first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S-complex Bus-DeMeo NIR Marsset 2022AJ....163..165M SPEC S 0.710 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT S 1.000000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC