first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method D D 0.1997 0.1997 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT S 0.859000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT