TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1771 SUBJECT: IPN triangulation of GRB021219 DATE: 02/12/19 22:27:31 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the Ulysses GRB team, and D.Gotz (IASF-Milano), P.Favre (ISDC), S.Mereghetti (IASF-Milano), J.Borkowski (ISDC), and the INTEGRAL Science Working team, report: This burst (GCN 1766, 1767, 1768) was also observed by Ulysses. Although the INTEGRAL timing is still undergoing refinement, we have triangulated it assuming a systematic uncertainty of 100 ms, which is supported by recent SGR observations. The preliminary annulus is centered at RA, Decl(2000)= 182.935, 36.337 degrees, with radius 78.549 +/- 0.023 degrees (3 sigma ). This annulus intersects the INTEGRAL error circle given in GCN 1768 at two points: RA DEC 282.557459=18 H 50 M 13.79 S 31.832096= 31 o 49' 55" 282.642596=18 H 50 M 34.22 S 31.932013= 31 o 55' 55" This reduces the error box size to about 15 square arcminutes. This annulus may be improved. A map has been posted at ssl.berkeley.edu/ipn3/021219.