def _load_data(self, band):
        """From Morrissey+ 2005, with the actual data coming from
        http://www.astro.caltech.edu/~capak/filters/. According to the latter,
        these are in QE units and thus need to be multiplied by the wavelength
        when integrating per-energy.

        """
        # `band` should be 'nuv' or 'fuv'
        df = bandpass_data_frame('filter_galex_' + band + '.dat', 'wlen resp')
        df.resp *= df.wlen # QE -> EE response convention.
        return df