TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4367 SUBJECT: GRB051221: K-band source DATE: 05/12/21 05:28:42 GMT FROM: Josh Bloom at UC Berkeley J. S. Bloom (UC Berkeley) reports: Following the discovery of the XRT position of GRB 051221 (Burrows GCN 4366), we inspected our PAIRITEL mosaics (GCN 4365) and found a faint, red source to the south of the XRT position by 3.2 arcsec with the coordinates: 21:54:48.65, +16:53:25.1 Photometry and improved astrometry are still in progress. A finding chart will be posted to http://astro.berkeley.edu/~jbloom/grb051221-xrt.ps