TITLE: GCN CIRCULAR NUMBER: 6831 SUBJECT: VLA observation of GRB 070923 DATE: 07/09/28 20:55:19 GMT FROM: Poonam Chandra at U Virginia/NRAO P. Chandra (UVA/NRAO) and D. A. Frail (NRAO) report on behalf of the Caltech-NRAO-Carnegie GRB Collaboration: "We observed the field centered on the BAT position of the Swift short hard burst GRB 070923 (GCN#6818) using the VLA at a frequency of 8.46 GHz and starting at 18.70 UT on Sept 28, 2007, about 5 days after the burst. There is no detection of the afterglow at the GRB Swift-BAT position (GCN#6821 )with 2-sigma upper limit of 90 microJy on its flux density. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."