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GCN Circular 12249

Subject
Konus-Wind observation of GRB 110802A
Date
2011-08-04T17:48:43Z (13 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>
S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin,
P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf
of the Konus-Wind team, report:

The short extremely hard GRB 110802A
(localized by IPN: Hurley et al., GCN 12247)
triggered Konus-Wind at T0=55156.191s UT (15:19:16.191)

The burst light curve shows a single double-peaked pulse,
the total duration of the burst is ~0.6 s.
The emission is seen up to ~10 MeV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB110802_T55156/

As observed by Konus-Wind the burst
had a fluence of (1.3 � 0.3)x10-5 erg/cm2,
and a 16-ms peak flux, measured from T0-0.032 s,
of (5.0 � 1.6)x10-5 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).

The spectrum of the burst (measured from T0 to T0+0.256 s)
is best fitted in the 20 keV - 10 MeV range
by a power law with exponential cutoff model, for which
alpha = -0.63 (-0.25, +0.31),
and Ep = 3451(-1086, +2256) keV,
chi2 = 24.0/24 dof.

All the quoted results are preliminary.
All the quoted errors are at the 90% confidence level.
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