GCN Circular 3244
Derek B. Fox (Caltech), S. Bradley Cenko (Caltech), Edo Berger (Carnegie Observatories), and Nidia Morrell (LCO) report on behalf of a larger collaboration: "Examination of our images (GCN 3239) of the GRB 050412 localization region (GCN 3237) reveals a single optical source proximate to the XRT position (GCN 3241). Its coordinates are: RA 12:04:25.0, Dec -01:12:04 (J2000) by reference to USNO B-1.0 catalog astrometry. Due to saturation of bright stars in our images and the faintness of the source, we are not able to perform very accurate photometry at this time; we estimate it to have R >~ 21.5 mag at 55 minutes after the burst. If this source is the one referred to by Jensen et al. (GCN 3243), it is not clear that the source is brighter in our images."