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We present our second paper on the Allen Telescope Array Twenty-centimeterSurvey (ATATS), a multi-epoch, ~700 sq. deg. radio image and catalog at 1.4GHz. The survey is designed to detect rare, bright transients as well as tocommission the ATA's wide-field survey capabilities. ATATS explores thechallenges of multi-epoch transient and variable source surveys in the domainof dynamic range limits and changing (u,v) coverage.  Here we present images made using data from the individual epochs, as well asa revised image combining data from all ATATS epochs. The combined image hasRMS noise 3.96 mJy / beam, with a circular beam of 150 arcsec FWHM. Thecatalog, generated using a false detection rate algorithm, contains 4984sources, and is >90% complete to 37.9 mJy. The catalogs generated from snapshotimages of the individual epochs contain between 1170 and 2019 sources over the564 sq. deg. area in common to all epochs. The 90% completeness limits of thesingle epoch catalogs range from 98.6 to 232 mJy.  We compare the catalog generated from the combined image to those fromindividual epochs, and from the NRAO VLA Sky Survey (NVSS), a legacy survey atthe same frequency. We are able to place new constraints on the transientpopulation: fewer than 6e-4 transients / sq. deg., for transients brighter than350 mJy with characteristic timescales of minutes to days. This strongly rulesout an astronomical origin for the ~1 Jy sources reported by Matsumura et al.(2009), based on their stated rate of 3.1e-3 / sq. deg.

The Allen Telescope Array Twenty-centimeter Survey -- A 700-Square-Degree, Multi-Epoch Radio Dataset -- II: Individual Epoch Transient Statistics