first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S C 0.532000 0.298000 Bus-DeMeo VIS Erasmus 2018ApJS..237...19E PHOT S C 0.536000 0.294000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT