[vsnet-grb-info 2525] Refined analysis of the SWIFT J1626.6-5156

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4362
SUBJECT: Refined analysis of the SWIFT J1626.6-5156
DATE:    05/12/19 15:16:03 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <Scott at lheamail.gsfc.nasa.gov>

S. Barthelmy (GSFC), L. Barbier (GSFC), J. Cummings (GSFC/NRC),
E. Fenimore (LANL), N. Gehrels (GSFC), D. Hinshaw (GSFC-SPSYS),
D. Hullinger (GSFC/UMD), J. Kennea (PSU), H. Krimm (GSFC/USRA),
C. Markwardt (GSFC/UMD), K. McLean (LANL), D. Palmer (LANL),
A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), G. Sato (ISAS), J. Tueller (GSFC)
on behalf of the Swift-BAT team:

Using the data from T-60 to T+120 sec from telemetry downlinks, we report
further analysis of Swift-BAT hard x-ray source J1626.6-5156 (trigger 173321)
(Krimm, et al., GCN 4361).  The ground-analysis position is
RA,Dec 246.632,-51.945 {16h 26m 31.8s,-51d 56' 41.6"} (J2000)
with an uncertainty of 2.5 arcmin (radius, 90%, stat+sys).

The partial coding fraction is 30%.  This source has been detected by BAT
22 times in the last 24 hours.  It is higly variable ranging from 100 mCrab
to 1500 mCrab.

Fitting a simple power law over the full interval from T0 to T+64 sec,
the photon index is 3.3 +/- 0.6 (15-150 keV band at the 90% confidence level).

This location will come out of the Swift Sun observing contraint
on 09 Jan 2005.