first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C C 0.1002 0.1002 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT X 0.582 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT