TemplateGrid¶
- class eazy.photoz.TemplateGrid(zgrid, templates, RES='FILTERS.RES.latest', f_numbers=[156], add_igm=True, galactic_ebv=0, Eb=0, n_proc=4, interpolator=None, filters=None, verbose=2, cosmology=None, array_dtype=<class 'numpy.float32'>, tempfilt_data=None)[source]¶
Bases:
object
Integrate filters through filters on a redshift grid
- Parameters:
- zgridarray
Redshift grid
- templateslist
List of
Template
objects- RESstr
Filename of a
FilterFile
, or the object itself.- f_numberslist
List of unit-indexed filter numbers for the desired filters to integrate.
- add_igmbool
Add IGM absorption as a function of redshift
- galactic_ebvfloat
MW extinction \(E(B-V)\)
- Ebfloat
Extra dust bump Drude profile to apply to galactic extinction
- n_procint
Number of parallel processes
- interpolatorNone
See
init_interpolator
- filterslist, optional
Explicit list of filters to bypass
RES
andf_numbers
- verboseint
Some control over status messages
- cosmology
astropy.cosmology
object (Not really used here)
- array_dtypedtype
Data type for computed arrays
- tempfilt_dataarray
Precomputed array of integrated fluxes
- Attributes:
NZ
Number of redshift grid points
NFILT
Number of filters
NTEMP
Number of templates
pivot
Filter pivot wavelengths
- zgridarray (NZ)
Redshfit grid
- trdzarray (NZ)
Array for trapezoid integration as a dot product (see
trapz_dx
)- tempfiltarray (NZ, NTEMP, NFILT)
Templates integrated through filter bandpasses on the redshift grid.
- splineinterpolator
Spline interpolator that interpolates
tempfilt
at a specified redshift
Attributes Summary
Number of filters
Number of objects in catalog
Number of templates
Number of redshift grid points
Filter pivot wavelengths (deprecated, use
pivot
)Filter pivot wavelengths
Methods Summary
__call__
(z)Interpolate filter flux grid at specified redshift
apply_SFH_constraint
([max_mass_frac, ...])Set interpolated template fluxes to zero for a given redshift/tmeplate combination if the accumulated stellar mass fraction at ages older than the age of the universe is greater than
max_mass_frac
.init_interpolator
([interpolator])Initialize filter flux interpolator
Attributes Documentation
- NFILT¶
Number of filters
- NOBJ¶
Number of objects in catalog
- NTEMP¶
Number of templates
- NZ¶
Number of redshift grid points
- pivot¶
Filter pivot wavelengths
Methods Documentation
- apply_SFH_constraint(max_mass_frac=0.5, cosmology=None, sfh_file='templates/fsps_full/fsps_QSF_12_v3.sfh.fits')[source]¶
Set interpolated template fluxes to zero for a given redshift/tmeplate combination if the accumulated stellar mass fraction at ages older than the age of the universe is greater than
max_mass_frac
.Requires the “sfh.fits” file.
Warning
The implementation seems to work but the results when applied to running on a full catalog don’t seem very reliable, probably caused by the effect of clipping out templates at discrete redshifts.
- init_interpolator(interpolator=None)[source]¶
Initialize filter flux interpolator
- Parameters:
- interpolatorNone or a
scipy.interpolate
class. Defaults to
scipy.interpolate.Akima1DInterpolator
which has desirable smooth behavior robust to large curvature in the interpolated data.
- interpolatorNone or a