GCN Circular 4784
N. Mirabal (U. Michigan) reports on behalf of the MDM Observatory GRB follow-up team: "I observed the candidate optical afterglow of Swift GRB 060218 detected by the Swift UVOT (Cusumano et al. GCN #4775, Marshall et al. GCN #4779, Quimby et al. GCN #4782) with the MDM 2.4m telescope and RETROCAM imager under partly cloudy conditions. Calibration with SDSS pre-burst observations (Cool et al. GCN #4777) yields r = 17.55 +/- 0.1 on Feb. 19.1438 UT for the OT. This is brighter than the pre-burst observations and confirms it as the OT of GRB 060218."