TITLE: GCN CIRCULAR NUMBER: 14772 SUBJECT: GRB 130603B: rest-frame energetics in gamma-rays DATE: 13/06/05 18:10:23 GMT FROM: Dmitry Frederiks at Ioffe Institute D. Frederiks, on behalf of the Konus-Wind team, report: Assuming z=0.356 (Thöne et al., GCN 14744), 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 of GRB 130603B from the Konus-Wind observation of the burst (Golenetskii et al., GCN 14771): the isotropic energy release E_iso is (2.1 ± 0.2)x10^51 erg, the peak luminosity (L_iso)_max is (4.4 ± 0.8)x10^52 erg/s, and the rest-frame peak energy Ep,i = (900 ± 140) keV