Parameters

  Keyword       Posn  Type       Description
  -------       ----  ----       -----------
  INP           1     UNIV       Any 2D dataset.
                - GLOBAL.BINDS (Default binned dataset)
  OUT           2     UNIV       Output file name for background
                                 subtracted image.
                -> GLOBAL.BINDS (Default binned dataset)
  BGND          -     UNIV       Optional background model output.
                - GLOBAL.MODEL (Default model dataset)
      Default = !
  PSF           -     CHAR       Input PSF to use.
  MASK          -     CHAR       If an analytical PSF to be used input
                                 the function from the list.
  AUX           -     CHAR       Used by the analytic function (see PSS).
                                 line?
  SOURCE_THRESH -     REAL       The threshold to remove source from the
                                 image (see "Algorithms").
      Default = 5
  BOX_DIM       -     INTEGER    Dimension of the box in pixels into
                                 which the image is subdivided.
      Default = 30
  SM_FILT       -     CHAR       Selects smoothing filter (top-hat or
                                 Gaussian) for smoothing.
      Default = H
  SM_FWHM       -     REAL       FWHM of smoothing function if Gaussian
                                 filter selected.
      Default = 15
  SMOOTH_BORDER -     LOGICAL    Can apply a sloping border to a top-hat
                                 smoothing function
      Default = N
  SMOOTH_SIZE   -     INTEGER    Limiting dimension of smoothing function
      Default = 25
  OUT_MESSADES  -     LOGICAL    Are messages to be output?
      Hidden default = YES