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. 2014 Feb 1;14(2):67–86. doi: 10.1089/ast.2013.0990

FIG. 17.

FIG. 17.

Transit transmission spectra of a 1.0 bar, 1.0×PAL O2 Earth analogue with H2O concentrations varying from 0.1×to 10.0×PAL H2O. While H2O absorbs near the wings of the O2 A band, the part-per-million flux difference and the SNR do not change greatly as the H2O concentration changes. The continuum near the 1.06 μm dimer feature is strongly affected by the increases in H2O. However, the magnitude of the change in the part-per-million flux difference over the entire band and the SNR is less than 20% when comparing the 1.0×PAL H2O case to either the 0.1×or 10.0×H2O cases.