MAP_CONTINUUM GAUSS

        [ADVANCED\]MAP_CONTINUUM [DIRTY|CLEAN|Other]  /METHOD  GAUSS  [Threshold
    [Nhist]]

      Compute  the  continuum  based on the per-pixel spectrum. Each spectrum is
    sigma-clipped and the histogram of the intensity distribution is fitted by a
    Gaussian.  Corrective techniques are applied to  ensure  the  fit  has  con-
    verged.   The  position of this Gaussian gives the continuum level.  A noise
    estimate is also derived.

      The method does not deliver a spatially independent noise, but adapts  the
    bandwidth to the line free zones for each pixel. It may fail for pixels that
    are close to line confusion.

      The  optional arguments control the algorithm. Threshold is clipping level
    value for the Gaussian: valuesi n range 2.5 - 4 are  usable  (default  3.5).
    Nhist  is the number of histogram bins. The default is to adjust this number
    depending on the number of channels in the data.