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11.4.22. astroML.datasets.fetch_sdss_filter

astroML.datasets.fetch_sdss_filter(fname, data_home=None, download_if_missing=True)

Loader for SDSS Filter profiles

Parameters :

fname : str

filter name: must be one of ‘ugriz’

data_home : optional, default=None

Specify another download and cache folder for the datasets. By default all scikit learn data is stored in ‘~/astroML_data’ subfolders.

download_if_missing : optional, default=True

If False, raise a IOError if the data is not locally available instead of trying to download the data from the source site.

Returns :

data : ndarray

data is an array of shape (5, Nlam) first row: wavelength in angstroms second row: sensitivity to point source, airmass 1.3 third row: sensitivity to extended source, airmass 1.3 fourth row: sensitivity to extended source, airmass 0.0 fifth row: assumed atmospheric extinction, airmass 1.0