first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method K S 0.2304 0.3940 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S S 0.7399 0.3940 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT