GCN Circular 1850
D.W. Fox (Caltech) and P.A. Price (RSAA/ANU) report on behalf of the Caltech-NRAO GRB collaboration: "We have imaged the full corrected localization region of GRB030131 (GCN 1847) with the Palomar 48-inch Oschin Telescope + NEAT camera, in six 120s exposures over 10:42 UT to 11:31 UT on 31 Jan 2003. The summed image from these unfiltered exposures reaches a limiting magnitude of R~21 mag as estimated from the magnitude of several USNO-A2.0 stars in the image. We identify no bright new sources by reference to images from the Second Digitized Sky Survey. We estimate the magnitude of any new source to be R>20 mag at the mean epoch of our observations, 11:16 UT, which is 3.62 hours after the burst. "In particular, the afterglow candidate of Oksanen (GCN 1849) is not present in our image, and we estimate R>21 for the quoted position at this epoch."