Working with Filters

Python-FSPS provides simple access to FSPS’s filter set. To find what filters are available, use fsps.find_filter() or fsps.list_filters() (see also Table of FSPS Filters). fsps.get_filter() is used to get a fsps.filters.Filter instance, which in turn provides properties such as the filter’s transmission curve, Solar absolute magnitude, and effective wavelength.

Example

>>> import fsps
>>> fsps.find_filter('sdss')
['sdss_u', 'sdss_g', 'sdss_i', 'sdss_r', 'sdss_z']
>>> g = fsps.get_filter('sdss_g')
>>> g.msun_ab
5.12
>>> g.lambda_eff
4702.5

API Reference

fsps.find_filter(band)

Find the FSPS name for a filter.

Usage:

>>> import fsps
>>> fsps.find_filter("F555W")
['wfpc2_f555w', 'wfc_acs_f555w']

Parameters:

band – Something like the name of the band.

fsps.list_filters()

Returns a list of all FSPS filter names.

Filters are sorted by their FSPS index.

fsps.get_filter(name)

Returns the fsps.filters.Filter instance associated with the filter name.

Parameters:

name – Name of the filter, as found with find_filter().

class fsps.filters.Filter(index, name, fullname)

property lambda_eff

Effective wavelength of Filter, in Angstroms.

property msun_ab

Solar absolute magnitude in Filter, AB zeropoint.

property msun_vega

Solar absolute magnitude in Filter, VEGAMAG zeropoint.

property transmission

Returns filter transmission: a tuple of wavelength (Angstroms) and an un-normalized transmission arrays.