TITLE: GCN CIRCULAR NUMBER: 2473 SUBJECT: GRB 031203: Radio detection DATE: 03/12/06 13:28:21 GMT FROM: Dale A. Frail at NRAO D. A. Frail (NRAO) reports on behalf of a larger collaboration: "Using the Very Large Array at 8.5 GHz, we imaged a 2-arcminute radius near the X-ray source S1, detected by the XMM (GCN#2464) within the INTEGRAL error circle (GCN#2459). A single radio source is detected close to the center of S1 at (J2000), r.a. = 08:02:30.22, dec. = -39:51:02.8, with conservative errors of +/-0.4 arcsec. This source is not detected in the NRAO VLA Sky Survey at 20-cm. The flux density of this source is 0.5 mJy - typical for GRB afterglows. We caution that the flux calibration at this stage is only preliminary. The coincidences between the INTEGRAL position, and the position of the XMM-S1 and VLA sources, argues for a real association. We will be undertaking further observations to test whether the radio source is the afterglow of GRB 031203."