first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method D D 0.3136 0.3136 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S 0.982000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT