first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method X C 0.714000 0.177000 Bus-DeMeo VIS Erasmus 2018ApJS..237...19E PHOT X C 0.722000 0.173000 Bus-DeMeo VIS Erasmus 2019ApJS..242...15E PHOT