TITLE: GCN CIRCULAR NUMBER: 10590 SUBJECT: Konus-Wind observation of GRB 100413A DATE: 10/04/14 13:39:18 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team report: The long GRB 100413A (Swift-BAT trigger #419404: Holland et al., GCN 10581; Stamatikos et al., GCN 10585) was detected by Konus-Wind in the waiting mode. The burst light curve shows a multipeaked structure with a total duration of ~220 s. As observed by Konus-Wind, the burst had a fluence of (2.66 +/- 0.23)x10^-5 erg/cm2 (in the 20 - 1200 keV energy range). Modeling the K-W 3-channel time-integrated spectrum (from T0-3 s to T0+212 s) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) yields alpha = -1.01 ± 0.06, Ep = 446 +/- 123 keV. All the quoted errors are estimated at the 1 sigma confidence level. The K-W light curve of this burst is available at http://www.ioffe.rssi.ru/LEA/GRBs/GRB100413A/ Assuming z ~ 3.9 (Campana, Evans, and Holland, GCN 10588) and a standard cosmology model with H_0 = 71 km/s/Mpc, Omega_M = 0.27, Omega_Lambda = 0.73, the isotropic energy release is E_iso ~8x10^53 erg, and Ep_rest ~2200 keV.