TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2458 SUBJECT: IPN triangulation of GRB031201 (large error box) DATE: 03/12/02 19:21:52 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the Ulysses, Mars Odyssey, and KONUS GRB teams, E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, I. Mitrofanov, S. Charyshnikov, V. Grinkov, A. Kozyrev, M. Litvak, and A. Sanin, on behalf of the HEND-Odyssey GRB team, W. Boynton, C. Fellows, K. Harshman, C. Shinohara and R. Starr, on behalf of the GRS-Odyssey GRB team, and A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL SPI-ACS GRB team, report: Konus - Wind, Mars Odyssey - HEND, and INTEGRAL - SPI-ACS observed this ~30 s long burst at 22050 s. We have triangulated it to a preliminary annulus centered at RA, Decl(2000)= 351.816, -4.427 degrees, whose radius is 73.774 +/- 0.086 degrees (3 sigma). In addition, the Konus ecliptic latitude response limits the arrival direction to ecliptic latitudes above 50 degrees, that is, to those portions of the annulus north of RA, Decl = 282, +27 degrees and 24, +65 degrees. This localization may be improved, but a small error box cannot be derived for this burst.