first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C V 0.0304 0.0930 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT V V 0.1492 0.0930 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT