TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5529 SUBJECT: GRB 060906 (?): P60 Optical Afterglow Candidate DATE: 06/09/06 09:14:55 GMT FROM: S. Bradley Cenko at Caltech S. B. Cenko, E. O. Ofek (Caltech) and D. B. Fox (Penn State) report on behalf of a larger collaboration: We have imaged the field of Swift trigger 228316 (GRB 060906?) with the automated Palomar 60-inch telescope. Observations were taken in the Kron R filter beginning approximately 12 minutes after the burst. Inside the BAT error circle, we find a stationary object not present in the Digitized Sky Survey at the location (J2000.0): RA: 02:43:00.9 Dec: +30:21:42.12 We estimate the magnitude of the object to be R ~ 19.0, based on comparison with several USNO-B objects in the field. Given the brightness and stationary nature of the object, we consider it a possible optical afterglow. Further observations are underway to search for variability.