first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C S 0.0178 0.1260 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S S 0.2744 0.1260 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT