TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4881 SUBJECT: Konus-Wind observation of GRB 060313 DATE: 06/03/14 15:54:19 GMT FROM: Valentin Pal'shin at Ioffe Inst S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, and T. Cline on behalf of the Konus-Wind team report: The GRB 060313 (Swift-BAT trigger #201487; Pagani et al., GCN 4867; Markwardt et al., GCN 4873) triggered Konus-Wind at T0=726.354 s UT (00:12:06.354). The Konus-Wind light shows several multipeaked pulses with a total duration of ~0.8 sec. As observed by Konus-Wind the burst had a fluence of 1.42(-0.85, +0.10)x10^-5 erg/cm2 and peak flux on 16-ms time scale measured from T-T0=0.560 sec 7.0(-4.3, +1.0)x10^-5 erg/cm2/sec (both in the 20 keV - 2 MeV energy range). The time-integrated spectrum of the GRB is well fitted (in the 20 keV - 2 MeV range) by a power law with exponential cutoff model: dN/dE ~ E^(-alpha) * exp(-(2-alpha)*E/Ep) with alpha = 0.60(-0.22, +0.19) and Ep = 922(-177, +306) keV (chi2 = 62/59 dof). The fitting of the spectrum of the GRB initial part (accumulated from T-T0=0 to T-T0=0.192 sec in the same energy range) gives an unusual photon index alpha: alpha = -0.33(-0.29, +0.25) Ep = 655(-74, +84) (chi2 = 51/59 dof). All the quoted errors are at the 90% confidence level. The Konus-Wind light curve of this GRB is available at http://www.ioffe.rssi.ru/LEA/GRBs/GRB060313_T00726/