first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method K K 0.4034 0.4034 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S 0.612 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT