TITLE: GCN CIRCULAR NUMBER: 6243 SUBJECT: Konus-Wind and Konus-A observations of GRB 070402 DATE: 07/04/04 12:25:49 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 and Konus-A teams report: The long GRB 070402 (Hurley et al., GCN 6241, 6242), triggered Konus-Wind at T0=56914.653 s UT (15:48:34.653). Konus-A observed this GRB in the waiting mode. The Konus-Wind light curve shows a single multipeaked pulse with a total duration of ~12 s. As observed by Konus-Wind the burst had a fluence of 1.17(-0.22, +0.06)x10^-5 erg/cm2, and a 256-ms peak flux measured from T0+3.184 s 3.18(-0.72, +0.42)x10^-6 erg/cm2/s (both in the 20 keV - 3 MeV energy range). The spectrum of the most intense part integrated from T0 to T0+8.192 s (this interval comprises ~90% of the burst total counts) is well fitted (in the 20 keV - 3 MeV range) by a power law with exponential cutoff model: dN/dE ~ E^(-alpha) * exp(-(2-alpha)*E/Ep) with alpha = 0.92(-0.12, +0.11) and Ep = 325(-40, +52) keV (chi2 = 60/68 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/GRB070402_T56914/