fit_lines

specutils.fitting.fit_lines(spectrum, model, fitter=<astropy.modeling.fitting.LevMarLSQFitter object>, exclude_regions=None, weights=None, window=None)

Fit the input models to the spectrum. The parameter values of the input models will be used as the initial conditions for the fit.

Parameters:

spectrum : Spectrum1D

The spectrum object over which the equivalent width will be calculated.

model: `~astropy.modeling.Model` or list of `~astropy.modeling.Model`

The model or list of models that contain the initial guess.

exclude_regions : list of SpectralRegion

List of regions to exclude in the fitting.

weights : list (NOT IMPLEMENTED YET)

List of weights to define importance of fitting regions.

window : SpectralRegion or list of SpectralRegion

Regions of the spectrum to use in the fitting. If None, then the whole spectrum will be used in the fitting.

Returns:

models : Compound model of Model

A compound model of models with fitted parameters.

Notes

• Could add functionality to set the bounds in model if they are not set.

• The models in the list of model are added

  together and passed as a compound model to the Fitter class instance.