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Focal plane wavefront sensing and control strategies for high-contrast imaging on the MagAO-X instrument

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arxiv 1807.04381 v1 pith:O65MEBIV submitted 2018-07-12 astro-ph.IM

Focal plane wavefront sensing and control strategies for high-contrast imaging on the MagAO-X instrument

Kelsey Miller , Jared R. Males , Olivier Guyon , Laird M. Close , David Doelman , Frans Snik , Emiel Por , Michael J. Wilby
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Chris Bohlman Jennifer Lumbres Kyle Van Gorkom Maggie Kautz Alexander Rodack Justin Knight Nemanja Jovanovic Katie Morzinski Lauren Schatz
This is my paper
classification astro-ph.IM
keywords wavefrontcoronagraphvappwillcontrolextremefocalplane
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The Magellan extreme adaptive optics (MagAO-X) instrument is a new extreme adaptive optics (ExAO) system designed for operation in the visible to near-IR which will deliver high contrast-imaging capabilities. The main AO system will be driven by a pyramid wavefront sensor (PyWFS); however, to mitigate the impact of quasi-static and non-common path (NCP) aberrations, focal plane wavefront sensing (FPWFS) in the form of low-order wavefront sensing (LOWFS) and spatial linear dark field control (LDFC) will be employed behind a vector apodizing phase plate (vAPP) coronagraph using rejected starlight at an intermediate focal plane. These techniques will allow for continuous high-contrast imaging performance at the raw contrast level delivered by the vAPP coronagraph 6 x 10^-5. We present simulation results for LOWFS and spatial LDFC with a vAPP coronagraph, as well as laboratory results for both algorithms implemented with a vAPP coronagraph at the University of Arizona Extreme Wavefront Control Lab.

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  1. Chasing the storm: Investigating the application of high-contrast imaging techniques in producing precise exoplanet light curves

    astro-ph.EP 2025-11 conditional novelty 6.0

    Artificial companions injected into LBT/ALES vAPP data are detectable, but their variability amplitudes, periods and phases are not accurately recovered when only ~2.4 periods are observed.