Pyrat Bay

Pyrat Bay: Python Radiative Transfer in a Bayesian framework. Pyrat Bay is an efficient, user-friendly tool to compute and fit radiative-transfer spectra. This package offers: Forward-model radiative-transfer calculation of: Transmission spectra (transit observations); Emission spectra (eclipse observations); Line-by-line calculation; Opacity sources: Line-by-line molecular absorption; Collision-induced absorption; Rayleigh scattering absorption; Na and K alkali resonant lines; Gray and Mie scattering opacity. Bayesian (MCMC) posterior sampling of atmospheric parameters: Molecular abundances; Temperature profile; Pressure-radius; Rayleigh and cloud top levels

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