[vsnet-grb-info 1964] GRB050814: Refined analysis of the Swift-BAT burst

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3803
SUBJECT: GRB050814:  Refined analysis of the Swift-BAT burst
DATE:    05/08/14 21:17:56 GMT
FROM:    Scott Barthelmy at NASA/GSFC  <Scott at lheamail.gsfc.nasa.gov>

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

Using the full data set from the recent telemetry downlink, we report
further analysis of Swift-BAT GRB 050814 (trigger #150314)
(Retter, et al., GCN 3799).  The ground-analysis position is
RA,Dec 264.189,+46.354 (J2000) with an uncertainty of 3 arcmin
(radius, 90%, stat+sys).  The light curve shows a gradual increase
in emission starting at T-15 sec with a peak at ~T+5 sec
and then a longer gradual decline out to ~T+120 sec.
T90 is 65 +40/-20 sec.  Fitting a simple power law over
the interval from T-1 to T+67 sec, the photon index is
1.80 +/- 0.17 with a fluence of 2.17 +/- 0.36 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+4.2 seconds is 1.0 +/- 0.3 ph/cm^2/sec (15-350 keV).