first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method B B 0.4462 0.4460 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT C 0.398 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT