Author

K. V. Van Gorkom

3 papers indexed here

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Review Aug 2026

Visible-Light High-Contrast Polarimetry with MagAO-X: Characterization and Initial Results

MagAO-X is a visible-light extreme adaptive optics instrument on the 6.5 meter Magellan Clay Telescope, recently upgraded to enable high-contrast polarimetric differential imaging (PDI) in r', i', and z'filters. Polarimetry is a powerful technique for suppressing unpolarized starlight and isolating the faint, polarized...

M. Lucas, L. Close, J. Males et al. · 0 citations

Open access Aug 2026

Closed-loop atmospheric dispersion correction for high-contrast imaging with MagAO-X

Incoming starlight is refracted as it enters Earth’s atmosphere from the vacuum of space. The wavelength dependence of atmospheric refraction causes elongation of the broadband PSF of ground-based telescopes, especially in the visible spectrum. The result is degraded image quality alongside reduced coronagraph light-bl...

K. Twitchell, S. Haffert, J. Males et al. · Astronomical Telescopes + In... · 4 citations

Open access Aug 2026

No need to modulate: on-sky results of a neural network enhanced pyramid wavefront sensor and prospects for the ELTs

One of the main limitations of ground-based extreme adaptive optics systems (XAO) is the balance between the temporal and photon noise error. The unmodulated Pyramid Wavefront Sensor (uPWFS) promises significant gains in sensitivity over its modulated counterpart, but its practical use is limited by its linearity range...

R. Landman, Liam Koning, S. Haffert et al. · Astronomical Telescopes + In... · 1 citation