SOURCE

        [ASTRO\]SOURCE [name [...]] [/DRAW  [Arg1  ...  ArgN]]  [/ALTERNATE]
    [/SUN] [/FLUX Fmin Fmax] [/RESET] [/DOPPLER] [/CURSOR]
    [ASTRO\]SOURCE /VARIABLE VarName [/ALTERNATE] [/FLUX Fmin Fmax]

    Compute the coordinates of a source from the current catalog (or the al-
    ternate catalog, if the option /ALTERNATE is used). If no name is speci-
    fied,  all  sources  of the catalog are selected. Source coordinates may
    also be directly specified in the command line, in the  same  format  as
    the  catalog  file.  The /DRAW option is used to draw the source name on
    the plot at its current position (Azimuth, Elevation).

    The source coordinates (azimuth and elevation at  time  of  computation)
    are  printed  on  the screen, as well as the line-of-sight components of
    the following velocities:
      - V(S/OBS)
        Source (S) relative to Observatory
      - V(S/LSR)
        Source (S) relative to Local Standard of Rest. This is the  LSR  ve-
        locity furnished by the observer as part of the source coordinates.
      - V(LSR/G)
        Local Standard of Rest relative to Solar System Barycenter (G)
      - V(G/OBS)
        Solar System Barycenter (G) relative to the Observatory
    All velocities are in km/s, positive if the distance is increasing. With
    the above convention,  V(S/OBS)  =  V(S/LSR)+V(LSR/G)+V(G/OBS).  Coordi-
    nates, velocities, and redshift are written in SIC variables, in the AS-
    TRO%SOURCE% structure (just type EXAMINE ASTRO%SOURCE% to get  the  com-
    plete list).

    The  output of the SOURCE command can be modified with the following op-
    tions: SOURCE /SUN will also  list  the  sun  avoidance  limits;  SOURCE
    /PRINT suppresses the printing of Azimuth, Elevation, and the velocities
    and prints the source properties as in catalog; SOURCE /QUIET suppresses
    all  printout (useful to avoid too many messages on the screen in e.g. a
    loop on many sources).

    SOURCE /FLUX Fmin Fmax will select only sources with flux  densities  in
    the specified range. Marker sizes will be proportional to the (logarithm
    of the) flux. This is useful to, e.g., filter a list of potential  cali-
    brators.

    SOURCE /RESET will nullify all internal source parameters and remove the
    ASTRO%SOURCE%VARIABLE.