first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S 0.933000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT S S 0.6695 0.6695 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT