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Table 2

Wavelength regions used for our analysis. The reference optical depth, τ0, was computed at λ = 5000 Å from K20.

Region Wavelength [µm] log τ0
Continuum 2.22–2.28 –0.65 < log τ0 ≲ 0.25c
Ti I and Sc I 2.18–2.22a –1.75 < log τ0 < –1.00
H2O 1.98–2.05 –1.75 < log τ0 < –1.00
12C16O (2-0) 2.29b –3.00d < log τ0 < –2.10
12C16O(3-1) 2.32b –3.00d < log τ0 < –2.10
12C16O (4-2) 2.35b –3.00d < log τ0 < –2.10
12C16O (5-3) 2.38b –3.00d < log τ0 < –2.10

Notes. a Only lines in the indicated region were selected. b Minimum |V|2 value in the band head. cThe optical depth range corresponds to weak unresolved lines from the innermost layer from K20, which may contaminate our continuum. dThe maximum extent of the atmospheric model in K20.

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