gaussian_sigma_width

specutils.analysis.gaussian_sigma_width(spectrum, regions=None, analytic=True)

Estimate the width of the spectrum using a second-moment analysis.

The value is scaled to match the sigma/standard deviation parameter of a standard Gaussian profile. This will be calculated over the regions, if they are specified.

Parameters:

spectrumSpectrum1D

The spectrum object over which the width will be calculated.

regions: `~specutils.SpectralRegion` or list of `~specutils.SpectralRegion`

Region within the spectrum to calculate the gaussian sigma width. If regions is None, computation is performed over entire spectrum.

analyticbool, optional

Set this flag to False to use the uncertainty distribution-based calculation for the width and its uncertainty instead of the default analytic solution.

Returns:

approx_sigma: Quantity or list (based on region input)

Approximated sigma value of the spectrum

Notes

The spectrum should be continuum subtracted before being passed to this function.