TITLE: GCN CIRCULAR NUMBER: 18838 SUBJECT: Konus-Wind observation of GRB 160101A DATE: 16/01/07 19:54:28 GMT FROM: Dmitry Svinkin at Ioffe Institute 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 long-duration, intense GRB 160101A (MAXI detection: Itoh et al., GCN Circ. 18793; Fermi GBM detection: Veres, GCN Circ. 18796) triggered Konus-Wind at T0=2631.931 s UT (00:43:51.931). The burst light curve shows a single pulse with a total duration of ~4.6 s. The emission is seen up to ~5 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB160101_T02631/ As observed by Konus-Wind, the burst had a fluence of 1.47(-0.17,+0.21)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+0.214 s, of 1.18(-0.30,+0.35)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+8.448 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 = -1.19(-0.19,+0.25), the high energy photon index beta = -2.86(-7.14,+0.38), the peak energy 143(-19,+20) keV (chi2 = 103/83 dof). The spectrum near the maximum count rate (measured from T0 to T0+0.256 s) is best fit in the 20 keV - 5 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -1.06(-0.23,+0.27) and Ep = 612(-175,+321) keV (chi2 = 26/41 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta <-2.0 (chi2 = 26/40 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.