TITLE: GCN CIRCULAR NUMBER: 8011 SUBJECT: VLA radio upper limit on GRB 080721 DATE: 08/07/24 14:13:47 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 optically bright GRB 080721 (GCN 7988) at a frequency of 8.46 GHz on 2008 July 24.15 UT. The GRB radio afterglow is undetected and the peak radio flux at the UVOT afterglow position (GCN 7988) is 93 ± 48 uJy. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."