TITLE:   GCN CIRCULAR
NUMBER:  38205
SUBJECT: Konus-Wind detection of GRB 241107A (short/hard)
DATE:    24/11/13 17:52:12 GMT
FROM:    Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>

D. Frederiks, A.Lysenko, A. Ridnaia, D. Svinkin,
A. Tsvetkova,  M. Ulanov, and T. Cline,
on behalf of the Konus-Wind team, report:

The short GRB 241107A (SVOM/GRM detection: Wang et al., GCN 38125;
INTEGRAL/IBIS/PICsIT detection: Rodi et al., GCN 38164;
IPN triangulation: Kozyrev et al., GCN 38165;
INTEGRAL IBIS localization: Mereghetti et al., GCN 38172;
Swift/BAT candidate arcminute localization: DeLaunay et al.: GCN 38177)
triggered Konus-Wind (KW) at T0=84602.493 s UT (23:30:02.493).

The burst light curve starts with a bright, multi-peaked emission pulse
with a duration of ~0.028 s, which is followed by a weaker, decaying emission.
The total duration of the burst is ~0.160 s.

The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB241107_T84602/

As observed by Konus-Wind, the burst had
a total fluence of 1.43(-0.33, +0.13)x10^-6 erg/cm^2 and
a 16-ms peak energy flux, measured from T0-0.096 s,
of 3.6 (-1.2, +0.2)x10^-5 erg/cm^2/s (both in the 20 keV - 10 MeV energy range).

Since the bulk of the burst emission was detected before
the trigger, the spectral analysis was performed using
the KW 3-channel light curve data.

The time-averaged spectrum of the burst (measured from T0-0.112 s to T0+0.048 s)
is best fit by a blackbody (BB) function with kT(BB) = 193 (-18, +20) keV.
This spectrum can be also described by a power law with
exponential cutoff (CPL) model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
with a hard photon index alpha = 1.32(-1.09,+2.7) and Ep = 760(-91,+390) keV.

The spectrum of the initial pulse alone (measured from T0-0.112 s to T0-0.080 s)
is best described by a blackbody function with kT(BB) = 251 (-31, +38) keV.
The fluence in this pulse is 1.15(-0.38, +0.06)x10^-6 erg/cm^2, or ~80%
of the total fluence.


All the quoted errors are estimated at the 68% confidence level.
All the presented results are preliminary.