TITLE: GCN CIRCULAR NUMBER: 1957 SUBJECT: GRB030323: Upper limits from recent and historical observations. DATE: 03/03/25 22:41:37 GMT FROM: Michael Wood-Vasey at UC Berkeley/LBNL/SNfactory 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 20030323 of Gilmore et. al (GCN #1949) from images taken with the Palomar Oschin 1.2-m telescope during the previous year: UT Date Limiting Unfiltered Mag ( @ S/N = 3) ------------------------------------------------ 2002 Jan 12.56 [ 20.19 2002 Jan 12.57 [ 20.09 2002 Jan 13.57 [ 20.16 2002 Jan 13.58 [ 19.77 2002 Feb 11.36 [ 20.16 2002 Feb 11.38 [ 20.19 2002 Feb 11.40 [ 20.09 2003 Jan 12.53 [ 20.33 2003 Jan 12.55 [ 20.31 2003 Jan 12.56 [ 20.28 2003 Mar 12.38 [ 20.22 2003 Mar 20.30 [ 19.69 A co-addition of these images shows nothing at this location to a combined limiting magnitude of 21.87 (S/N = 3). The co-addition is available at: http://supernova.lbl.gov/~wwoodvas/GRB/#GRB20030323 This message may be cited.