qusp.continuum module

Provides classes that represent quasar continuum objects.

class qusp.continuum.Continuum

Bases: object

Abstract base class for quasar continuum objects.

get_continuum(target, combined)

Returns a SpectralFluxDensity object that represent’s the specified target’s unabsorbed continuum.

Parameters:

• target (qusp.target.Target) – the target
• combined (qusp.spectrum.BOSSSpectrum) – the target’s combined spectrum

class qusp.continuum.LinearFitContinuum(specfits)

Bases: qusp.continuum.Continuum

An interface to linearized continuum fit results file.

Parameters:specfits (str) – name of linearized continuum fit results file.

get_continuum(target, combined)

Returns a SpectralFluxDensity object that represent’s the specified target’s unabsorbed continuum.

Parameters:

• target (qusp.target.Target) – the target
• combined (qusp.spectrum.BOSSSpectrum) – the target’s combined spectrum

Raises:

ValueError – if target is not found in fit results.

class qusp.continuum.MeanFluxContinuum(wave_min=None, wave_max=None)

Bases: qusp.continuum.Continuum

A simple continuum estimate calculated using the mean flux for a quasar.

Parameters:

• wave_min (float) – Optional rest frame wavelength for lower bound of mean flux calculation.
• wave_max (float) – Optional rest frame wavelength for upper bound of mean flux calculation.

get_continuum(target, combined)

Returns a SpectralFluxDensity object that represent’s the specified target’s unabsorbed continuum.

Parameters:

• target (qusp.target.Target) – the target
• combined (qusp.spectrum.BOSSSpectrum) – the target’s combined spectrum

Raises:

ValueError – if mean flux <= 0