TITLE: GCN CIRCULAR NUMBER: 5984 SUBJECT: Konus-Wind observation of GRB 061222A DATE: 06/12/27 14:29:39 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 most intense part of the long GRB 061222A (Swift-BAT trigger #252588; Grupe et al., GCN 5954; Tueller et al., GCN 5964) triggered Konus-Wind at T0=12614.682 s UT (03:30:14.682). The emission is clearly seen in the Konus-Wind data starting at T-T0~-80 s. As observed by Konus-Wind the burst had a duration of ~100 s, fluence 2.66(-0.23, +0.43)x10^-5 erg/cm2, the 64-ms peak flux measured from T0+5.312 s 5.65(-1.19, +1.42)x10^-6 erg/cm2/s (both in the 20 keV - 2 MeV energy range). The spectrum integrated over the most intense part of the burst (from T0 to T0+15.104 s) is well fitted (in the 20 keV - 2 MeV range) by GRBM (Band) model for which: the low-energy photon index is alpha = -0.94(-0.13, +0.14), the high energy photon index beta = -2.41(-1.21, +0.28), the peak energy Ep = 283(-42, +59) keV (chi2 = 64/60 dof). The fitting by a power law with exponential cutoff model: dN/dE ~ E^(-alpha)*exp(-E*(2-alpha)/Ep) in the same energy range yields alpha = 1.02(-0.11, +0.10) and Ep = 324(-41, +54) keV (chi2 = 67/61 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/GRB061222_T12614/ [GCN OPS NOTE(28dec06): Per author's request, the author list was added.]