TITLE: GCN CIRCULAR NUMBER: 31054 SUBJECT: Konus-Wind detection of GRB 211106A DATE: 21/11/08 16:39:58 GMT FROM: Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru> A. Ridnaia, D. Frederiks, S. Golenetskii, A. Lysenko, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline on behalf of the Konus-Wind team, report: The short-duration GRB 211106A (Swift/BAT-GUANO localization: Tohuvavohu et al., GCN 31049) triggered Konus-Wind at T0=16652.485 s UT (04:37:32.485). The burst light curve shows a single pulse started at ~T0-0.3 s with a total duration of ~0.5 s. The emission is seen up to ~2 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB211106_T16652/ As observed by Konus-Wind, the burst had a fluence of 6.09(-1.22,+1.41)x10^-7 erg/cm2, and a 16-ms peak flux, measured from T0+0.070 s, of 3.37(-1.59,+1.68)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The spectrum of the burst (measured from T0 to T0+0.192 s) is best fit in the 20 keV - 2 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -0.02(-0.80,+1.13) and Ep = 196(-45,+78) keV (chi2 = 27/23 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.2 (chi2 = 27/22 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.