GCN Circular 2325
GRB030723: Upper limits from historical observations. W. M. Wood-Vasey, Lawrence Berkeley National Laboratory, using images obtained by R. Bambery, S. Pravdo, M. Hicks, and K. Lawrence (Near-Earth Asteroid Tracking project, Jet Propulsion Laboratory), reports historical upper limits for the optical transient for GRB 030723 of Fox et. al (GCN #2323) from images taken with the Palomar Oschin 1.2-m telescope from 2001 Aug 30 -- 2002 Sep 9. A co-addition of these images (taken 2001 Aug 30, Oct 8, 2002 Jul 29, Aug 13, Aug 20, Sep 9) shows nothing at this location to a combined limiting unfiltered magnitude of 21.62 (S/N = 3). The co-addition is available at: http://supernova.lbl.gov/~wwoodvas/GRB/#GRB030723 The quoted magnitude represents a calibration of the unfiltered NEAT observations to the observed stars in the 0.25 sq. deg field of the component images to the "red" USNO-A1.0 catalog. This message may be cited. All dates UT.