TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3372 SUBJECT: GRB050505: Infrared observations DATE: 05/05/06 14:58:07 GMT FROM: Evert Rol at U.Leicester E. Rol (U. of Leicester), N. Tanvir (U. of Hertfordshire), A. Levan (U. of Leicester), A. Adamson, L. Fuhrman (JAC), R. Priddey, R. Chapman (U. of Hertfordshire) report: We have observed the error circle of GRB050505 (GCN 3360) in K-band with the WFCAM instrument on UKIRT. At the position of the optical candidate (GCN 3366), we clearly detect a point-like source, presumably the infrared counterpart. Relative to 2MASS stars in the frame we measure a provisional magnitude of K = 18.1 +/- 0.2 (error includes allowance for possible systematics), 6.82 hours after the burst trigger (mid-exposure time).