Fig. 2
The synthetic spectra for CO (dashed line, column density = 3 × 1021 cm-2) and C2H2 (thin solid line, column density = 1019 cm-2) from the HITRAN database and Rothman et al. (2009). The combined spectrum (thick solid line) used to model the molecular contribution to the observed spectrum is also shown. The spectra for CO and C2H2 are shifted down for clarity.
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