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NRAO VLA D-array Sky Survey (NVSS)
The National Radio Astronomy Observatory (NRAO) observed the sky north of declination -40° using the Very Large Array (VLA) (D-array) at the 1.4 GHz frequency. We present the survey in Stockes I parameter, covering 82% of the sky, at an angular resolution of 45“. Units of the map are Jy/beam.
Healpix map made by D. Paradis.