moment

specutils.analysis.moment(spectrum, regions=None, order=0, axis=-1)

Estimate the moment of the spectrum.

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.

orderint

The order of the moment to be calculated. Default=0

axisint

Axis along which a moment is calculated. Default=-1, computes along the last axis (spectral axis).

Returns:

moment: float or list (based on region input)

Moment of the spectrum. Returns None if (order < 0 or None)