first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S 0.08 Bus VIS Carvano 2010A&A...510A..43C PHOT S S 0.4941 0.4941 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S X 0.854000 0.144000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT