TITLE: GCN CIRCULAR NUMBER: 22119 SUBJECT: Konus-Wind observation of GRB 171108A DATE: 17/11/13 19:17:41 GMT FROM: Anna Kozlova at Ioffe Institute A.Kozlova, S. Golenetskii, R. Aptekar, D. Frederiks, P. Oleynik, M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, report: The short-duration, soft-spectrum GRB 171108A (Fermi GBM detection: Hamburg et al., GCN 22112; IPN triangulation: Svinkin et al., GCN 22117) triggered Konus-Wind at T0=56686.93 s UT (15:44:46.930). The burst light curve shows a single pulse which starts at T0-22 ms and has a total duration of ~30 ms. As observed by Konus-Wind, the burst had a fluence of 2.73(-0.38,+0.48)x10^-7 erg/cm2, and a 16-ms peak flux, measured from T0-0.016 s, of 1.25(-0.23,+0.27)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). Since the most intense part of the burst was detected before the trigger, the spectral analysis was performed using the KW 3-channel light curve data. Modeling the KW 3-channel time-integrated spectrum (from T0-0.022 s to T0+0.008 s) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) yields alpha = 0.86 (-1.20,+4.43), and Ep = 115 (-20,+30) keV. Fitting this spectrum by a blackbody function yields kT = 26.6 (-3.3, +4.3) keV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB171108_T56686/ The burst is not seen in the waiting mode data. All the quoted errors are at the 68% confidence level. All the quoted values are preliminary.