TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4154 SUBJECT: GRB051022: Radio Counterpart DATE: 05/10/24 03:58:57 GMT FROM: Patrick B. Cameron at Caltech P. B. Cameron (Caltech) and D. A. Frail (NRAO) report on behalf of the Caltech-NRAO-Carnegie collaboration: "We observed the field of GRB 051022 (GCN 4131; GCN 4137) with the Very Large Array at 8.5 GHz beginning October 24.09 UT. We find a bright radio source with a flux density of 585 +/- 49 uJy at: RA(J2000) = 23 56 04.1 DEC(J2000) = +19 36 24.1 Within our current astrometric errors (of order 1 arcsec) the source is coincident with Source B (GCN 4143). We intend to refine this position with further observations. We note that there is a nearby, extended radio source whose centroid is located 15 arcsec to the northwest that is also detected in the NVSS survey (Condon et al. 1998, AJ, 115, 1693). However, the point source is clearly offset from the centroid of this extended emission and is not visible in the NVSS. We identify this point source as the likely afterglow from GRB051022. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."