TITLE:   GCN CIRCULAR
NUMBER:  15227
SUBJECT: GRB 130912A: 5.8 GHz VLA upper limit
DATE:    13/09/13 21:59:59 GMT
FROM:    Wen-fai Fong at CFA  <wfong@cfa.harvard.edu>

W. Fong, B. A. Zauderer and E. Berger (Harvard) report:

"We observed the field of the short-duration GRB 130912A (D'Elia et
al., GCN 15212; Zhang et al., GCN 15219; Golenetskii et al., GCN
15225) with the Karl G. Jansky Very Large Array (VLA) beginning on
2013 Sep 13.26 UT (21.85 hr post-burst) at a mean frequency of 5.8
GHz. In 1 hour of observations, we do not detect any radio source in
coincidence with the optical afterglow (Tanga et al., GCN 15214; Cenko
et al., GCN 15222; Tanvir et al., GCN 15224; Butler et al., GCN 15226)
or within the enhanced XRT position (Beardmore et al., GCN 15217). We
therefore place a 3-sigma limit of 29 microJy on the radio afterglow
of GRB 130912A at 21.85 hr after the burst.

We thank the VLA staff for quickly executing these observations."