475 citations · 1.2k across the 111 of their papers we have counts for
17 papers · 1 filter
Reconstruction methods for the phase-shifted Zernike wavefront sensor
Vincent Chambouleyron, Mahawa Cissé, Maïssa Salama +8
The Zernike wavefront sensor (ZWFS) stands out as one of the most sensitive optical systems for measuring the phase of an incoming wavefront, reaching photon efficiencies close to…
Challenge of direct imaging of exoplanets within structures: disentangling real signal from point source from background light
Jialin Li, Laird M. Close, Jared R. Males +19
The high contrast and spatial resolution requirements for directly imaging exoplanets requires effective coordination of wavefront control, coronagraphy, observation techniques, an…
Analyzing Misalignment Tolerances for Implicit Electric Field Conjugation
Joshua Liberman, Sebastiaan Y. Haffert, Jared R. Males +1
High contrast imaging of extrasolar planets and circumstellar disks requires extreme wavefront stability. Such stability can be achieved with active wavefront control (WFC). The ne…
On-sky, real-time optical gain calibration on MagAO-X using incoherent speckles
Eden A. McEwen, Jared R. Males, Olivier Guyon +15
The next generation of extreme adaptive optics (AO) must be calibrated exceptionally well to achieve the desired contrast for ground-based direct imaging exoplanet targets. Current…
High-contrast imaging at first-light of the GMT: the wavefront sensing and control architecture of GMagAO-X
Sebastiaan Y. Haffert, Jared R Males, Laird M. Close +3
The Giant Magellan Adaptive Optics eXtreme (GMagAO-X) instrument is a first-light high-contrast imaging instrument for the Giant Magellan Telescope (GMT). GMagAO-X's broad waveleng…
MagAO-X Phase II Upgrades: Implementation and First On-Sky Results of a New Post-AO 1000 Actuator Deformable Mirror
Jay K. Kueny, Kyle Van Gorkom, Maggie Kautz +13
MagAO-X is the extreme coronagraphic adaptive optics (AO) instrument for the 6.5-meter Magellan Clay telescope and is currently undergoing a comprehensive batch of upgrades. One in…
High-Contrast Imaging at First-Light of the GMT: The Preliminary Design of GMagAO-X
Jared R. Males, Laird M. Close, Sebastiaan Y. Haffert +15
We present the preliminary design of GMagAO-X, the first-light high-contrast imager planned for the Giant Magellan Telescope. GMagAO-X will realize the revolutionary increase in sp…
More data than you want, less data than you need: machine learning approaches to starlight subtraction with MagAO-X
Joseph D. Long, Jared R. Males, Laird M. Close +17
High-contrast imaging data analysis depends on removing residual starlight from the host star to reveal planets and disks. Most observers do this with principal components analysis…
MagAO-X: Commissioning Results and Status of Ongoing Upgrades
Jared R. Males, Laird M. Close, Sebastiaan Y. Haffert +20
MagAO-X is the coronagraphic extreme adaptive optics system for the 6.5 m Magellan Clay Telescope. We report the results of commissioning the first phase of MagAO-X. Components now…
The Space Coronagraph Optical Bench (SCoOB): 5. End-to-end simulations of polarization aberrations
Ramya M Anche, Kyle J. Van Gorkom, Jaren N. Ashcraft +4
Polarization aberrations originating from the telescope and high-contrast imaging instrument optics introduce polarization-dependent speckles and associated errors in the image pla…
The space coronagraph optical bench (SCoOB): 4. vacuum performance of a high contrast imaging testbed
Kyle Van Gorkom, Ewan S Douglas, Kian Milani +8
The Space Coronagraph Optical Bench (SCoOB) is a high-contrast imaging testbed built to demonstrate starlight suppression techniques at visible wavelengths in a space-like vacuum e…
Implicit Electric Field Conjugation Through a Single-mode Fiber
Joshua Liberman, Jorge Llop-Sayson, Arielle Bertrou-Cantou +4
Connecting a coronagraph instrument to a spectrograph via a single-mode optical fiber is a promising technique for characterizing the atmospheres of exoplanets with ground and spac…
Modeling and performance analysis of Implicit Electric Field Conjugation with two deformable mirrors applied to the Roman Coronagraph
Kian Milani, Ewan S. Douglas, Sebastiaan Y. Haffert +1
High-order wavefront sensing and control (HOWFSC) is key to create a dark hole region within the coronagraphic image plane where high contrasts are achieved. The Roman Coronagraph…
Bioverse: GMT and ELT Direct Imaging and High-Resolution Spectroscopy Assessment $\unicode{x2013}$ Surveying Exo-Earth O and Testing the Habitable Zone Oxygen Hypothesis
Kevin K. Hardegree-Ullman, Dániel Apai, Sebastiaan Y. Haffert +4
Biosignature detection in the atmospheres of Earth-like exoplanets is one of the most significant and ambitious goals for astronomy, astrobiology, and humanity. Molecular oxygen is…
Quantum Limits of Exoplanet Detection and Localization
Nico Deshler, Sebastiaan Haffert, Amit Ashok
Discovering exoplanets in orbit around distant stars via direct imaging is fundamentally impeded by the combined effect of optical diffraction and photon shot noise under extreme s…
Making the unmodulated Pyramid wavefront sensor smart. Closed-loop demonstration of neural network wavefront reconstruction with MagAO-X
Rico Landman, Sebastiaan Haffert, Jared Males +12
Almost all current and future high-contrast imaging instruments will use a Pyramid wavefront sensor (PWFS) as a primary or secondary wavefront sensor. The main issue with the PWFS…
Into nonlinearity and beyond for Zernike-like wavefront sensors
Sebastiaan Y. Haffert
Context: Telescopes like the Extremely Large Telescope (ELT) and the Giant Magellan Telescope (GMT) will be used together with extreme adaptive optics (AO) instruments to directly…