TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1319 SUBJECT: GRB020331 field photometry DATE: 02/04/01 22:53:06 GMT FROM: Arne A. Henden at USNO/USRA A. Henden (USRA/USNO) reports on behalf of the USNO GRB team: We have acquired BVRcIc all-sky photometry for an 11x11 arcmin field centered at the HETE coordinates for GRB020331 (Ricker et al. GCN 1315) with the USNOFS 1.0-m telescope on one photometric night. Stars brighter than V=14.0 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/grb020331.dat The astrometry in this file is based on linear plate solutions with respect to USNO-A2.0. The internal errors are less than 100mas. If an afterglow is detected, we will update this file with additional photometric nights.