GCN Circular 14668
Subject
Konus-Wind observation of GRB 130515A
Event
Date
2013-05-16T10:01:58Z (13 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@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 short-duration GRB 130515A (Swift-BAT trigger #555880:
Malesani et al., GCN 14650, Barthelmy et al., GCN 14658;
Fermi-GBM detection: Jenke, GCN 14663)
triggered Konus-Wind at T0=04880.440s UT (01:21:20.440)
The burst light curve shows a single pulse
from ~T0-0.05 s to ~T0-0.2 s, with a total duration of ~0.25s.
The K-W light curve of this burst is available at
http://www.ioffe.rssi.ru/LEA/GRBs/GRB130515_T04880/
As observed by Konus-Wind, the burst had a fluence
of (1.1 � 0.2)x10-6 erg/cm2 and a 16-ms peak flux,
measured from T0-0.016 s, of (2.1 � 0.5)x10-5 erg/cm2
(both in the 20 - 1500 keV energy range).
Modelling the K-W 3-channel time-integrated spectrum
(from T0-0.064 s to T0+0.192 s)
by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
yields alpha = 0.0 � 0.4, and Ep = 410 � 90 keV
Modelling the K-W 3-channel spectrum at the maximum count rate
(from T0-0.064 s to T0)
by a power law with exponential cutoff model
yields alpha = -0.5 � 0.4, and Ep = 715 � 360 keV
All the quoted errors are at the 1 sigma confidence level.