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 7784

Konus-Wind observation of GRB 080602
2008-06-02T16:44:25Z (16 years ago)
Valentin Pal'shin at Ioffe Inst <>
S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks,
and T. Cline on behalf of the Konus-Wind team report:

The second, most intense pulse of the GRB 080602 (Swift-BAT trigger 
#312958: Beardmore et al., GCN 7781) triggered Konus-Wind
at T0=5486.229 s UT (01:31:26.229).

As observed by Konus-Wind the burst
had a fluence of 7.92(-1.45, +1.47)x10^-6 erg/cm2,
and a 256-ms peak flux measured from T0+1.280 s
of (1.92 +/- 0.58)x10^-6 erg/cm2/s
(both in the 20 keV - 1 MeV energy range).

The spectrum of the most intense part
(from T0 to T0+8.448 s) is well fitted (in the 20 keV-1 MeV range)
by a simple power law with the photon index of 1.48(-0.17, +0.18) (chi2 
= 39.7/53 dof). We note that because of the derived photon index is <2,
the fluence is very sensitive to the upper boundary of the energy range.
Fitting by a power law with exponential cutoff model:
dN/dE ~ (E^-alpha)*exp(-E*(2-alpha)/Ep)
yields alpha = 0.96(-0.76, +0.52),
and only a lower limit on the peak energy: Ep > 226 keV
(chi2 = 36.6/52 dof).

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

The Konus-Wind light curve of this GRB is available
Looking for U.S. government information and services? Visit