TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1076 SUBJECT: IPN triangulation of GRB010629 DATE: 01/06/29 21:23:15 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the Ulysses GRB team, and E. Montanari, C. Guidorzi, and F. Frontera, on behalf of the Beppo-SAX GRBM team, report: Ulysses and the BeppoSAX GRBM observed GRB010629 (HETE-II observation in GCN 1075). As observed by Ulysses, its duration was approx. 20 s, its 25-100 keV fluence was approx. 9 x 10^-5 erg/cm^2, and its peak flux over 0.5 s was 1.4 x 10^-6 erg/cm^2 s. Triangulation gives an annulus centered at RA(2000), Decl. (2000) = 198.208 deg., -37.333 deg., with radius 47.083 +/- 0.130 deg. (3 sigma). One circle of the annulus roughly bisects the HETE-II error circle with intersection points RA(2000), Decl(2000)= 16 h 33 m 12 s, -18 o 55' 58" and 16 h 32 m 02 s, -18 o 31' 06" The other circle of the annulus lies slightly outside the error circle, but comes close to grazing it at RA(2000), Decl(2000)= 16 h 31 m 43 s, -18 o 50' 07" . Thus the combined HETE/IPN error region has a total area of about 350 sq. arcmin., or approximately one-half that of the HETE error circle alone. This annulus may be improved somewhat.