fwzi¶
- specutils.analysis.fwzi(spectrum, regions=None)[source]¶
Compute the true full width at zero intensity (i.e. the continuum level) of the spectrum.
This makes no assumptions about the shape of the spectrum. It uses the scipy peak-finding to determine the index of the highest flux value, and then calculates width at that base of the feature.
- Parameters:
- spectrum
Spectrum1D 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 FWZI value. If regions is
None, computation is performed over entire spectrum.
- spectrum
- Returns:
Quantityor list (based on region input)Full width of the signal at zero intensity.
Notes
The spectrum must be continuum subtracted before being passed to this function.