TITLE: GCN CIRCULAR NUMBER: 7506 SUBJECT: Radio Detection of GRB 080319B DATE: 08/03/22 21:08:48 GMT FROM: Alicia Soderberg at Caltech Alicia Soderberg (Princeton), Poonam Chandra (U. Virginia), and Dale Frail (NRAO) report on behalf of a larger collaboration: "We observed the field of GRB 080319B (GCN 7427) with the Very Large Array beginning at Mar 21.56 UT. At 4.86 GHz we detect a radio source coincident with the optical afterglow position (GCN 7428) at coordinates (J2000): RA = 14 31 41.01 +/- 0.05 Dec = 36 18 09.7 +/- 0.4 with flux density 189 +- 39 microJy. Further observations are scheduled. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."