TITLE: GCN CIRCULAR NUMBER: 7840 SUBJECT: GRB 080603B: VLA radio upper limit DATE: 08/06/06 17:38:37 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 080603B (GCN 7794) at a frequency of 8.46 GHz on 2008 June 05.16 UT. The GRB radio afterglow is undetected and the peak radio flux at the SWIFT-UVOT position (GCN 7794) is 11 ± 41 uJy. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."