GCN Circular 16213
Subject
Konus-Wind observation of GRB 140423A
Event
Date
2014-05-05T07:43:26Z (12 years ago)
From
Valentin Pal'shin at Ioffe Inst <val@mail.ioffe.ru>
S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P.
Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind
team report:
The long GRB 140423A (Swift-BAT trigger #596901: Sonbas, et al., GCN
Circ. 16142, Cummings, et al., GCN Circ. 16161) was detected by
Konus-Wind in the waiting mode.
The burst light curve shows a single episode started at ~T0(BAT)-46 s
with a duration of ~130 s.
As observed by Konus-Wind, the burst had a fluence of
1.87(-0.17,+0.13)x10^-5 erg/cm2 (in the 20 - 1200 keV energy range).
Modeling the K-W 3-channel time-integrated spectrum (from T0(BAT)-46 s
to T0(BAT)+84 s) by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
yields alpha = -1.1 +/- 0.1, and Ep = 196(-20,+30) keV.
All the quoted errors are estimated at the 1 sigma confidence level.
All the presented results are preliminary.
The K-W light curve of this burst is available at
http://www.ioffe.rssi.ru/LEA/GRBs/GRB140423A/