Статья

The NRAO VLA Sky Survey

J. J. CondonNational Radio Astronomy ObservatoryThe National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc., 520 Edgemont Road, Charlottesville, VA 22903W. D. CottonNational Radio Astronomy ObservatoryThe National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc., 520 Edgemont Road, Charlottesville, VA 22903E. W. GreisenNational Radio Astronomy ObservatoryThe National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc., 520 Edgemont Road, Charlottesville, VA 22903Qiang YinNational Radio Astronomy ObservatoryThe National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc., 520 Edgemont Road, Charlottesville, VA 22903R. A. PerleyNational Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801G. B. TaylorNational Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801J. J. BroderickDepartment of Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

1998en

ABI

Аннотация

The NRAO VLA Sky Survey (NVSS) covers the sky north of J2000.0 δ = -40° (82% of the celestial sphere) at 1.4 GHz. The principal data products are (1) a set of 2326 4° × 4° continuum "cubes" with three planes containing Stokes I, Q, and U images plus (2) a catalog of almost 2 × 106 discrete sources stronger than S ≈ 2.5 mJy. The images all have θ = 45'' FWHM resolution and nearly uniform sensitivity. Their rms brightness fluctuations are σ ≈ 0.45 mJy beam-1 ≈ 0.14 K (Stokes I) and σ ≈ 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 × 105 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.

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Идентификаторы

DOI: 10.1086/300337

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Цитирований: 3Использованных источников: 0

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