GCN Circular 6583
Subject
GRB 070612A: Allen Telescope Array Observations
Event
Date
2007-06-27T23:06:44Z (19 years ago)
From
Josh Bloom at UC Berkeley <jbloom@astron.berkeley.edu>
R. Forster, M. Wright, J. Hare, J. S. Bloom, G. C. Bower (UC
Berkeley) report on behalf of a large collaboration:
"Using the Allen Telescope Array (ATA, http://ral.berkeley.edu/ata/),
we observed GRB 070612A (Grupe et al., GCN 6509) at 1.4 GHz on 2007
June 16 UT and at 5 GHz on 2007 June 17 UT. The observations made use
of 8 antennas outfitted with dual-polarization receivers. At the
location of the optical afterglow (Updike et al., GCN 6515), we
obtained 3-sigma limits of 50 mJy at 1.4 GHz and 10 mJy at 5 GHz for
the flux density of GRB 070612A at these epochs. The data were
calibrated versus the QSS 0927+392. At L-band the 8 brightest NVSS
were measured to be located within 10% of the synthesized beamwidth
and 100 mJy of the NVSS flux densities. The limits reported herein
are consistent with the tentative WSRT detection at 4.9 GHz (Horst et
al. GCNs 6549, 6576).
A 42-antenna ATA is currently being commissioned."
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