GCN Circular 20977
Subject
Konus-Wind observation of GRB 170403A (short/hard)
Date
2017-04-04T15:25:20Z (8 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>
D. Frederiks, S. Golenetskii, R.Aptekar, P. Oleynik, M. Ulanov,
D. Svinkin, A. Tsvetkova, A.Lysenko, A. Kozlova, and T. Cline,
on behalf of the Konus-Wind team, report:
The short GRB 170403A (Fermi-GBM observation: Roberts & Meegan,
GCN 20975; IPN triangulation: Svinkin et al., GCN 20976) triggered
Konus-Wind at T0=50358.544 s UT (13:59:18.544).
The light curve shows a single pulse with a duration of ~0.12s.
As observed by Konus-Wind, the burst had a fluence of
(5.4 �� 0.8)x10^-7 erg/cm2 and a 16-ms peak energy flux,
measured from T0-0.016, of (7.6 �� 1.8)x10^-6 erg/cm2
(both in the 20 keV - 10 MeV energy range).
The time-integrated 3-channel spectrum of the burst, measured from
T0-0.064 s to T0+0.064 s, can be modeled by an exponentially cutoff
power law with alpha = -0.16 (-0.36, +0.46) and Ep = 357(-58,+90) keV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB170403_T50358/
All the quoted errors are estimated at the 1 sigma confidence level.
All the presented results are preliminary.