CATALOG FORMAT

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CATALOG FORMAT

            In the ASTRO source catalog format each source uses one line of  the
        catalog  file.   Each line should contain the following consecutive key-
        words (some may be omitted):
         1) Source name field:
            The source name field is a composite item which can accomodate several
            names for a single source. Names should be separated by a vertical bar
            ( | ) with no embedded spaces, e.g.: B0415+379|3C111. Each name must
            have at most 12 characters.
         2) Coordinate system: 2 characters, optional, may be:
              EQ for equatorial coordinates. If "EQ" is given explicitely,
                                     then the Equinox value is mandatory.
              GA for Galactic II coordinates.
              EC for J2000 Ecliptic coordinates
              HO for horizontal coordinates
              DA for equatorial, present-day coordinates.
         3) Equinox: needed for equatorial coordinates after "EQ" keyword.
         4) Longitude-like coordinate: in degrees, except for EQ and DA where it
            should be in hours. Format is
                  hh:mm:ss.sss[,first[,second]]
            where
                  "hh:mm:ss.sss" is a generalized sexagesimal format
                    (hh:mm:ss.sss or dd.ddd or hh:mm.mmm)
                  "first" is an (optional) first order time derivative
                  "second" is an (optional) second order time derivative
         5) Latitude-like coordinate: in degrees, same format as above.

         The following OPTIONAL keywords can also be included, and may be listed in
         any order:

         A) a "Velocity" keyword
             Velocity Value
                where "Velocity" is an alphabetic code, equal to "LSR", "HELIO",
                or "EARTH". HELIO actually means: referred to the Solar System
                barycenter. Value is the velocity in km/second, in the corresponding
                reference frame. Default is zero.
         A') the "REDSHIFT" keyword
             Redshift Value
                Value is the redshift value.
                The user may provide a redshift OR a velocity, not both.
         B) an "Intensity" keyword
             FLUX  Value [Index]
                 Value is the flux in Jy. Index is an optional spectral index
             Mx  Value
                 Value is the magnitude, Unknown values can be coded 99.99
                 Mx can be MAGNITUDE, or x is one of V,R,I,J,H,K,L,M,N to indicate
                 the visual band
         C) a "Project" keyword
             PROJECT ProjectID
                to specify a project identification (a string without spaces)
         D) an "hour" keyword to indicate the validation hour for the coordinates
            (which is useful when time  derivatives are given), specified by
             HOUR Value
         E) A "Parallax" keyword
             PARALLAX Value
                  Value is in arcsec.

        Any other keyword will be ignored.