first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method V V 0.2184 0.2184 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT X D 0.601000 0.169000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT