TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1664 SUBJECT: IPN triangulation of a burst from SGR1900+14 on October 29 2002 DATE: 02/10/31 01:26:12 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the Ulysses GRB team, and D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, report: Ulysses and RHESSI observed this burst at 54965 s. As observed by Ulysses, it had a duration ~0.064 s, a 25-100 keV fluence of ~1.7E-6 erg/cm2, and a peak flux over 0.032 s of ~6.9E-6 erg/cm2 s. We have triangulated it to a preliminary annulus centered at RA, Decl(2000)=359.228, -35.522 degrees, whose radius is 81.458 +/- 0.010 degrees (3 sigma). As the center line of this annulus passes within 0.003 degrees of SGR1900+14, we conclude that this burst originated from that source. Previous bursts from SGR1900+14 were observed on October 10 and October 22 2002 (GCN 1643, 1655). The source is evidently in an active phase.