TITLE: GCN CIRCULAR NUMBER: 7548 SUBJECT: Konus-Wind observation of GRB 080328 DATE: 08/03/30 15:58:08 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 080328 (Swift-BAT trigger #307931: Perri et al., GCN 7525, Krimm et al., GCN 7533) triggered Konus-Wind at T0=28982.306 s UT (08:03:02.306). The burst light curve shows a multipeaked structure with a total duration of ~90 s. As observed by Konus-Wind the burst had a fluence of 2.23(-0.22, +0.23)x10^-5 erg/cm2, and a 256-ms peak flux measured from T0+10.512 s of (2.51 +/- 0.41)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+90.368 s) is well fitted (in the 20 keV-1 MeV range) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -1.13(-0.20, +0.17), and Ep = 289(-57, +93) keV (chi2 = 62.8/56 dof). The spectrum of the most intense part (from T0+8.448 to T0+16.640 s) is well fitted (in the same range) by a power law with exponential cutoff model with alpha = -0.59(-0.19, +0.17) and Ep = 338(-40, +51) keV (chi2 = 60.8/56 dof). The fluence of this part is (8.79 +/- 0.68)x10^-6 erg/cm2. 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/GRB080328_T28982/