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The NRAO VLA Sky Survey

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TLDR
The NRAO VLA Sky Survey (NVSS) covers the sky north of J2000 at 1.4 GHz as discussed by the authors, including a set of 2326 4?? 4? continuum cubes with three planes containing Stokes I, Q, and U images plus a catalog of almost 2? 106 discrete sources stronger than S 2.5 mJy.
Abstract
?????The NRAO VLA Sky Survey (NVSS) covers the sky north of J2000.0 ? = -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 ? = 45'' FWHM resolution and nearly uniform sensitivity. Their rms brightness fluctuations are ? ? 0.45 mJy beam-1 ? 0.14 K (Stokes I) and ? ? 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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References
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Journal ArticleDOI

The FIRST Survey: Faint Images of the Radio Sky at twenty centimeters

TL;DR: The first year of the First Radio Sky at Twenty centimeters (FIRST) survey as discussed by the authors was performed using the NRAO Very Large Array (VLA) with a total of 144 hr of time in 1993 April and May was used for a variety of tests, as well as to cover an initial strip of the survey extending between 07{sup h}15{sup m} and 16{suph}30{supm} in a 2{sq_bullet}8 wide declination zone passing through the local zenith.
Journal ArticleDOI

Ultraluminous infrared galaxies and the origin of quasars

TL;DR: In this article, ground-based observations of a complete sample of 10 of these infrared galaxies suggest that they represent the initial dust-enshrouded stages of quasars, and a second group of ultraluminous objects selected on the basis of warm infrared colors are found to be preferentially Seyfert galaxies.
Journal ArticleDOI

A Catalog of 1.4 GHz Radio Sources from the FIRST Survey

TL;DR: In this article, the authors presented a catalog of 138,665 radio sources derived from the initial 1550 deg2 of the FIRST survey, which they used to construct a log N-log S relation for 20 cm radio sources over four decades of flux density, finding excellent agreement with previous determinations from smaller surveys.
Journal ArticleDOI

The universe at faint magnitudes. I - Models for the galaxy and the predicted star counts

TL;DR: In this article, a detailed model for the disk and spheroid components of the Galaxy from which the distribution of visible stars and mass in the Galaxy is calculated, and the application of star counts to the determination of galactic structure parameters is demonstrated.
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