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, they have to be liste
     any order:

    A) an "hour" keyword to indicate the validation hour for the
       coordinates (which is useful when time derivatives are given),
       specified by HOUR Value

    B) A "Parallax" keyword
       PARALLAX Value Value is in arcsec.

    C) a "Velocity" or "Redshift"  keyword
       Velocity|redshift 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. If no keyword is
       present a default frame will be chosen according to the coordinate
       frame

    C') the "REDSHIFT" keyword
        Redshift Value
        Value is the redshift value.
        The user may provide a redshift OR a velocity, not both.

    D) 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

    E) Additional magnitudes keywords
       Mx  Value
       Additional magnitude can be given in the V,R,I,J,H,K,L,M,N bands