first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S C 0.815000 0.126000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT V V 0.2382 0.2382 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT