first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method Q Bus-DeMeo NIR Marsset 2022AJ....163..165M SPEC Q S 0.600000 0.400000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC S-complex Bus-DeMeo NIR Marsset 2022AJ....163..165M SPEC S Q 0.650000 0.280000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC