first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method V S 0.1218 0.1220 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT X S 0.1875 0.1220 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT