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Table 2

MIRI imager PSF metrics.

Data (EE normalized to 5 arcsec) WebbPSF (EE normalized to 5 arcsec) Data / WebbPSF



Filter FWHM EE within 1st FWHM EE within 1st FWHM EE
(arcsec) dark Airy ring (arcsec) dark Airy ring ratios ratios
F560W 0.207 55–63% 0.182 60.9% 1.14 0.9–1.03
F770W 0.269 62% 0.260 65.3% 1.03 0.95
F1000W 0.328 71% 0.321 70.9% 1.02 1
F1130W 0.375 73% 0.368 72.7% 1.02 1
F1280W 0.420 65% 0.412 72.8% 1.02 0.89
F1500W 0.488 77% 0.483 73.5% 1.01 1.05
F1800W 0.591 74% 0.580 74.4% 1.02 0.99
F2100W 0.674 72% 0.665 75.1% 1.01 0.96
F2550W 0.803 68% 0.812 76.1% 0.98 0.89

Notes. MIRI imager PSF metrics, measured on commissioning data (2nd and 3rd columns), and WebbPSF models (4th and 5th columns). The last two columns tabulate FWHM and EEs (Encircled energies) ratios between data and models. FWHM are average values in x and y directions from fitting a bi-dimensional Airy function to the images.

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