TITLE: GCN CIRCULAR NUMBER: 19635 SUBJECT: Konus-Wind observation of GRB 160629A DATE: 16/06/30 18:37:43 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 160629A (INTEGRAL detection: Gotz et al., GCN 19621; Fermi GBM observation: Toelge, GCN 19628) triggered Konus-Wind at T0=80385.314 s UT (22:19:45.314). The light curve shows a smooth pulse with a total duration of ~40 s. The weaker subsequent emission is traceable up to ~T0+70 s. The emission in the main pulse is seen up to ~4 MeV. As observed by Konus-Wind, the burst had a fluence of 1.5(-0.4,+0.6)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+10.560 s, of 1.4(-0.3,+0.3)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum (measured from T0 to T0+24.832 s) is best fit in the 20 keV - 5 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -0.79 (-0.17,+0.23), the high energy photon index beta = -2.92 (-3.68,+0.50), the peak energy Ep = 227 (-41,+41) keV, chi2 = 76/76 dof. Assuming the redshift z=3.332 (Castro-Tirado et al., GCN Circ. 19632) and a standard cosmology model with H_0 = 70 km/s/Mpc, Omega_M = 0.27, and Omega_Lambda = 0.73, we estimate the following rest-frame parameters: the isotropic energy release E_iso is ~3.7x10^53 erg, the peak luminosity L_iso is ~1.5x10^53 erg/s, and the rest-frame peak energy of the time-integrated spectrum, Ep,i, is ~980 keV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB160629_T80385/ All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.