TITLE: GCN GRB OBSERVATION REPORT NUMBER: 530 SUBJECT: BATSE+IPN location of GRB000131 DATE: 00/02/03 00:02:02 GMT FROM: R. Marc Kippen at BATSE/UAH/MSFC R. M. Kippen (UAH/MSFC) reports on behalf of the BATSE GRB Team: GRB000131 was detected by BATSE as trigger #7975 at 53877.497 s UT on 2000 January 31. BACODINE/GCN locations were not issued because the trigger began in a real-time telemetry gap. The burst lasts more than 100 s and is therefore undoubtedly the same event detected by KONUS, Ulysses and NEAR (GCN 529) some 76 s after the BATSE trigger time (corresponding to the brightest pulse of the burst). The final BATSE location is (R.A., Dec. J2000) = (94.0, -52.0 deg), with a total (statistical + systematic) error radius of 2.3 deg (68% Conf.). This location rules out one of the two possible IPN error boxes (GCN 529), which means that the most probable combined BATSE+IPN error-box is: RA(2000) DEC(2000) ERROR BOX CENTER: 6 h 13 m 32.72 s -51 o 55 ' 36.77 " ERROR BOX CORNER 1: 6 h 13 m 8.83 s -52 o 2 ' 20.83 " ERROR BOX CORNER 2: 6 h 13 m 25.43 s -51 o 50 ' 11.43 " ERROR BOX CORNER 3: 6 h 13 m 40.09 s -52 o 1 ' 1.94 " ERROR BOX CORNER 4: 6 h 13 m 56.59 s -51 o 48 ' 52.07 " The center of this box is within about 0.4 deg of the independent BATSE location centroid. -eof-