CRISP is a python package that describes the stochastic interactions of UHECR nuclei with analytical probability distributions. The package is applicable for extra-galactic propagation and in-source propagation, allowing for different interactions in accordance to the scenario. It is especially suited for the analysis of the probability distributions for individual events, such as the reconstruction of the past history for observed cosmic rays. However, the application to describing the propagation of a flux of cosmic rays within the source and through extra-galactic space is also possible.
Link: to be released soon