NRA) VLA Sky Survey

 Short name[s] used to specify survey: NVSS,N-VSS

Description
SkyView has copied the NVSS intensity data from the NRAO FTP site. The full NVSS survey data includes information on other Stokes parameters.

Observations for the 1.4 GHz NRAO VLA Sky Survey (NVSS) began in 1993 September and should cover the sky north of -40 deg declination (82% of the celestial sphere) before the end of 1996. The principal data products are:

  1. A set of 2326 continuum map "cubes," each covering 4 deg X 4 deg with three planes containing Stokes I, Q, and U images. These maps were made with a relatively large restoring beam (45 arcsec FWHM) to yield the high surface-brightness sensitivity needed for completeness and photometric accuracy. Their rms brightness fluctuations are about 0.45 mJy/beam = 0.14 K (Stokes I) and 0.29 mJy/beam = 0.09 K (Stokes Q and U). The rms uncertainties in right ascension and declination vary from 0.3 arcsec for strong (S > 30 mJy) point sources to 5 arcsec for the faintest (S = 2.5 mJy) detectable sources.
  2. Lists of discrete sources.
The NVSS is being made as a service to the astronomical community, and the data products are being released as soon as they are produced and verified.

The NVSS survey is included on the SkyView High Resolution Radio Coverage map. This map shows coverage on an Aitoff projection of the sky in equatorial coordinates.

Provenance National Radio Astronomy Observatory. The NVSS project includes J. J. Condon, W. D. Cotton, E. W. Greisen, Q. F. Yin, R. A. Perley (NRAO), and J. J. Broderick (VPI).
Copyright Copyright 1994, Associated Universities, Inc., National Radio Astronomy Observatory

Permission is granted for publication and reproduction of this material for scholarly, educational, and private non-commerical use. 1994 Associated Universities, Inc. Inquiries for potential commercial uses should be addressed to: NRAO 520 Edgemont Road Charlottesville, VA 22903-2475

Regime Radio
NSurvey 1
Frequency 1.4 GHz Continuum
Bandpass 1.3628 - 1.4472 GHz
Coverage Declinations @gt; -40
PixelScale 15"/pixel
PixelUnits Janskies/beam
Resolution 45"
Coordinates Equatorial
Equinox 2000
Projection Orthographic
Epoch 1993-1997
Reference NVSS home page Condon et al. 1998 (ADS)