TITLE: GCN GRB OBSERVATION REPORT NUMBER: 441 SUBJECT: IPN localization of GRB991105 DATE: 99/11/08 22:27:28 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley and T. Cline, on behalf of the NEAR GRB team, and M. Feroci, on behalf of the BeppoSAX GRB team, report: Although GRB991105 (GCN 433) was too weak to be observed by Ulysses, it was observed by NEAR. The preliminary IPN annulus for it is centered at RA=187.6492 deg., Decl.=-7.9319 deg. (J2000), and has a radius of 58.9882 +/- 0.0607 deg. (3 sigma). The annulus width is therefore about equal to the WFC error circle diameter, but it intersects it at: RA(2000) Decl.(2000) 12 h 03 m 52 s -66 o 48' 13" 12 h 02 m 59 s -66 o 47' 30" and therefore reduces the WFC area slightly. A map may be found at ssl.berkeley.edu/ipn3/991105/. Some refinements to this annulus are expected which should further reduce the WFC error circle area.