first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C X 0.639000 0.342000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT C X 0.640000 0.343000 Bus-DeMeo VIS Erasmus 2018ApJS..237...19E PHOT