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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1918 SUBJECT: IPN triangulation of GRB030228 (annulus) DATE: 03/03/03 20:26:01 GMT FROM: Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu> K. Hurley, on behalf of the Ulysses GRB team, A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, 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, and T. Cline, on behalf of the Ulysses and Konus GRB teams, report: Ulysses, INTEGRAL (SPI-ACS), RHESSI, and Konus-Wind observed this GRB at 73606 seconds. As observed by Ulysses, it had a duration of approximately 15 seconds, a 25-100 keV fluence of approximately 2.0E-06 erg/cm2, and a peak flux of approximately 4.9E-07 erg/cm2 s over 0.50 seconds. We have triangulated it to a preliminary annulus centered at RA, Decl (2000)= 347.624, -42.117 degrees, whose radius is 84.182 +/- 0.157 degrees (3 sigma). This annulus may be constrained and/or improved, but at this stage it is not clear whether this event was observed by Mars Odyssey, and thus whether a small error box can be obtained for it.
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