TITLE: GCN CIRCULAR NUMBER: 5097 SUBJECT: GRB 060510B: MDM Observations and candidate OT DATE: 06/05/10 09:17:40 GMT FROM: Nestor Mirabal at U Michigan N. Mirabal (U. Michigan) and J. P. Halpern (Columbia U.) report on behalf of the MDM Observatory GRB follow-up team: "We have observed the Swift BAT location of GRB 060510 (Krim et al., GCN 5096) with the MDM 1.3m telescope on May 10 08:50 UT, 26 minutes after the trigger. We detect a faint source located at RA:15 56 29.615, Dec: 79 34 13.02 (+/- 2'') in a 600-s I band exposure, which is a potential optical afterglow for this event. The object appears to be fainter than R~22.5 in a previous 600~s exposure. This supports the idea that GRB 060510B could be a high-redshift or highly-reddened burst. Further observations are encouraged. Results here are very preliminary and analysis is in progress. This message may be cited."