GCN Circular 33051

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

A bright burst from SGR 1935+2154
(also detected by Fermi-GBM (trigger 692607435)
and GECAM (both reported in GCN Notices))
triggered Konus-Wind at T0=25026.883 s UT (06:57:06.883)
on 2022 December 13.

The burst light curve shows a bright pulse,
which starts at ~T0-96 ms and has a total duration of ~142 ms.
The emission is seen up to ~200 keV.

The Konus-Wind light curve of this burst is available at
http://www.ioffe.ru/LEA/SGRs/221213_T25026/

As observed by Konus-Wind, the burst
had a fluence of 6.61(-0.48,+0.48)x10^-7 erg/cm2,
and a 16-ms peak flux, measured from T0-0.012 s,
of 1.31(-0.16,+0.16)x10^-5 erg/cm2/s
(both in the 20 - 500 keV energy range).

The spectrum of the burst
(measured from T0 to T0+0.064 s)
is best fit in the 20 - 500 keV range
by a power law with exponential cutoff model:
dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep)
with  alpha = 0.12(-1.06,+1.30)
and Ep = 37(-8,+4) keV (chi2 = 15/11 dof).

All the quoted errors are at the 90% confidence level.
All the quoted values are preliminary.