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For refcode 1998AJ....115.1693C:
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1998AJ....115.1693C THE NRAO VLA SKY SURVEY J. J. CONDON, W. D. COTTON, E. W. GREISEN, AND Q. F. YIN National Radio Astronomy Observatory,1 520 Edgemont Road, Charlottesville, VA 22903; jcondon@nrao.edu, bcotton@nrao.edu, egreisen@nrao.edu, qyin@nrao.edu R. A. PERLEY AND G. B. TAYLOR National Radio Astronomy Observatory,1 P.O. Box O, Socorro, NM 87801; rperley@nrao.edu, gtaylor@nrao.edu AND J. J. BRODERICK Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061; jjb@vt.edu Received 1997 November 25 ABSTRACT The NRAO VLA Sky Survey (NVSS) covers the sky north of J2000.0 {delta} = -40^deg^ (82% of the celestial sphere) at 1.4 GHz. The principal data products are (1) a set of 2326 4^deg^ x 4^deg^ continuum "cubes" with three planes containing Stokes I, Q, and U images plus (2) a catalog of almost 2 x 10^6^ discrete sources stronger than S ~ 2.5 mJy. The images all have {theta} = 45" FWHM resolution and nearly uniform sensitivity. Their rms brightness fluctuations are {sigma} ~ 0.45 mJy beam^-1^ ~ 0.14 K (Stokes I) and {sigma} ~ 0.29 mJy beam^-1^ ~ 0.09 K (Stokes Q and U). The rms uncertainties in right ascension and declination vary from <~1" for the N ~ 4 x 10^5^ sources stronger than 15 mJy to 7" at the survey limit. The NVSS was made as a service to the astronomical community. All data products, user software, and updates are being released via the World Wide Web as soon as they are produced and verified. Key words:catalogs-methods: data analysis-methods: observational-radio continuum-surveys
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