GCN Circular 9047
A.J. van der Horst (NASA/MSFC/ORAU) reports on behalf of a large collaboration: "We observed the position of the GRB 090323 afterglow at 4.9 GHz with the Westerbork Synthesis Radio Telescope at March 27 17.92 UT to March 28 5.91 UT, i.e. 4.74 - 5.24 days after the burst (GCN 8980). We detect a radio source with a flux density of 105 +/- 24 microJy at the position of the optical counterpart (GCN 9021). We would like to thank the WSRT staff for scheduling and obtaining these observations."