TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1575 SUBJECT: GRB 021004 radio search DATE: 02/10/05 09:10:27 GMT FROM: Guy Pooley at MRAO, Cambridge, UK The field of GRB 021004 (GCN 1564, 1565) was observed at 15 GHz with the Ryle Telescope from 2002 Oct 04 23:31 to 2002 Oct 05 03:35 UT (about 12 to 15 hours after the detection). The resolution is about 25 x 80 arcsec. No radio source was detected at the position of the OT; the formal value for the flux density was 0.59 +- 0.30[rms] mJy. Another observation is planned. Guy Pooley MRAO, Cavendish Lab, Cambridge UK