GCN Circular 16379
Subject
Konus-Wind observation of GRB 140610A
Date
2014-06-11T10:31:09Z (10 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>
S. Golenetskii, R.Aptekar, D. Frederiks, V. Pal'shin,
P. Oleynik, M. Ulanov, D. Svinkin, A. Tsvetkova, A.Lyssenko, and T. Cline
on behalf of the Konus-Wind team, report:
The long GRB 140610A (Swift-BAT trigger #601259:
Evans et al., GCN 16375; T0(BAT)=16:31:29 UT)
was detected by Konus-Wind in the waiting mode.
The light curve shows a broad emission pulse which started
~3 s before the BAT trigger, peaked at ~T0(BAT)+3 s,
and lasted till ~T0(BAT)+150 s.
The K-W light curve of this burst is available at
http://www.ioffe.rssi.ru/LEA/GRBs/GRB140610A/
As observed by Konus-Wind, the burst had a fluence of
(1.6 � 0.3)x10^-5 erg/cm2 and a 2.944-s peak energy flux,
measured from ~T0(BAT)+3 s, of (2.3 � 0.3)x10^-7 erg/cm2
(both in the 20 - 10000 keV energy range).
Modeling the KW 3-channel time-integrated spectrum
(from T0(BAT)-3 s to T0(BAT)+150 s) by a power law
with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
yields alpha = -1.75 � 0.15, and Ep = 200 � 93 keV.
All the quoted errors are estimated at the 1 sigma confidence level.
All the presented results are preliminary.