TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1553 SUBJECT: IPN triangulation of GRB020926 (two large error boxes) DATE: 02/09/27 18:57:04 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the Ulysses GRB team, E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, and T. Cline, on behalf of the Ulysses and Konus GRB teams, report: Ulysses and Konus observed this burst at 17563 s. As observed by Ulysses, it had a duration of ~20 s, a 25-100 keV fluence of 5X10^-6 erg/cm^2, and a peak flux over 0.5 s of 5x10^-7 erg/cm^2 s. We have triangulated it to an annulus centered at RA, Decl(2000)= 173.261, +37.976 degrees, with radius 81.616 +/- 0.037 degrees (3 sigma). In addition, a preliminary analysis of the Konus data indicates that the burst arrived from an ecliptic latitude between +2 and +22 degrees. This limits the annulus to two sections, one between RA, Dec=236.8, -17.9 and 252.4, -0.3 degrees, and the other between RA, Dec=74.3, +24.7 and 55.8, +42.3. As Mars Odyssey did not observe this event, it will not be possible to derive a small error box for it.