first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S X 0.1039 0.0640 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT V X 0.0496 0.0640 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT