first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C V 0.0174 0.0060 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT V V 0.0305 0.0060 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT