TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1919 SUBJECT: IPN triangulation of GRB030301 (annulus) DATE: 03/03/03 22:03:33 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the Ulysses and HETE GRB teams, E. Mazets and S. Golenetskii, on behalf of the Konus-Wind 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, G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R. Vanderspek, J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R. Manchanda, G. Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, T. Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on behalf of the HETE GRB team, and T. Cline, on behalf of the Ulysses, HETE, and Konus GRB teams, report: Ulysses, RHESSI, HETE-FREGATE, and Konus-Wind observed this GRB (H2610) at 73640 seconds. As observed by Ulysses, it had a duration of approximately 30 seconds, a 25-100 keV fluence of approximately 1.1E-05 erg/cm2, and a peak flux of approximately 5.3E-07 erg/cm2 s over 0.50 seconds. We have triangulated it to a preliminary annulus centered at RA, Decl (2000) = 167.280, 42.132 degrees, whose radius is 76.348 +/- 0.161 degrees (3 sigma). This annulus may be constrained and/or improved, but at this point it is not known whether this event was observed by Mars Odyssey, and thus whether a small error box can be obtained for it.