TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5446 SUBJECT: Konus-Wind observation of GRB 060813 DATE: 06/08/14 18:49:49 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 long GRB 060813 (Swift-BAT trigger #224364; Moretti et al., GCN 5442; Cummings et al., GCN 5443) triggered Konus-Wind at T0=82221.576 s UT (22:50:21.576). As observed by Konus-Wind the burst shows a single pulse with a duration of ~6 s, followed by a weak soft tail seen up to T-T0 ~13 s. The burst fluence is (1.18 +/- 0.07)x10^-5 erg/cm2, and the 64-ms peak flux measured from T0+5.136 s (2.96 +/- 0.58)x10^-6 erg/cm2/s (both in the 20 keV - 1 MeV energy range). The time-integrated spectrum of the burst (from T0 to T0+6.656 s; in the 20 keV - 1 MeV range) is well fitted (in the 20 keV - 1 MeV range) by GRBM (Band) model for which: the low-energy photon index is alpha = -0.53 (-0.14,+0.16), the high energy photon index beta = -2.65(-0.49, +0.26), the break energy E0 = 130(-23, +27) keV (chi2 = 58/47 dof). The peak energy Ep = 192(-18, +20) keV. All the quoted errors are at the 90% confidence level.