The NRAO VLA Sky Survey

Details The NRAO VLA Sky Survey The NRAO VLA Sky Survey

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.6402c&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #64.02; Bulletin of the American Astronomical Society, Vol. 25, p.1389

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Scientific paper

The NRAO VLA Sky Survey (NVSS) is mapping the entire sky north of delta = -40deg at nu = 1.4GHz. A grid of over 2*E(5) partially overlapping snapshot maps will be mosaiced to yield sets of 2326 4deg times 4deg corrected sky images in each of the Stokes parameters I, Q, and U with theta = 45'' FWHM resolution and a nearly uniform 6sigma detection limit S_P ~ 2mJybeam(-1) ~ 0.6K. These images should contain about 2*E(6) extragalactic sources, including luminous radio galaxies and quasars, most of the galaxies found by IRAS at lambda = 60microns, ultraluminous starburst galaxies and protogalaxies even at cosmological distances, as well as statistically useful numbers N >> sqrt {N} of nearby (z << 1) normal galaxies and low-luminosity AGN. Their rms position uncertainties will range from <1'' for S > 10mJy to ~ 5'' at S=2mJy. The NVSS is being made as a service to the astronomical community. We claim no proprietary rights to either the raw data or the finished products because we believe that the full scientific potential of such a large survey will not be realized until all astronomers can use it. The principal data products will be the 4deg times4 deg mosaiced images in FITS format plus ASCII tables of discrete source parameters. They will be released via anonymous ftp (ftp 192.33.115.53, login anonymous, password = your name, cd vlass) as soon as they are made. To guarantee equal access for all users, we will use only those images that have been placed in this open directory for our own research. The NRAO is operated by Associated Universities, Inc., under cooperative agreement with the National Science Foundation.

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