TITLE: GCN CIRCULAR NUMBER: 12824 SUBJECT: Konus-Wind observation of GRB 120107A DATE: 12/01/10 16:51:34 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report: The long GRB 120107A (GBM trigger 347620337; Fermi/LAT detection: Zheng and Akerlof, GCN 12822; IPN triangulation: Hurley et al., GCN 12823) triggered Konus-Wind at T0=33132.445s UT (09:12:12.445) The light curve shows multiple partly overlapped pulses. A total duration of the burst is ~25 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/GRB120107_T33132/ As observed by Konus-Wind the burst had a fluence of 5.5(-1.0,+1.5)x10-6 erg/cm2, and a 64-ms peak flux, measured from T0-0.128 s, of 1.2(-0.2,+0.3)x10-6 erg/cm2/s (both in the 20 keV - 2 MeV energy range). The time-integrated spectrum of the burst (measured from T0 to T0+24.832 s) is best fit in the 20 keV - 2 MeV range by a power law with exponential cutoff model, for which alpha = -1.38 (-0.26, +0.33), and Ep = 196(-54, +160) keV, chi2 = 82.5/58 dof. The spectrum at the maximum count rate (measured from T0 to T0+8.448 s) is best fit in the 20 keV - 2 MeV range by a power law with exponential cutoff model, for which alpha = -0.98 (-0.34, +0.41), and Ep = 178(-37, +72) keV, chi2 = 60.0/58 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.