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Table 4.
FWHM of the Euclid VIS/NISP, JWST NIRCam, and IRAC PSFs.
| Filter | FWHM | ||
|---|---|---|---|
| [arcsec] | [kpc] at z = 1 | [kpc] at z = 6 | |
| Euclid/IE | 0.16 | 1.3 | 0.9 |
| Euclid/HE | 0.3 | 2.5 | 1.8 |
| JWST/F070W | 0.029 | 0.2 | 0.17 |
| JWST/F150W | 0.050 | 0.4 | 0.29 |
| JWST/F356W | 0.116 | 0.96 | 0.67 |
| JWST/F444W | 0.145 | 1.19 | 0.85 |
| IRAC/IRAC1 | 1.66–1.95a | 13.7–16.1 | 9.7–11.4 |
| IRAC/IRAC2 | 1.72–2.02a | 14.2–16.6 | 10.0–11.8 |
Notes. Citations: Euclid/IE (Euclid Collaboration: McCracken et al. 2026), Euclid/HE (Euclid Collaboration: Polenta et al. 2026). JWST (Rigby et al. 2023). a The two numbers refer to when Spitzer was cryogenically cooled and when it was warm, respectively.
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