TITLE: GCN GRB OBSERVATION REPORT NUMBER: 450 SUBJECT: IPN localization of GRB991208 DATE: 99/12/10 00:42:16 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley (UCB SSL), on behalf of the Ulysses GRB team, and T. Cline (NASA GSFC), on behalf of the KONUS and NEAR GRB teams, report: Ulysses, KONUS, and NEAR observed an extremely intense, 60 s long gamma-ray burst on December 8, 1999, at 04:36:52 UT. Preliminary estimates indicate a fluence >25 keV of ~10^-4 erg/cm^2, and considerable flux was observed by NEAR >100 keV. We have localized this burst to a 14 sq. arcmin. error box whose corners are: RA(2000) Decl.(2000) 16 h 33 m 47 s +46 o 27 ' 43 " 16 h 34 m 08 s +46 o 20 ' 19 " 16 h 33 m 43 s +46 o 32 ' 52 " 16 h 34 m 04 s +46 o 25 ' 29 " This error box can be refined considerably.