Table I.1.
Retrieved atmospheric parameters and prior probability distributions.
| Parameter | Bayesian Prior | Description | One offset | Two offsets | CLD | DT | NIRSpec only |
|---|---|---|---|---|---|---|---|
| log(XH2O) | 𝒰(-12, -0.3) | Mixing ratio of H2O |
 |
 |
 |
 |
 |
| log(XCH4) | 𝒰(-12, -0.3) | Mixing ratio of CH4 |
 |
 |
 |
 |
 |
| log(XNH3) | 𝒰(-12, -0.3) | Mixing ratio of NH3 |
 |
 |
 |
 |
 |
| log(XCO) | 𝒰(-12, -0.3) | Mixing ratio of CO |
 |
 |
 |
 |
 |
| log(XCO2) | 𝒰(-12, -0.3) | Mixing ratio of CO2 |
 |
 |
 |
 |
 |
| log(XHCN) | 𝒰(-12, -0.3) | Mixing ratio of HCN |
 |
 |
 |
 |
 |
| log(XC2H2) | 𝒰(-12, -0.3) | Mixing ratio of C2H2 |
 |
 |
 |
 |
 |
| log(XC2H6) | 𝒰(-12, -0.3) | Mixing ratio of C2H6 |
 |
 |
 |
 |
 |
| log(XH2S) | 𝒰(-12, -0.3) | Mixing ratio of H2S |
 |
 |
 |
 |
 |
| log(XSO2) | 𝒰(-12, -0.3) | Mixing ratio of SO2 |
 |
 |
 |
 |
 |
| log(XDMS) | 𝒰(-12, -0.3) | Mixing ratio of DMS |
 |
 |
 |
 |
 |
| log(XCS2) | 𝒰(-12, -0.3) | Mixing ratio of CS2 |
 |
 |
 |
 |
 |
| log(XCH3Cl) | 𝒰(-12, -0.3) | Mixing ratio of CH3Cl |
 |
 |
 |
 |
 |
| log(XOCS) | 𝒰(-12, -0.3) | Mixing ratio of OCS |
 |
 |
 |
 |
 |
| log(XN2O) | 𝒰(-12, -0.3) | Mixing ratio of N2O |
 |
 |
 |
 |
 |
| T0/K | 𝒰(0, 500) | Temperature at 1 μbar |
 |
 |
 |
 |
 |
| T10mbar/K | - | Temperature at 10 mbar |
 |
 |
 |
 |
 |
 |
𝒰(0.02, 2.00) | P-T profile curvature |
 |
 |
 |
 |
 |
 |
𝒰(0.02, 2.00) | P-T profile curvature |
 |
 |
 |
 |
 |
| log(P1/bar) | 𝒰(-6, 1) | P-T profile region limit |
 |
 |
 |
 |
 |
| log(P2/bar) | 𝒰(-6, 1) | P-T profile region limit |
 |
 |
 |
 |
 |
| log(P3/bar) | 𝒰(-2, 1) | P-T profile region limit |
 |
 |
 |
 |
 |
| log(Pref/bar) | 𝒰(-6, 1) | Reference pressure at RP |
 |
 |
 |
 |
 |
| log(a) | 𝒰(-4, 10) | Rayleigh enhancement factor |
 |
 |
 |
 |
 |
| γ | 𝒰(-20, 2) | Scattering slope |
 |
 |
 |
 |
 |
| log(Pc/bar) | 𝒰(-6, 1) | Cloud top pressure |
 |
 |
 |
 |
 |
| ϕ | 𝒰(0, 1) | Cloud/haze coverage fraction |
 |
 |
 |
 |
 |
| δNIRSpec/ppm | 𝒰(-200, 200) | NIRSpec dataset offset |
 |
- |
 |
 |
- |
| δNRS1/ppm | 𝒰(-200, 200) | NIRSpec NRS1 dataset offset | - |
 |
- | - | - |
| δNRS2/ppm | 𝒰(-200, 200) | NIRSpec NRS2 dataset offset | - |
 |
- | - | - |
Note. The five retrieval cases are described in Section 3. All parameter values correspond to the retrieved median and 1σ estimates. The temperature at 10 mbar, which corresponds to the observed photosphere, is derived from the retrieved P − T profile. Additional parameters for stellar heterogeneities are described in Appendix I.
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