Author

Briley L. Lewis

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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

Enabling quantitative polarimetry for Keck/NIRC2: preliminary Mueller matrix model calibration

The Keck/NIRC2 infrared imager was upgraded in 2025 with dual-beam polarimetric observing modes spanning approximately 1.1--4.1 microns (JHKL'bands). We present a preliminary JHK calibration of NIRC2 Polarimetry using a wavelength-dependent Mueller matrix model of the Keck tertiary mirror (M3), half-wave plate (HWP), i...

Man-Xuan Zhang, Briley L. Lewis, Maxwell A. Millar-Blanchaer et al. · Ground-based and Airborne In... · 1 citation

Open access Jul 2026

Updating the SCExAO/CHARIS polarimetric calibration following the Nasmyth beam-switcher upgrade

Subaru/SCExAO/CHARIS enables near-infrared integral field spectropolarimetry. Quantitative polarimetry is useful for a variety of science cases, particularly measurements related to dust grain properties in circumstellar disks. This capability requires correcting for polarization effects from the optical path via a Mue...

Thomas McIntosh, Man-Xuan Zhang, Briley L. Lewis et al. · Astronomical Telescopes + In... · 2 citations