first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C C 0.0371 0.0350 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S 0.992000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT