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Fig. 8

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Posterior distributions from retrievals of model atmospheres of HD 189733b, HD 209458b, and HD 97658b for an input C2H2 abundance of 10−6 (orange) andC2H4 and CH4 in their respective equilibrium abundances (purple). The results using a variety of instruments are given. The model input abundance is indicated by a black line, which is not shown when lower than the presented range.

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