specutils.analysis.line_flux(spectrum, regions=None)[source]

Computes the integrated flux in a spectrum or region of a spectrum.

Applies to the whole spectrum by default, but can be limited to a specific feature (like a spectral line) if a region is given.

spectrum : Spectrum1D

The spectrum object over which the summed flux will be calculated.

regions : SpectralRegion or list of SpectralRegion

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

flux : Quantity

Flux in the provided spectrum (or regions). Unit isthe spectrum’s‘ flux unit times spectral_axis unit.


While the flux can be computed on any spectrum or region, it should be continuum-subtracted to compute actual line fluxes.