Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 13621

Konus-Wind observation of GRB 120811B
2012-08-11T13:28:20Z (12 years ago)
Dmitry Frederiks at Ioffe Institute <>
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-duration hard GRB 120811B
(IPN localization: Golenetskii at al., GCN 13620)
triggered Konus-Wind at T0=01231.575s UT (00:20:31.575)

The light curve shows a double pulse,
a total duration of the burst is ~0.33 s.
The emission is seen up to ~6 MeV.

The Konus-Wind light curve of this GRB is available at

As observed by Konus-Wind the burst
had a fluence of 4.6(-0.9,+1.0)x10-6 erg/cm2,
and a 16-ms peak flux, measured from T0,
of 2.8(-0.6,+0.7)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 fit in the 20 keV - 7 MeV range
by a power law with exponential cutoff model, for which
alpha = -0.14 (-0.28, +0.35),
and Ep = 1130(-230, +310) keV,
chi2 = 13.6/24 dof.

All the quoted results are preliminary.
All the quoted errors are at the 90% confidence level.
Looking for U.S. government information and services? Visit