GCN Circular 3619
Subject
Konus-Wind observation of GRB 050713A
Event
Date
2005-07-15T16:34:07Z (20 years ago)
From
Valentin Pal'shin at Ioffe Inst <val@mail.ioffe.ru>
S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, and
T. Cline on behalf of the Konus-Wind team report:
The long GRB 050713A (Swift-BAT trigger #145675;
Falcone et al., GCN 3581, Palmer et al., GCN 3597)
triggered Konus-Wind at T0=16141.745 s UT (04:29:01.745).
As observed by Konus-Wind it had a duration of ~16 s,
fluence (1.22 � 0.08)10-5 erg/cm2,
peak flux on 64-ms time scale (1.7 � 0.4)10-6 erg/cm2 s
(both in the 20 keV - 4 MeV energy range).
Konus-Wind did not detect additional smaller peaks,
reported by Swift-BAT.
Probably they were too weak to be detected by Konus-Wind.
The spectrum integrated over the most instense part of the GRB
(from T0 to T0+8.448 s) is well fitted (in 20 keV-4 MeV range)
by a power law with exponential cutoff model:
dN/dE ~ E^(-alpha) exp(-E/E0)
with alpha = 1.12 +/- 0.08,
and E0 = 355 � 70 keV.
The peak energy Ep = 312 � 50 keV.
--
Valentin Pal'shin
Ioffe Physico-Technical Institute
Laboratory for Experimental Astrophysics
26 Polytekhnicheskaya, St Petersburg 194021,
Russian Federation
email: val@mail.ioffe.ru
Tel: (7)-812-2479177
Fax: (7)-812-2471963