first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method K 0.574 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT K K 0.3741 0.3741 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT