Pyxel is a novel, open-source and Python-based framework designed to host and pipeline any type of models simulating detector effects such as cosmic rays, detector PSF, various noise sources, Charge Transfer Inefficiency or persistence on images produced by CCD or CMOS-based imaging detectors. It is currently under development at the European Space Agency with the goal of release it to the broader detector scientist community. We present here the architecture of the framework, how to integrate new models in it and give a few examples of its current simulation capabilities.
ESA’s astrometry mission Gaia was launched in 2013 to establish the most accurate and complete map of the Milky Way by measuring the distance, position, proper motion, and astrophysical characteristics of two billion stars. It contains the largest focal plane ever flown in space comprising 106 CCDs. To downlink to Earth only useful data, an on-board algorithm was designed to discriminate between e.g. stars and cosmics- ionizing tracks left by energetic particles. A cosmic ray event generation simulator was developed to train and optimize this on-board source detection algorithm. We can now validate this model against Gaia data.