TITLE: GCN CIRCULAR NUMBER: 7481 SUBJECT: GRB 080319B: WSRT Radio Observations DATE: 08/03/20 10:56:40 GMT FROM: Alexander van der Horst at NASA/MSFC A.J. van der Horst (NASA/ORAU) reports on behalf of a large collaboration: "We observed the position of the GRB 080319B afterglow at 4.9 GHz with the Westerbork Synthesis Radio Telescope at March 19 20.24 UT to March 20 8.22 UT, i.e. 14.0 - 26.0 hours after the burst (GCN 7427). We do not detect a radio source at the position of the optical counterpart (GCN 7428). The three-sigma rms noise in the map around that position is 84 microJy per beam. The formal flux measurement for a point source at the position of the optical counterpart is 59 +/- 26 microJy. We would like to thank the WSRT staff for rapidly scheduling and obtaining these observations."