first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S 0.779 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT X C 0.0296 0.0100 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT