52 citations · 275 across the 60 of their papers we have counts for
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Spectral characterization of a 3-port photonic lantern for application to spectroastrometry
Yoo Jung Kim, Michael P. Fitzgerald, Jonathan Lin +10
Spectroastrometry, which measures wavelength-dependent shifts in the center of light, is well-suited for studying objects whose morphology changes with wavelength at very high angu…
RISTRETTO: the PIAA Nuller in the prototyping phase
N. Restori, N. Blind, J. Kühn +6
The objective of the coronagraphic IFU of RISTRETTO is to enable High Dispersion Coronagraphy of planets at a distance of 2/D from their star, without compromising on transmissi…
Visible-Light High-Contrast Imaging and Polarimetry with SCExAO/VAMPIRES
Miles Lucas, Barnaby Norris, Olivier Guyon +17
We present significant upgrades to the VAMPIRES instrument, a visible-light (600 nm to 800 nm) high-contrast imaging polarimeter integrated within SCExAO on the Subaru telescope. K…
SCExAO/CHARIS Near-Infrared Scattered-Light Imaging and Integral Field Spectropolarimetry of the AB Aurigae Protoplanetary System
Erica Dykes, Thayne Currie, Kellen Lawson +21
We analyze near-infrared integral field spectropolarimetry of the AB Aurigae protoplanetary disk and protoplanet (AB Aur b), obtained with SCExAO/CHARIS in 22 wavelength channels c…
Tuning the MAPS Adaptive Secondary Mirror: Actuator Control, PID Tuning, Power Spectra and Failure Diagnosis
Jess A. Johnson, Amali Vaz, Manny Montoya +17
The MMT Adaptive optics exoPlanet characterization System (MAPS) is currently in its engineering phase, operating on-sky at the MMT Telescope on Mt. Hopkins in southern Arizona. Th…
Real-time control and data standardization on various telescopes and benches
Nour Skaf, Rebecca Jensen-Clem, Aaron Hunter +19
Real-time control (RTC) is pivotal for any Adaptive Optics (AO) system, including high-contrast imaging of exoplanets and circumstellar environments. It is the brain of the AO syst…
RISTRETTO: a VLT XAO design to reach Proxima Cen b in the visible
N. Blind, M. Shinde, I. Dinis +10
RISTRETTO is the evolution of the original idea of coupling the VLT instruments SPHERE and ESPRESSO \cite{lovis_2016a}, aiming at High Dispersion Coronagraphy. RISTRETTO is a visit…
Design, scientific goals, and performance of the SCExAO survey for planets around accelerating stars
Mona El Morsy, Thayne Currie, Masayuki Kuzuhara +25
We describe the motivation, design, and early results for our 42-night, 125 star Subaru/SCExAO direct imaging survey for planets around accelerating stars. Unlike prior large surve…
Spectral interferometric wavefront sensing: a solution for petalometry at Subaru/SCExAO
Vincent Deo, Sebastien Vievard, Manon Lallement +12
The petaling effect, induced by pupil fragmentation from the telescope spider, drastically affects the performance of high contrast instruments by inducing core splitting on the PS…
RISTRETTO: reflected-light exoplanet spectroscopy at the diffraction limit of the VLT
Christophe Lovis, Nicolas Blind, Bruno Chazelas +28
RISTRETTO is a visible high-resolution spectrograph fed by an extreme adaptive optics (AO) system, to be proposed as a visitor instrument on ESO VLT. The main science goal of RISTR…
Spectroscopy using a visible photonic lantern at the Subaru telescope: Laboratory characterization and first on-sky demonstration on Ikiiki (α Leo) and `Aua (α Ori)
Sébastien Vievard, Manon Lallement, Sergio Leon-Saval +23
Photonic lanterns are waveguide devices enabling high throughput single mode spectroscopy and high angular resolution. We aim to present the first on-sky demonstration of a photoni…
AO3k at Subaru: First on-sky results of the facility extreme-AO
Julien Lozi, Kyohoon Ahn, Hannah Blue +12
The facility adaptive optics of the Subaru Telescope AO188 recently received some long-awaited upgrades: a new 3224-actuator deformable mirror (DM) from ALPAO (hence the name chang…
The GLINT nulling interferometer: improving nulls for high-contrast imaging
Eckhart Spalding, Elizabeth Arcadi, Glen Douglass +13
GLINT is a nulling interferometer downstream of the SCExAO extreme-adaptive-optics system at the Subaru Telescope (Hawaii, USA), and is a pathfinder instrument for high-contrast im…
Exo-NINJA at Subaru: fiber-fed spectro-imaging of exoplanets and circumstellar disks at R4000
Mona El Morsy, Julien Lozi, Olivier Guyon +9
Exo-NINJA will realize nearIR R4000 diffraction-limited narrow-field spectro-imaging for characterization of exoplanets and circumstellar disk structures. It uniquely combine…
Visible Photonic Lantern integration, characterization and on-sky testing on Subaru/SCExAO
Sébastien Vievard, Manon Lallement, Sergio Leon-Saval +23
A Photonic Lantern (PL) is a novel device that efficiently converts a multi-mode fiber into several single-mode fibers. When coupled with an extreme adaptive optics (ExAO) system a…
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…
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…
Searching for Protoplanets around MWC 758 and MWC 480 in Br- using Kernel Phase and SCExAO/CHARIS
Alexander Chaushev, Steph Sallum, Julien Lozi +6
Discovering new actively-accreting protoplanets is crucial to answering open questions about planet formation. However, identifying such planets at orbital distances where they are…
Dynamical and Atmospheric Characterization of the Substellar Companion HD 33632 Ab from Direct Imaging, Astrometry, and Radial-Velocity Data
Mona El Morsy, Thayne Currie, Danielle Bovie +17
We present follow-up SCExAO/CHARIS and -band (R 70) high-contrast integral field spectroscopy and Keck/NIRC2 photometry of directly-imaged brown dwarf companion HD 33…