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View article: PAPYRUS: from an adaptive optics system to an instrumental platform
PAPYRUS: from an adaptive optics system to an instrumental platform Open
International audience
View article: PROVIDENCE: toward a 2.5m adaptive telescope for optical space domain awareness (but not only…)
PROVIDENCE: toward a 2.5m adaptive telescope for optical space domain awareness (but not only…) Open
International audience
View article: Using a pyramid wavefront sensor off-zero: from theory to practice
Using a pyramid wavefront sensor off-zero: from theory to practice Open
International audience
View article: Advancements in estimating differential pistons for the Extremely Large Telescope using deep learning
Advancements in estimating differential pistons for the Extremely Large Telescope using deep learning Open
International audience
View article: Marginalized myopic deconvolution of adaptive optics corrected images using Markov chain Monte Carlo methods
Marginalized myopic deconvolution of adaptive optics corrected images using Markov chain Monte Carlo methods Open
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View article: Improved prior for adaptive optics point spread function estimation from science images: Application for deconvolution
Improved prior for adaptive optics point spread function estimation from science images: Application for deconvolution Open
Context . Access to knowledge of the point spread function (PSF) of adaptive optics(AO)-assisted observations is still a major limitation when processing AO data. This limitation is particularly important when image analysis requires the u…
View article: Improved prior for adaptive optics point spread function estimation from science images: Application for deconvolution
Improved prior for adaptive optics point spread function estimation from science images: Application for deconvolution Open
Access to knowledge of the point spread function (PSF) of adaptive optics(AO)-assisted observations is still a major limitation when processing AO data. This limitation is particularly important when image analysis requires the use of deco…
View article: PAPYRUS: one year of on-sky operations
PAPYRUS: one year of on-sky operations Open
The PAPYRUS adaptive optics (AO) bench has been developed to test and maturate new concepts of wavefront sensors (WFS), control strategies and dedicated hardware such as cameras and deformable mirrors. The bench will serve as a pathfinder …
View article: Toward the full control of NCPA with the pyramid wavefront sensor: mastering the optical gains
Toward the full control of NCPA with the pyramid wavefront sensor: mastering the optical gains Open
The pyramid wavefront sensor is an asset for an AO system thanks to its sensitivity. However, because its a nonlinear sensor it comes with operational challenges. A convolutional method and a gain sensing camera allow to track the optical …
View article: Marginalized semi-blind restoration of Adaptive-Optics-corrected images using stochastic sampling
Marginalized semi-blind restoration of Adaptive-Optics-corrected images using stochastic sampling Open
Adaptive optics (AO) corrected image restoration is particularly difficult, as it suffers from the lack of knowledge on the point spread function (PSF) in addition to usual difficulties. An efficient approach is to marginalize the object o…
View article: PAPYRUS: Design and integration of the Shack-Hartmann branch
PAPYRUS: Design and integration of the Shack-Hartmann branch Open
The PAPYRUS project is an adaptive optics bench installed on a 1.5 meter telescope at the Haute-Provence Observatory in south of France. Since the first light of the instrument in June 2022, it has now undergone one year of on-sky experime…
View article: Including the pyramid optical gains into analytical models
Including the pyramid optical gains into analytical models Open
Fourier-filtering wavefront sensors (WFS), such as the pyramid of Zernike WFS, are shown to be highly sensitive. They are becoming the baseline for future adaptive optics (AO) systems for astronomy. The next generation Extremely Large Tele…
View article: PAPYRUS: Second stage adaptive optics with a vector Zernike wavefront sensor
PAPYRUS: Second stage adaptive optics with a vector Zernike wavefront sensor Open
The Provence Adaptive optics PYramid Run System (PAPYRUS) is a pyramid-based Adaptive Optics (AO) system installed at the Coude focus of the 1.52m telescope (T152) at the Observatoire de Haute Provence (OHP). PAPYRUS is a young researcher …
View article: The equilibrium shape of (65) Cybele: primordial or relic of a large impact?
The equilibrium shape of (65) Cybele: primordial or relic of a large impact? Open
Context. Cybele asteroids constitute an appealing reservoir of primitive material genetically linked to the outer Solar System, and the physical properties (size and shape) of the largest members can be readily accessed by large (8m class)…
View article: Constraining the shape and density of binary asteroid (121) Hermione
Constraining the shape and density of binary asteroid (121) Hermione Open
<p align="justify"><strong>Context</strong></p> <p align="justify">(121) Hermione is a large binary asteroid [1] located at the outer edge of the asteroid belt in the Cybele region, where a…
View article: Performance characterization and near-real-time monitoring of MUSE adaptive optics modes at Paranal
Performance characterization and near-real-time monitoring of MUSE adaptive optics modes at Paranal Open
The Multi Unit Spectroscopic Explorer (MUSE) is an integral field spectrograph on the Very Large Telescope Unit Telescope 4, capable of laser guide star assisted and tomographic adaptive optics using the GALACSI module. Its observing capab…
View article: Towards robust deconvolution of hyperspectral data cubes
Towards robust deconvolution of hyperspectral data cubes Open
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View article: VLT/SPHERE imaging survey of D>100 km asteroids: Final results and synthesis
VLT/SPHERE imaging survey of D>100 km asteroids: Final results and synthesis Open
<p><strong>Abstract</strong></p> <p>Until recently, only three large main belt asteroids, Ceres, Vesta and Lutetia, had been imaged with a high level of detail, as they were visited by the space missions Dawn …
View article: M-type (22) Kalliope: A tiny Mercury
M-type (22) Kalliope: A tiny Mercury Open
Context. Asteroid (22) Kalliope is the second largest M-type asteroid in the main belt and is orbited by a satellite, Linus. Whereas the mass of Kalliope is already well constrained thanks to the presence of a moon, its volume is still poo…
View article: The ESO’s Extremely Large Telescope Working Groups
The ESO’s Extremely Large Telescope Working Groups Open
Since 2005 ESO has been working with its community and industry to develop an extremely large optical/infrared telescope. ESO’s Extremely Large Telescope, or ELT for short, is a revolutionary ground-based telescope that will have a 39-metr…
View article: VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis
VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis Open
Context. Until recently, the 3D shape, and therefore density (when combining the volume estimate with available mass estimates), and surface topography of the vast majority of the largest ( D ≥ 100 km) main-belt asteroids have remained poo…
View article: Current status of PAPYRUS : the pyramid based adaptive optics system at LAM/OHP
Current status of PAPYRUS : the pyramid based adaptive optics system at LAM/OHP Open
The Provence Adaptive optics Pyramid Run System (PAPYRUS) is a pyramid-based Adaptive Optics (AO) system that will be installed at the Coude focus of the 1.52m telescope (T152) at the Observatoire de Haute Provence (OHP). The project is be…
View article: Central kinematics of the Galactic globular cluster M80
Central kinematics of the Galactic globular cluster M80 Open
We use spectra observed with the integral-field spectrograph Multi Unit Spectroscopic Explorer (MUSE) to reveal the central kinematics of the Galactic globular cluster Messier 80 (M80, NGC 6093). Using observations obtained with the recent…
View article: An advanced multipole model for (216) Kleopatra triple system
An advanced multipole model for (216) Kleopatra triple system Open
Aims. To interpret adaptive-optics observations of (216) Kleopatra, we need to describe an evolution of multiple moons orbiting an extremely irregular body and include their mutual interactions. Such orbits are generally non-Keplerian and …
View article: Review of PSF reconstruction methods and application to post-processing
Review of PSF reconstruction methods and application to post-processing Open
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View article: Volume uncertainty of (7) Iris shape models from disc-resolved images
Volume uncertainty of (7) Iris shape models from disc-resolved images Open
High angular resolution disc-resolved images of (7) Iris collected by VLT/SPHERE instrument are allowed for the detailed shape modelling of this large asteroid revealing its surface features. If (7) Iris did not suffer any events catastrop…
View article: Traitement d’image en optique adaptative : estimation paramétrique de la réponse impulsionnelle et déconvolution
Traitement d’image en optique adaptative : estimation paramétrique de la réponse impulsionnelle et déconvolution Open
Imaging resolution is severely reduced in astronomy due to the atmospheric turbulence. The resulting Point Spread Function (PSF) is large and is equivalent to the one of a diffraction limited telescope of a dozen of centimetres in the visi…
View article: LEO satellite imaging with adaptive optics and marginalized blind deconvolution
LEO satellite imaging with adaptive optics and marginalized blind deconvolution Open
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View article: Joint estimation of atmospheric and instrumental defects using a parsimonious point spread function model
Joint estimation of atmospheric and instrumental defects using a parsimonious point spread function model Open
Context. Modeling the optical point spread function (PSF) is particularly challenging for adaptive optics (AO)-assisted observations owing to the its complex shape and spatial variations. Aims. We aim to (i) exhaustively demonstrate the ac…