TITLE: GCN CIRCULAR NUMBER: 746 SUBJECT: GRB000630, Revised BVRI Field Photometry DATE: 00/07/03 22:03:38 GMT FROM: Arne A. Henden at USNO/USRA A. Henden (USRA/USNO) reports on behalf of the USNO GRB team: We have acquired a second night of BVRcIc all-sky photometry for an 11x11 arcmin field that covers the northern 60 percent of the error box for GRB000630 with the USNOFS 1.0-m telescope. We have placed the revised photometric data on our anonymous ftp site: ftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb000630.dat The current photometry has a potential external zero-point error of less than two percent. The astrometry in this file is based on linear plate solutions with respect to USNO-A2.0. The internal errors are less than 100mas. In particular, the position/magnitudes of the two stars mentioned in Halpern, et al. (GCN 745) have the revised values of: Star RA(2000) Dec(2000) R I ----------------------------------------------------- A 14 47 01.67 +41 16 16.9 17.43 16.87 B 14 46 59.26 +41 15 52.2 18.60 18.14 -----------------------------------------------------