first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S D 0.842000 0.158000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT S D 0.845000 0.155000 Bus-DeMeo VIS Erasmus 2018ApJS..237...19E PHOT