TITLE: GCN GRB OBSERVATION REPORT NUMBER: 613 SUBJECT: GRB000313, Radio observations DATE: 00/03/15 15:36:37 GMT FROM: Edo Berger at Caltech E. Berger (Caltech) and D. A. Frail (NRAO) report on behalf of a larger collaboration: "Beginning on March 15.57 UT we used the VLA to observe a field centered at the position of the optical transient reported by Castro-Tirado, et al (GCN 612). There are no radio sources brighter than a 3-sigma level of 205 microJy at 8.46 GHz within a radius of 20" from the location of the optical transient. Further observations are planned." This message may be cited.