GCN Circular 11879
Subject
GRB 110402A: Konus-Wind spectral lags and detailed energetics
Event
Date
2011-04-04T17:05:29Z (15 years ago)
From
Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>
D. Frederiks and D. Svinkin on behalf of the Konus-Wind team,
report:
1. The further analysis of the Konus-Wind detection (GCN 11869)
of GRB 110402A (GCN 11857, 11866) confirms the zero spectral
lag in the initial hard pulse reported with the Swift-BAT data
(Barthelmy and Norris, GCN 11870).
The following lag values between the Konus-Wind light curves
are obtained:
-------------------------------------------------------------
LC1(keV) LC2(keV) Search Interval(s) Scale Lag(ms)
-------------------------------------------------------------
G2(70-300) G1(18-70) -0.512:+0.320 8 ms +3.5 � 12.5
G3(300-1160) G1(18-70) -0.512:+0.280 8 ms +3.2 � 12.3
G3(300-1160) G2(70-300) -0.340:+0.320 4 ms -0.3 � 4.8
-------------------------------------------------------------
The errors are given on 1 sigma level.
2. The total burst fluence S=(1.6 � 0.5)x10-5 erg/cm2 reported
in GCN 11869 is divided between the hard initial pulse and
the softer extended emission as follows:
T0(-0.512 : +2.816) -> S1=(5.7 � 1.9)x10-6 erg/cm2 (initial pulse)
T0(2.816 : +65.792) -> S2=(9.9 � 2.9)x10-6 erg/cm2 (extended emission)
The K-W spectrum of the latter part (measured from T0+8.448s
to T0+65.792s) can be fitted in the 20-5000 keV range
by the simple power law function with the index of (1.81 � 0.13),
chi2 = 93.4/78
The errors are given on 90% confidence level.
All times are given relative to K-W T0=781.989s UT.