TITLE: GCN CIRCULAR NUMBER: 13425 SUBJECT: Konus-Wind observation of GRB 120707A DATE: 12/07/10 18:02:26 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 intense GRB 120707A (GBM trigger 363381140: Younes, GCN 13422; IPN localization: Hurley at al., GCN 13424) triggered Konus-Wind at T0=69146.810s UT (19:12:26.810) The light curve shows a strong pulse peaked at ~T0+24 s. A total duration of the burst is ~95 s. The emission is seen up to ~10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB120707_T69146/ As observed by Konus-Wind the burst had a fluence of 1.35(-0.15,+0.15)x10-4 erg/cm2, and a 256-ms peak flux, measured from T0+24.064 s, of 1.05(-0.15,+0.15)x10-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum of the burst (measured from T0 to T0+57.600 s) is best fit in the 30 keV - 10 MeV range with the GRB (Band) model, for which: the low-energy photon index alpha = -1.54 (-0.09, +0.12), the high energy photon index beta = -2.22 (-0.24, +0.14), the peak energy Ep = 190(-37, +41) keV, chi2 = 74.9/82 dof. The spectrum at the maximum count rate (measured from T0+20.224 to T0+26.368 s) is best fit in the 30 keV - 10 MeV range with the GRB (Band) model, for which: the low-energy photon index alpha = -1.30 (-0.12, +0.16), the high energy photon index beta = -2.3 (-0.38, +0.16), the peak energy Ep = 213(-41, +53) keV, chi2 = 86.4/82 dof. All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.