-BAT burst
DATE:    05/07/16 02:19:30 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <Scott at lheamail.gsfc.nasa.gov>

L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC),
E. Fenimore (LANL), N. Gehrels (GSFC), J. Greiner (MPE),
D. Hullinger (GSFC/UMD), K. Hurley (Berkeley), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), J. Norris (GSFC), D. Palmer (LANL),
A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), J. Tueller (GSFC)
on behalf of the Swift-BAT team:

Using the full data set from the recent telemetry downlink, we report
further analysis of Swift-BAT Trigger #146129 (Greiner, et al., GCN 3621).
The ground-analysis position is RA,Dec 155.645,-0.040 (J2000) with an
uncertainty of 3 arcmin (radius, 90%, stat+sys).  T90 is 52 +- 2 sec.
Fitting a simple power law over the full interval from T-10 to T+54 seconds,
the photon index is 1.6 +/- 0.1 with a fluence of 2.5 +/- 0.26 X 10^-6 erg/cm^2
in the 15-350 keV band (90% c.l.).  The peak flux in a 1-sec wide window
starting at T+40.4 seconds is 1.24 +/- 0.17 ph/cm^2/sec (15-350 keV).