first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C V 0.0212 0.0100 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S V 0.0253 0.0100 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT