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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1930 SUBJECT: IPN triangulation of GRB030306 (intense; annulus only so far) DATE: 03/03/06 18:14:35 GMT FROM: Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu> K. Hurley and T. Cline, on behalf of the Ulysses and Mars Odyssey teams, I. Mitrofanov, D. Anfimov, A. Kozyrev, M. Litvak and A. Sanin, on behalf of the HEND-Odyssey GRB team, and W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on behalf of the GRS-Odyssey GRB team, report: This event was observed by Ulysses and Mars Odyssey (GRS and HEND). Its Earth-crossing time was 13102 +/- 287 s. (The uncertainty is due to the fact that no near-Earth spacecraft has reported this event so far.) As observed by Ulysses, it had a duration of approximately 20 seconds, a 25-100 keV fluence of approximately 2.3E-05 erg/cm2, and a peak flux of approximately 3.0E-06 erg/cm2 s over 0.25 seconds. We have triangulated it to a preliminary annulus centered at RA, Decl (2000) = 323.478, -42.567 degrees, with radius 31.976 +/- 0.057 degrees. This annulus may be constrained and/or improved. As it seems likely that this event was observed by a near-Earth spacecraft, a small error box can probably be derived for it.
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