first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S D 0.883000 0.110000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT S D 0.883000 0.112000 Bus-DeMeo VIS Erasmus 2018ApJS..237...19E PHOT