TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4936 SUBJECT: SGR 1900+14: bright burst detected by Konus-Wind on March 28 DATE: 06/03/29 15:48:50 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: A bright SGR-like burst 060328 was detected by Konus-Wind at 32580.175 s UT (09:03:00.175). The Konus-Wind ecliptic latitude response is consistent with SGR 1900+14 position (and is inconsistent with the positions of all other known SGRs). So, taking in account the resuming SGR 1900+14 activity detected recently by Swift-BAT (Vetere et al., GCN 4922; Sato et al., GCN 4923, 4924), we believe that this burst originated from this SGR. The recent Swift-BAT reports on detections of SGR 1900+14 bursts on March 29 (Moretti et al., GCN 4933; Romano et al., GCN 4934) also confirm our conclusion. At the time of the burst Swift was in SAA. The burst light curve shows the main two-peaked pulse with a duration of ~0.13 sec and a much weaker precursor at T-T0~ -0.14 with a duration of ~0.03 sec. The burst had a fluence 1.06(-0.10,+0.08)x10^-6 erg/cm2, and a peak flux measured from T0+0.026 sec on 4 msec time scale 2.18(-0.35,+0.33)x10^-5 erg/cm2/sec (both in the 20-200 keV energy range). The spectrum integrated over the most intense part of the burst (from T-T0=0 to T-T0=0.064 sec) is well fitted (in the 20-200 keV range) by the OTTB spectral model: dN/dE ~ E^{-1} exp(-E/kT), with kT = 21.6 +/ 2.0 keV. All the quoted errors are at the 90% confidence level.