TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3847 SUBJECT: GRB050820A: Radio Observation DATE: 05/08/21 19:51:46 GMT FROM: Dale A. Frail at NRAO P. B. Cameron (Caltech) and D. A. Frail (NRAO) report on behalf of a larger collaboration: "We have undertaken VLA observations at a frequency of 8.46 GHz toward GRB 050820A (GCN 3830) on August 20.39 UT and 21.20 UT, about 2.9 hrs and 22.3 hrs after the burst, respectively. On the first epoch no significant radio emission was detected at the position of the optical afterglow (GCN 3829), but on the second epoch a new radio source has appeared with a flux density of 690+/- 41 microJy. Further observations are planned. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."