Preprint
Oct 2026
Model-Based Retrieval of Four Years of JWST/NIRCam Wavefronts
The fidelity of data recovered by the James Webb Space Telescope (JWST) depends on precise monitoring of the mirror segments'surfaces and alignment. To this end, every few days the observatory takes pairs of defocused images of a reference star with its NIRCam instrument; a closed-source phase retrieval package is then...
S. Ray, Benjamin J. S. Pope, L. Desdoigts et al.
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