first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S S 0.6718 0.6718 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT X 0.516 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT