TITLE: GCN CIRCULAR NUMBER: 6895 SUBJECT: GRB 071011: P60 Optical Afterglow Candidate DATE: 07/10/11 23:17:00 GMT FROM: S. Bradley Cenko at Caltech S. B. Cenko (Caltech) reports on behalf of a larger collaboration: We have imaged the field of GRB071011 (Marshall et al.; GCN 6882) with the automated Palomar 60-inch telescope (P60). Observations began at 12:43:38 UT on October 11 (205 s after the burst) and we were able to obtain 3 x 60 s images in the R, i', and z' filters before closing due to twilight. Based on comparison with the Digital Sky Survey plates, we do not find any new sources inside the XRT error circle (Sbarufatti et al.; GCN 6891), as was reported by Swan et al. (GCN 6894). However, slightly outside the XRT error circle (~ 8" away), we detect a stationary, fading source at coordinates (J2000.0): RA: 00:33:32.74 Dec: +61:08:04.4 In our initial R-band exposure, we measure a magnitude of R=17.92, using several stars from the USNO-B catalog for photometric calibration. The source fades by over a magnitude in each filter over the duration of our observations. We therefore consider this likely to be the optical afterglow of GRB071011.