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Welcome to catwoman’s documentation!

When exoplanets pass in front of their stars, they imprint a transit signature on the stellar light curve which to date has been assumed to be symmetric in time, owing to the planet being modelled as a circular area occulting the stellar surface. However, this signature might be asymmetric due to different temperature/pressure and/or chemical compositions in the different terminator regions of the transiting planet.

catwoman is a Python package that allows to model these asymmetric transit lightcurves, calculating light curves for any radially symmetric stellar limb darkening law, and where planets are modelled as two semi-circles, of different radii, using the integration algorithm developed in Kreidberg (2015) and implemented in the batman library, from which catwoman builds upon.

Please cite Jones & Espinoza 2020 and Espinoza & Jones 2021 if you use catwoman in your research.

If you find a bug or have any problems with catwoman, please opening an issue on the project’s GitHub and we will try to get back to you as soon as possible.

Indices and tables