Fig. 1
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Defocused PSF of X-IFU at 13 energies. Bottom right panel: in-focus PSF at 1 keV (HEW = 5″) for comparison. The grid in this panel shows the X-IFU pixels. The in-focus PSF is shown on a 20″ × 20″ image, while the defocused PSF is shown on a 200″ × 200″ image. The full field of view of the X-IFU is of the order of 300″ (in diameter), as shown in Fig. 2. All the PSFs are shown in linear scale.
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