first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C S 0.0432 0.0420 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S S 0.0643 0.0420 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT