first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C S 0.0381 0.0480 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S S 0.0742 0.0480 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT