TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1891 SUBJECT: IPN triangulation of GRB030225 (annulus) DATE: 03/02/27 01:43:40 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the Ulysses GRB team, D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, and T. Cline, on behalf of the Ulysses and Konus GRB teams, report: Ulysses, RHESSI, and Konus-Wind observed this GRB at 54173 seconds. As observed by Ulysses, it had a duration of approximately 80 seconds, a 25-100 keV fluence of approximately 9.0E-06 erg/cm2, and a peak flux of approximately 5.2E-07 erg/cm2 s over 0.50 seconds. We have triangulated it to a preliminary annulus centered at RA, Decl(2000)= 168.733, 42.050 degrees, whose radius is 67.501 +/- 0.172 degrees (3 sigma). This annulus may be constrained and/or improved, but it is not known at this point whether this event was observed by Mars Odyssey, and thus whether a small error box can be derived for it.