TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2521 SUBJECT: GRB040106, follow-up radio observations DATE: 04/01/21 23:11:56 GMT FROM: Dale A. Frail at NRAO D. A. Frail (NRAO), M. Wieringa (ATNF) and A. M. Soderberg (Caltech) report on behalf of a larger collaboration: "On 2004 Jan. 21.48 UT we carried out follow-up observations with the VLA centered on the XMM X-ray source (GCN# 2508,2512) within the INTEGRAL error circle (GCN#2505). We did not detect the ATCA radio source claimed earlier (GCN#2516) in the preliminary XMM error circle. The VLA flux density limits at the position of the revised XMM error circle (GCN#2520) are 4 +/- 50 microJy and -77 +/- 85 microJy, at 8.46 and 4.86 GHz, respectively. No further observations are planned."