TITLE: GCN GRB OBSERVATION REPORT NUMBER: 857 SUBJECT: GRB 001018, Possible Radio Afterglow DATE: 00/10/21 06:03:17 GMT FROM: Greg Taylor at NRAO G. B. Taylor (NRAO) reports on behalf of a larger collaboration: "We imaged the IPN error box of GRB001018 (GCN #853) with the VLA at 8.46 GHz, starting on Oct. 19.88 UT. A second observation was obtained starting on Oct. 20.76 UT. One unresolved radio source (size < 0.25 arcsec) is detected within the IPN error box at (J2000) R.A.= 13 14 12.385, Dec. =11 48 57.90 with an error of approximately 50 mas in each coordinate. The VLA flux density at 8.46 GHz was 258 +/- 65 microJy on Oct 19.88, and 405 +/- 50 microJy on Oct 20.76. No source is detected in the NRAO VLA Sky Survey (NVSS; Condon et al. 1998, AJ, 115, 1693) above their flux limit of 1 mJy at 1.4 GHz. Based on its compact and possibly variable nature we suggest that the source VLA J1314+1148 could be the radio afterglow from G001018. Further observations with the VLA are planned." This message may be cited.