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EXOTIC, the official data reduction pipeline of Exoplanet Watch, is a free Python3 package for reducing observations (raw FITS images) of transiting exoplanets into lightcurves. It can calibrate your data (i.e., with flats, darks, and biases) and then choose the ideal combination of comparision star, aperture, and sky annulus to extract a transit lightcurve. It then fits your observed transit with a model lightcurve to calculate the transit depth (which measures the size of the planet relative to its host star) and mid-transit time (which helps us more accurately calculate future transits).
EXOTIC can run on a Windows, Macintosh, or Linux/Unix computer. You can also use EXOTIC via the free Google Colab, which features cloud computing, many helpful plotting functions, and a simplified installation. However, if you are a user with many images or large images, we recommend running EXOTIC locally on your own computer.