first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method D D 0.0131 0.0080 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S C 0.536000 0.435000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT