NVSS Survey (VLA D array) Catalog Available (9/95)


   A preliminary release of the NRAO/VLA Sky Survey source catalog is
now available.  The present catalog covers approximately one fifth
of the final area of the survey and contains about 400,000 sources.
Sources are added to the catalog as new images are produced. 

   The NVSS is a survey of the sky north of declination -40 deg at 1.4
GHz with a resolution (FWHM) of 45" and a limiting peak surface
brightness of 2.5 mJy/Beam.  This survey, made with the VLA in the "D"
configuration, is producing images of both total intensity and linear
polarization.  A source catalog consisting of Gaussian fit parameters
is being prepared. 

   The images and source catalog are available via anonymous ftp (URL
ftp://nvss.nrao.edu/pub/nvss/).  In addition, catalog search software
is available.  There is a WWW interface 
(URL http://www.cv.nrao.edu/NVSS/NVSS.html) which is suitable for
searches for individual fields.  In Charlottesville a browser, NVSSlist,
is installed under SunOS (and should also work under Solaris) which
allows more extensive searches.  Fields centered on a list of
positions can be searched.  NVSSlist has on-line documentation as well
as a more extensive description in /opt/local/share/lib/NVSSlist.hlp.