first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C C Movis NIR Popescu 2018A&A...617A..12P PHOT P 1.000000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC Xk Bus-DeMeo VISNIR Clark 2010JGRE..115.6005C SPEC