first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S S 0.5771 0.5550 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT V S 0.3606 0.5550 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT