GCN Circular 17104
A.J. van der Horst (University of Amsterdam) reports on behalf of a large collaboration: "We observed the position of the GRB 141121A afterglow at 4.9 GHz with the Westerbork Synthesis Radio Telescope at November 26 22.54 UT to November 27 09.34 UT, i.e. 5.78 - 6.23 days after the burst (GCN 17075). We detect a radio source with a flux density of 0.17 +/- 0.04 mJy at the position of the optical counterpart (GCN 17078). We would like to thank the WSRT staff for scheduling and obtaining these observations."