TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1723 SUBJECT: GRB021201, BVRcIc field photometry DATE: 02/12/04 19:10:51 GMT FROM: Arne A. Henden at USNO/USRA A. Henden (USRA/USNO) reports on behalf of the USNO GRB team: We have acquired shallow BVRcIc all-sky photometry for a 20x20 arcmin field centered at the IPN coordinates for GRB021201 (Hurley et al., GCN 1719) with the USNOFS 1.0-m telescope on one photometric night. Stars brighter than V=13.0 are saturated and should be used with care. We have placed the photometric data on our anonymous ftp site: ftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb021201.dat The astrometry in this file is based on linear plate solutions with respect to UCAC2. The external errors are less than 100mas. If an afterglow is discovered, we will extend this calibration with additional nights to ensure against a systematic zeropoint error, and to include U-band measures. You should check the dates on the .dat file prior to final publication to get the latest photometry.