first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method V V 0.5381 0.5400 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT V V 0.5416 0.5400 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT