TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1626 SUBJECT: IPN triangulation of GRB021008B (annulus) DATE: 02/10/11 22:03:25 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 GRB team, D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W. Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, and T. Cline, on behalf of the Ulysses and Konus GRB teams, report: Ulysses, Konus, and RHESSI observed this burst at 52203 s. As observed by Ulysses, it had a duration of about 10 s, a 25-100 keV fluence of about 3.7E-6 erg/cm2, and a peak flux over 0.5 s of 6.4E-7 erg/cm2 s. We have triangulated it to a preliminary annulus centered at RA, Decl (2000)=175.675, +36.812 degrees, whose radius is 56.097 +/- 0.151 degrees (3 sigma). In addition, the Konus ecliptic latitude response limits the arrival directions to ecliptic latitudes between 35 and 65 degrees, constraining the annulus to the sections between RA, Decl=235.5, +16.4 and 251.5,+43.7 degrees, and between RA, Decl=91.8, +58.4 and 23.5, +86.6 degrees. This triangulation can be improved, but at this point it is not clear whether this burst was observed by Mars Odyssey, and thus whether an error box can be derived for it.