CLEAN

        CLEAN

    This  task    contains    implementations    of    several    CLEAN-like
    deconvolution  algorithm.  The algorithm is selected through the METHOD$
    keyword, which can be :
     SIMPLE    :  The straightforward direct method.
     CLARK     :  The Barry Clark major-minor cycle method.
     MRC       :  a Multi-Resolution Clean.
     THRESHOLD :  Components are not restricted to be point sources.

    The input map and beam should have the  same  sizes,  except   for   the
    SIMPLE  method where different beam sizes are allowed, and must have the
    same grid spacing.  Sources are searched only in the  inner  quarter  of
    the  map,  but  their  sidelobes are removed in the full map.  A smaller
    search box can be specified if desired.

    The program can process all planes of a data cube at the same time,  but
    a   separate  list  of  component  will be produced for each plane.  The
    cleaning cannot be restarted.