TITLE: GCN CIRCULAR NUMBER: 6180 SUBJECT: VLA observation of GRB 070306 DATE: 07/03/08 17:14:33 GMT FROM: Poonam Chandra at U Virginia/NRAO Poonam Chandra (NRAO/UVA) and Dale A. Frail (NRAO) report on behalf of the Caltech-NRAO-Carnegie GRB Collaboration: "We used the Very Large Array to observe the field of view toward GRB 070306 (GCN 6169) at a frequency of 8.46 GHz on 2007 March 8th at 5.22 UT. The GRB is undetected and the 2-sigma upper limit on the peak radio flux at the SWIFT-XRT position (GCN 6172) is 60 uJy (rms 30 uJy). The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."