first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method Bk Bk Movis NIR Popescu 2018A&A...617A..12P PHOT C DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT