SourceSpectrum¶
- class synphot.spectrum.SourceSpectrum(modelclass, z=0, z_type='wavelength_only', **kwargs)[source]¶
Bases:
BaseSourceSpectrumClass to handle source spectrum.
- Parameters:
- modelclass, kwargs
See
BaseSpectrum.- znumber
Redshift to apply to model.
- z_type{‘wavelength_only’, ‘conserve_flux’}
Redshift can be done in one of the following ways:
'wavelength_only'only shifts the wavelength without adjusting the flux. This is the default behavior to be backward compatible with ASTROLIB PYSYNPHOT.'conserve_flux'also scales the flux to conserve it.
Attributes Summary
Model of the spectrum with given redshift.
Redshift of the source spectrum.
Redshift behavior.
Methods Summary
from_file(filename[, keep_neg])Create a spectrum from file.
from_vega(**kwargs)Load Vega spectrum.
plot([wavelengths, flux_unit, area, vegaspec])Plot the spectrum.
to_fits(filename[, wavelengths, flux_unit, ...])Write the spectrum to a FITS file.
Attributes Documentation
- model¶
Model of the spectrum with given redshift.
- z¶
Redshift of the source spectrum.
- z_type¶
Redshift behavior.
Methods Documentation
- classmethod from_file(filename, keep_neg=False, **kwargs)[source]¶
Create a spectrum from file.
If filename has ‘fits’ or ‘fit’ suffix, it is read as FITS. Otherwise, it is read as ASCII.
- Parameters:
- filenamestr
Spectrum filename.
- keep_negbool
See
Empirical1D.- kwargsdict
Keywords acceptable by
read_fits_spec()(if FITS) orread_ascii_spec()(if ASCII).
- Returns:
- sp
SourceSpectrum Empirical spectrum.
- sp
- classmethod from_vega(**kwargs)[source]¶
Load Vega spectrum.
- Parameters:
- kwargsdict
Keywords acceptable by
read_remote_spec().
- Returns:
- vegaspec
SourceSpectrum Empirical Vega spectrum.
- vegaspec
- plot(wavelengths=None, flux_unit=None, area=None, vegaspec=None, **kwargs)[source]¶
Plot the spectrum.
Note
Uses
matplotlib.- Parameters:
- wavelengthsarray-like,
Quantity, orNone Wavelength values for integration. If not a Quantity, assumed to be in Angstrom. If
None,self.wavesetis used.- flux_unitstr,
Unit, orNone Flux is converted to this unit for plotting. If not given, internal unit is used.
- area, vegaspec
See
convert_flux().- kwargsdict
See
BaseSpectrum.plot().
- wavelengthsarray-like,
- Raises:
- synphot.exceptions.SynphotError
Invalid inputs.
- to_fits(filename, wavelengths=None, flux_unit=None, area=None, vegaspec=None, **kwargs)[source]¶
Write the spectrum to a FITS file.
- Parameters:
- filenamestr
Output filename.
- wavelengthsarray-like,
Quantity, orNone Wavelength values for sampling. If not a Quantity, assumed to be in Angstrom. If
None,self.wavesetis used.- flux_unitstr,
Unit, orNone Flux is converted to this unit before written out. If not given, internal unit is used.
- area, vegaspec
See
convert_flux().- kwargsdict
Keywords accepted by
write_fits_spec().