TITLE: GCN CIRCULAR NUMBER: 17373 SUBJECT: Konus-Wind observation of GRB 150201A DATE: 15/02/02 17:10:25 GMT FROM: Anastasia Tsvetkova at Ioffe Institute S. Golenetskii, R. Aptekar, D. Frederiks, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, report: The long-duration, intense GRB 150201A (Swift BAT trigger 629302: Cannizzo et al., GCN 17368; Fermi-GBM detection: Yu and Pelassa, GCN 17370) triggered Konus-Wind at T0=49611.653 s UT (13:46:51.653). The burst light curve shows a double-peaked pulse with a total duration of ~26 s. The emission is seen up to ~10 MeV. No post-burst activity was observed by Konus-Wind until ~T0+450s; also, since the instrument switched to the read-out mode, there are no triggered or waiting mode data available for the time of the second GBM trigger 150201590 (14:09:56 UT; GCN 17370). The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB150201_T49611/ As observed by Konus-Wind, the burst had a fluence of 6.18(-0.22,+0.23)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+1.712 s, of 2.10(-0.28,+0.30)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+22.272 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -1.20(-0.11,+0.13), the high energy photon index beta = -2.89(-0.27,+0.17), the peak energy 123(-6,+5) keV (chi2 = 88/93 dof) The spectrum near the maximum count rate (measured from T0 to T0+2.048 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.77(-0.12,+0.14), the high energy photon index beta = -2.47(-0.25,+0.17), the peak energy 193(-20,+21) keV (chi2 = 65/50 dof) All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.