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A Python Package for Multidimensional Atmospheric Retrievals of Exoplanet Spectra

POSEIDON is a spectral modelling and atmospheric retrieval code for exoplanets. Given a set of observed exoplanet spectra from space-based or ground-based telescopes, POSEIDON uses Bayesian techniques to infer the atmospheric properties of the planet.

POSEIDON currently supports the modelling and retrieval of 1D, 2D, and 3D transmission spectra. Basic functionality for thermal emission spectra is also present and will be expanded in future releases.

The installation guide and a wide-range of tutorials for different applications can be found in the POSEIDON documentation.

If you use POSEIDON in your work, please cite MacDonald & Madhusudhan (2017) and MacDonald (2023).

Copyright 2023 Ryan J. MacDonald

POSEIDON is available under the BSD 3-Clause License. Please see the LICENSE file for more information.

For bug reports or feature requests, please raise an issue.

Interesting in contributing to POSEIDON? Please see the contribution guide.

Feel free to reach out to [email protected]