CATALOG

        [DISPLAY\]CATALOG  [?|NONE|FileName [.. [FileNameN]] [/SORT OutFile [In-
    terval]

    Define or list the current  catalog(s)  for  spectral  line  identification.
    With  argument NONE, the active catalogs are discarded.  With no argument or
    argument ?, the command will just list the names of the current catalog(s).

    A catalog is a file in the "Astro" GILDAS format, as used in programs  ASTRO
    or CLASS in the GILDAS suite, or in  the LINEDB\ data format (which requires
    Python binding).

    There can be only ONE Astro catalog connected at a time, and it is exclusive
    of  any LINEDB data bases. On the opposite, there may be several LINDEB data
    bases specified by the CATALOG command.

    At initialization, IMAGER search for $HOME/imager.linedb as default catalog,
    then gag_data:imager.linedb if not found. If the specified catalog does  not
    exist, IMAGER falls back to the gag_data:molecules.dat Astro-format catalog.

    Caution:  although  direct use of the LINEDB\USE command is also possible to
    define the LINEDB catalog(s), this is not recommended as it may result  with
    possible conflicts with an Astro catalog.