TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3070 SUBJECT: Ongoing activity of SGR 1806-20 after the giant flare DATE: 05/03/05 15:47:16 GMT FROM: Dmitry Frederiks at Ioffe Institute S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks on behalf of Konus-Wind and Helicon/Coronas-F teams, and T. Cline on behalf of the Konus-Wind team report: SGR-like burst 050304 was detected by Konus-Wind at 10:17:14.537 UT and Helicon-Coronas-F at 10:17:17.941 UT. We have triangulated it to an annulus centered at RA(2000) = 321.683 deg, Decl(2000) = -15.478 deg, whose radius is 47.167 ± 0.092 deg (3 sigma). As the center line of this annulus passes 0.033 degrees (1.1 sigma) from the position of SGR 1806-20 and the Konus ecliptic latitude response indicates that the source of the burst is near ecliptic plane, we conclude that this burst originated from SGR 1806-20. The burst had a duration of 0.13 sec, fluence 7.9x10-7 erg cm-2, and peak flux 8.7x10-6 erg cm-2 s-1, both in 20-200 keV range. The time-integrated spectrum of the burst can be fitted by the OTTB spectral model: dN/dE ~ E^{-1} exp(-E/kT), with kT = 22 ± 1 keV. Since the giant flare on 2004 December 27, Konus-Wind and/or Helicon-Coronas-F has detected 10 SGR-like bursts in the trigger mode, probably originated from SGR 1806-20.