TITLE: GCN CIRCULAR NUMBER: 20059 SUBJECT: Konus-Wind observation of GRB 161014A DATE: 16/10/16 18:14:06 GMT FROM: Dmitry Frederiks at Ioffe Institute D. Frederiks, S. Golenetskii, R.Aptekar, P. Oleynik, M. Ulanov, D. Svinkin, A. Tsvetkova, A.Lysenko, A. Kozlova, and T. Cline, on behalf of the Konus-Wind team, report: The long GRB 161014A (Swift/BAT observation: Racusin et al., GCN 20035; Barthelmy et al., GCN 20049; Fermi GBM observation: Bissaldi, GCN 20051) triggered Konus-Wind at T0=45088.321 s UT (12:31:28.321). The light curve shows a multi-peaked pulse with a duration of ~25 s. A weak, soft pulse is also seen in the burst light curve around ~T0+95 s, which KW ecliptic latitude response is consistent with the position of GRB 161014A. The emission is seen up to ~3 MeV. As observed by Konus-Wind, the burst had a fluence of (4.7 ± 0.7)x10^-6 erg/cm2 and a 64-ms peak energy flux, measured from T0-0.032, of (1.3 ± 0.4)x10^-6 erg/cm2 (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum (measured from T0 to T0+16.640 s) is best fit in the 20 keV - 5 MeV range by a cutoff power-law (CPL) function with the following model parameters: the photon index alpha = -1.15(-0.48,+0.73), and the peak energy Ep = 226(-79,+267) keV, chi2 = 92/78 dof. Fitting this spectrum with the GRB (Band) function yields the same alpha and Ep with only an upper limit on beta of -1.8, chi2 = 92/71 dof. Assuming the redshift z=2.823 (de Ugarte Postigo et al., GCN 20043) and a standard cosmology model with H_0 = 70 km/s/Mpc, Omega_M = 0.3, and Omega_Lambda = 0.7, we estimate the following rest-frame parameters: the isotropic energy release E_iso is ~8.2x10^52 erg, the peak luminosity L_iso is ~8.7x10^52 erg/s, and the rest-frame peak energy of the time-integrated spectrum, Ep,i, is ~860 keV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB161014_T45088/ All the quoted errors are estimated at the 90% confidence level. All the presented results are preliminary.