TITLE:   GCN CIRCULAR
NUMBER:  6705
SUBJECT: VLA non-detection of GRB 070721B
DATE:    07/08/04 02:25:07 GMT
FROM:    Poonam Chandra at U Virginia/NRAO  <pc8s@virginia.edu>

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 070721B (GCN 6640) at a frequency of 8.46 GHz on 2007 Aug 3rd
at 10.42 UT. The radio afterglow of the GRB is undetected either at
Swift-XRT position (GCN 6646) or at ESO-VLT position (GCN 6651). 
The map rms is 29 uJy.


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