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Table 2

Retrieved atmospheric (log) abundances as volume mixing ratios.

Retrieval Instrument H2O CH4 CO CO2 NH3
Z19-freea WFC3 2.870.08+0.08$-2.87^{+0.08}_{-0.08} $ 2.750.10+0.12$-2.75^{+0.12}_{-0.10} $ 3.3$-3.3 $ 4.1$-4.1 $ 4.210.09+0.10$-4.21^{+0.10}_{-0.09} $
Z19-constr.b WFC3 2.970.12+0.09$-2.97^{+0.09}_{-0.12} $ 2.890.13+0.12$-2.89^{+0.12}_{-0.13} $ 3.79$-3.79 $ 3.83$-3.83 $ 4.340.13+0.12$-4.34^{+0.12}_{-0.13} $
This workc WFC3 + GNIRS + MIRI 2.860.11+0.11$-2.86^{+0.11}_{-0.11} $ 2.720.15+0.14$-2.72^{+0.14}_{-0.15} $ 4.490.18+0.18$-4.49^{+0.18}_{-0.18} $ 6.870.31+0.25$-6.87^{+0.25}_{-0.31} $ 4.20.12+0.12$-4.2^{+0.12}_{-0.12} $

Notes. Log abundances are expressed units of volume mixing ratios. (a)Called the “free” model with 31 parameters. This incorporates a 80 MJup mass prior upper limit. The 3σ upper limits are from Table 4 of Zalesky et al. (2019). (b)Called the “constrained” model, also with 31 parameters. Here the previously used upper mass limit is removed and restraints are applied on the priors of radius and log g, as 0.7 < R/RJup < 2.0 and 3.5 < log(g) < 5.5, respectively. The 3σ upper limits are computed from the marginal posteriors obtained by Zalesky et al. (2019). (c)3σ upper limits computed from the marginal posteriors obtained in our work. The volume mixing ratios in this work were calculated by converting the mass fractions from the cloud-free retrieval.

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