TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2232 SUBJECT: IPN triangulation of GRB030518C (annulus) DATE: 03/05/19 20:25:58 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the Ulysses GRB team, and A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, report: Ulysses and INTEGRAL (SPI-ACS) observed this burst at 77317 s. As observed by Ulysses, it had a duration of approximately 6 seconds, a 25-100 keV fluence of approximately 4.8E-07 erg/cm2, and a peak flux of approximately 2.9E-07 erg/cm2 s over 0.50 seconds. We have triangulated it to a preliminary annulus centered at RA, Decl(2000)= 151.649, 35.188 degrees, whose radius is 69.765 +/- 0.132 degrees (3 sigma). This annulus can be constrained and/or improved, but as the event was not observed by Mars Odyssey, a small error box cannot be derived for it.