TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4473 SUBJECT: GRB 060110: UKIRT K-band observations DATE: 06/01/10 15:35:42 GMT FROM: Nial Tanvir at IofA U.Cambridge N.R. Tanvir, A.J Levan (U. Hertfordshire), F. Nakata (U. Durham) and L. Fuhrman (JACH) report on behalf of a larger collaboration: We observed the field of GRB 060110 with UKIRT/WFCAM. A 21 min K-band exposure was made in ~1.1 arcsec seeing, starting Jan 10 08.47 UT (ie. approximately 45 minutes post-burst). The source reported by Bloom et al. (GCN 4465) is clearly detected in our images, and provisional photometry relative to nearby 2MASS stars gives K=13.75+/-0.10. Compared to the magnitudes reported by Bloom (GCN 4471), the source appears to have faded, although the errors are such that a constant brightness is not strongly rejected. Further observations are in progress.