Modelled encircled energy (EE) of the Euclid NISP PSF in the three photometry channels from data observed in the self-calibration field during the PV phase and based on simplified PSF models. Shown is the cumulative EE of point sources as a function of radius from the objects’ centre. The three colours are curves for the YE-band (green), J_E-band (orange), and H_E-band (blue). For each passband there is one line for each of the 16 detectors in the FPA, in each case describing the mean detector EE curve – which is very similar for all detectors – and an overall average. Vertical lines mark the radius encircling 50% (rEE50) and 80% (rEE80) of the total flux.