first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S S 0.4894 0.4850 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT X S 0.0174 0.4850 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT