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- W3188295491 abstract "High quality, repeatable point-spread functions are important for science cases like direct exoplanet imaging, high-precision astrometry, and high-resolution spectroscopy of exoplanets. For such demanding applications, the initial on-sky point-spread function delivered by the adaptive optics system can require further optimization to correct unsensed static aberrations and calibration biases. We investigated using the Fast and Furious focal-plane wavefront sensing algorithm as a potential solution. This algorithm uses a simple model of the optical system and focal plane information to measure and correct the point-spread function phase, without using defocused images, meaning it can run concurrently with science. On-sky testing demonstrated significantly improved PSF quality in only a few iterations, with both narrow and broadband filters. These results suggest this algorithm is a useful path forward for creating and maintaining high-quality, repeatable on-sky adaptive optics point-spread functions." @default.
- W3188295491 created "2021-08-16" @default.
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- W3188295491 date "2021-09-01" @default.
- W3188295491 modified "2023-10-14" @default.
- W3188295491 title "Fast and furious focal-plane wavefront sensing at W.M. Keck Observatory" @default.
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- W3188295491 doi "https://doi.org/10.1117/12.2596147" @default.
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