GCN Circular 7507
A.J. van der Horst (NASA/ORAU) reports on behalf of a large collaboration: "We re-observed the position of the GRB 080319B afterglow at 4.9 GHz with the Westerbork Synthesis Radio Telescope at March 21.84 to 22.03 UT and at March 22.84 to 23.03 UT, i.e. 2.7 and 3.7 days after the burst (GCN 7427). We do not detect a radio source at the position of the optical counterpart (GCN 7428) at 2.7 days. The three-sigma rms noise in the map around that position is 108 microJy per beam. We note that this upper limit is not consistent with the almost simultaneous VLA detection at 4.86 GHz reported in GCN 7506. We tentatively detect a radio source at 4 sigma significance at 3.7 days, with a flux density of 163 +/- 39 microJy. We would like to thank the WSRT staff for scheduling and obtaining these observations."