[vsnet-grb-info 19587] Konus-Wind observation of GRB 170708A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  21330
SUBJECT: Konus-Wind observation of GRB 170708A
DATE:    17/07/12 16:23:08 GMT
FROM:    Dmitry Svinkin at Ioffe Institute  <svinkin at mail.ioffe.ru>

D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, P. Oleynik,
M. Ulanov, A. Tsvetkova, A. Lysenko, A.Kozlova, and T. Cline
on behalf of the Konus-Wind team, report:

The short-duration GRB 170708A
(IPN triangulation: Svinkin et al., GCN Circ. 21314;
Insight-HXMT detection: Xiong et al., GCN Circ. 21307)
triggered Konus-Wind at T0=3974.665 s UT (01:06:14.665).

The burst light curve shows a single pulse with
a total duration of ~0.2 s.
The emission is seen up to ~500 keV.

The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB170708_T03974/

As observed by Konus-Wind, the burst
had a fluence of 8.04(-1.2,+1.4)x10^-7 erg/cm2,
and a 16-ms peak flux, measured from T0-0.014 s,
of 1.48(-0.37,+0.40)x10^-5 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).

The time-integrated 3-channel spectrum of the burst,
measured from T0-0.014 s to T0+0.224 s,
can be modelled by an exponentially cut off power law:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
with alpha = -0.94(-0.30,+0.42) and Ep = 269(-75,+147) keV.

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