first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C B 0.680000 0.320000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC Cb Bus VIS Bus 2002Icar..158..146B SPEC X 0.734 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT