TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1968 SUBJECT: GRB030323: Detection on 2003/03/24 DATE: 03/03/27 18:35:44 GMT FROM: Michael Wood-Vasey at UC Berkeley/LBNL/SNfactory W. M. Wood-Vasey (LBNL/UCB), P. A. Price (RSAA/ANU), and D. Fox (Caltech), using images obtained by R. Bambery, S. Pravdo, M. Hicks, and K. Lawrence (Near-Earth Asteroid Tracking project, Jet Propulsion Laboratory), report that an image taken with the Palomar 1.2-m telescope on 2003 Mar 24.27 UT shows the optical transient of Gilmore et. al (GCN #1949) at a unfiltered magnitude of 18.83 +0.09-0.08. Two previous Mar 24 images taken under poor conditions do not show the OT: UT Date Unfiltered Mag ---------------------------------------- 2003 Mar 24.19 [ 16.59 2003 Mar 24.23 [ 16.26 2003 Mar 24.27 18.83 +0.09 -0.08 Magnitudes are calibration against >300 USNO-A V1.0 R-band stars in the 0.25 sq. degree field of the images. We clarify here that the limiting magnitudes quoted in GCN #1957 were calculated in the same manner. This message may be cited.