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Table 2

Properties of our spectroscopic indices.

Index Bandpass feature λmin (μm) λmax (μm) Bandpass “continuum” λmin (μm) λmax (μm)

C2U C2U_band 0.5087 0.5167 C2U_cont 0.5187 0.5267
CN W110 1.0970 1.1030 W108 1.0770 1.0830
DIP153 DIP153_band 1.5000 1.6000 DIP153_cont 1.4800 1.5000
COH52 COH52_band 1.5974 1.6026 COH52_cont 1.5914 1.5966
COH63 COH63_band 1.6174 1.6226 COH63_cont 1.6114 1.6166
C2 C2_band 1.7680 1.7820 C2_cont 1.7520 1.7620
CO12 KH86CO1 2.2931 2.2983 KH86c1 2.2873 2.2925
CO13 KH86CO3 2.3436 2.3488 KH86CO2 2.3358 2.3410

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