The power spectrum extended technique applied to images of binary stars in the infrared

no code implementations • 17 Dec 2020 • Eric Aristidi, Eric Cottalorda, Marcel Carbillet, Lyu Abe, Karim Makki, Jean-Pierre Rivet, David Vernet, Philippe Bendjoya

We recently proposed a new lucky imaging technique, the Power Spectrum Extended (PSE), adapted for image reconstruction of short-exposure astronomical images in case of weak turbulence or partial adaptive optics correction.

Image Reconstruction Instrumentation and Methods for Astrophysics

Estimating low-order aberrations through a Lyot coronagraph with a Zernike wavefront sensor for exoplanet imaging

no code implementations • 15 Dec 2020 • Raphaël Pourcelot, Mamadou N'Diaye, Greg Brady, Marcel Carbillet, Kjetil Dohlen, Julia Fowler, Iva Laginja, Matthew Maclay, James Noss, Marshall Perrin, Pete Petrone, Emiel Por, Jean-François Sauvage, Rémi Soummer, Arthur Vigan, Scott Will

To calibrate these pointing errors and other critical low-order aberrations, we propose a wavefront sensing path based on Zernike phase-contrast methods to analyze the starlight that is filtered out by the coronagraph at the telescope focus.

Instrumentation and Methods for Astrophysics

DO-CRIME: Dynamic On-sky Covariance Random Interaction Matrix Evaluation, a novel method for calibrating adaptive optics systems

no code implementations • 30 Nov 2020 • Olivier Lai, Mark Chun, Ryan Dungee, Jessica Lu, Marcel Carbillet

This calibration usually takes the form of an interaction matrix and is a measure of the response on the wavefront sensor to wavefront corrector stimulus.

Instrumentation and Methods for Astrophysics