PSF radial profiles at 5.6 and 25.5 µm: comparison between in-flight PSFs and simulated WebbPSFs. The left panels show radial profiles, normalised to the flux of the central pixel. The blue, green and orange curves show respectively: the flight data (see Fig. 3 for images), the WebbPSFs without the cruciform artefact, and the WebbPSFs with the cruciform artefact (see text for details). For the F560W filter, the profile at large radii (outside the secondary Airy ring at r > 6 pixels) is dominated by the cruciform. At 25.5 µm, there is no cruciform. The right panels show encircled energy (cumulative radial flux) profiles, normalised at a radius of 5 arcsecs (≈ 45 MIRIM pixels). The red dashed lines highlight the position of the radius containing 65% of the total encircled energy within 5 arcsecs.