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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2230 SUBJECT: IPN triangulation of GRB030518A (annulus) DATE: 03/05/19 00:05:14 GMT FROM: Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu> K. Hurley and T. Cline, on behalf of the Ulysses and Konus GRB teams, 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, A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, and 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, report Ulysses, RHESSI, Konus-Wind, INTEGRAL (SPI-ACS), and HETE-FREGATE (H2714) observed this GRB at 05024 seconds. As observed by Ulysses, it had a duration of approximately 25 seconds, a 25-100 keV fluence of approximately 1.5E-05 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)= 331.814, -35.254 degrees, whose radius is 47.844 +/- 0.025 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.
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