TITLE: GCN CIRCULAR NUMBER: 10356 SUBJECT: Konus-Wind observation of GRB 100119A DATE: 10/01/23 17:39:23 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report: The long GRB 100119A (Swift-BAT trigger=383063: Mangano et al., GCN 10348) triggered Konus-Wind at T0=66306.167s UT (18:25:06.167) The burst light curve shows a complex structure with a total duration of ~45 s. The emission is seen up to several MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB100119_T66306/ As observed by Konus-Wind the burst had a fluence of 6.1(+/-0.3)x10-5 erg/cm2, and a 256-ms peak flux measured from T0+18.176s of 4.3(+/-0.3)x10-6 erg/cm2/s (both in the 20 keV - 2 MeV energy range). The time-integrated spectrum of the burst (from T0 to T0+37.376 s) is well be fitted in the 20 keV - 10 MeV range by a power law with GRB (Band) model, for which: the low-energy photon index alpha = -0.73 (-0.08,+0.09), the high energy photon index beta = -2.8(-1.9, +0.4), the peak energy Ep = 377(-35, +35)keV (chi2 = 66/97 dof). The spectrum of the most intense part of the burst (measured from T0+15.360 to T0+21.504 s) is well fitted in the 20 keV - 10 MeV range by a power law with exponential cutoff model, for which alpha = -0.52(+/-0.11), and Ep = 387(-32, +37) keV (chi2 = 97/96 dof). All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.