[ADVANCED\]MAP_CONTINUUM [DIRTY|CLEAN|Other] /METHOD GAUSS [Thresh-
old [Nhist]]
Compute the continuum based on the per-pixel spectrum. Each spectrum
is sigma-clipped and the histogram of the intensity distribution is fit-
ted by a Gaussian. Corrective techniques are applied to ensure the fit
has converged. 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 with 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 (de-
fault 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.
Gildas manager
2023-06-01