The spectral redistribution function of eROSITA PNCCDs

The eROSITA instrument on the satellite Spektrum-Roentgen-Gamma will perform an all-sky survey as well as pointed observations in the low and medium X-ray energy regime. The 7 PNCCD detectors for this instrument are developed and manufactured at the MPI Semiconductor Laboratory. We summarize the characterization of this type of PNCCD regarding the spectral redistribution function in the photon energy range from 100 eV to 11 keV. We present the results of Geant4 simulations compared to our measurements. We explain the observed spectral features and their origin inside the detector.