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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2057 SUBJECT: IPN triangulation of GRB030331 (annulus) DATE: 03/04/01 02:27:53 GMT FROM: Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu> K. Hurley, on behalf of the Ulysses GRB team, S. Golenetskii, E. Mazets, V. Pal'shin, and D. Frederiks on behalf of Konus-Wind and Helicon/Coronas-F teams, A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, and T. Cline, on behalf of the Ulysses and Konus GRB teams, report: Ulysses, Konus-Wind, INTEGRAL (SPI-ACS), and Helicon/Coronas-F observed this GRB at 20324 seconds. As observed by Ulysses, it had a duration of approximately 10 seconds, a 25-100 keV fluence of approximately 4.6E-06 erg/cm2, and a peak flux of approximately 1.3E-06 erg/cm2 s over 0.25 seconds. We have triangulated it to a preliminary annulus centered at RA, Decl(2000)= 338.090, -41.009 degrees, whose radius is 77.935 +/- 0.021 degrees (3 sigma ). This annulus may be constrained and/or improved, but as the event was not observed by Mars Odyssey, a small error box cannot be derived for it.
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