first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C 0.980000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC Ch Bus VIS Bus 2002Icar..158..146B SPEC Ds Ds Movis NIR Popescu 2018A&A...617A..12P PHOT