[AAVSO-HEN] GRB 070724B: P60 Observations

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  6679
SUBJECT: GRB 070724B: P60 Observations
DATE:    07/07/29 02:48:25 GMT
FROM:    S. Bradley Cenko at Caltech  <cenko at srl.caltech.edu>

S. B. Cenko and A. Rau (Caltech) report on behalf of a larger
collaboration:

We have imaged the field of GRB070724B (Feroci et al., GCN 6668), the
first GRB detected by SuperAGILE, with the automated Palomar 60-inch
telescope.  Observations consisted of 5 x 180 s images in the i' filter at
a mean epoch of approximately UT 06:46:30 on 2007 July 26 (~ 31.3 hours
after the burst).  We do not detect any sources inside the error circle of
the likely XRT afterglow (Romano et al., GCN 6675) to a limiting
magnitude of i' > 21.0 (calculated with respect to several USNO-B stars
in the field).