23 citations · 71 across the 8 of their papers we have counts for
7 papers · 1 filter
Addressing the low-wind effect with the Lyot-based low-order wavefront sensor on SCExAO
Garima Singh, Sebastien Vievard, Julien Lozi +5
The Low-Wind Effect (LWE) is a well-known issue that affects the coronagraphic capabilities of instruments optimized to take direct images of exoplanets. This effect is prominent i…
AO3k + SCExAO: on-sky wavefront quality and demonstration of novel WFS techniques with the double XAO system
Julien Lozi, Kyohoon Ahn, Vincent Deo +5
The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system, fed by its upstream 3000-actuator "woofer" (AO3k), serves both as a platform for high contrast imaging (HCI) techn…
FIRST-PL: Commissioning the first visible photonic lantern spectrograph for sub-diffraction-limit astronomy on Subaru/SCExAO
Sebastien Vievard, Elsa Huby, Sylvestre Lacour +18
FIRST-PL (Fibered Imager foR a Single Telescope - Photonic Lantern) is a newly commissioned visible-light instrument on Subaru/SCExAO achieving spectroscopy below the diffraction l…
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…
Comparing focal plane wavefront control techniques:\\Numerical simulations and laboratory experiments
Axel Potier, Pierre Baudoz, Raphaël Galicher +2
Fewer than 1% of all exoplanets detected to date have been characterized on the basis of spectroscopic observations of their atmosphere. Unlike indirect methods, high-contrast imag…
Active minimization of non-common path aberrations in long-exposure imaging of exoplanetary systems
Garima Singh, Raphaël Galicher, Pierre Baudoz +5
Context. Spectroscopy of exoplanets is very challenging because of the high star-planet contrast. A technical difficulty in the design of imaging instruments is the noncommon path…
Characterizing Vibrations at the Subaru Telescope for the Subaru Coronagraphic Extreme Adaptive Optics instrument
Julien Lozi, Olivier Guyon, Nemanja Jovanovic +6
Vibrations are a key source of image degradation in ground-based instrumentation, especially for high-contrast imaging instruments. Vibrations reduce the quality of the correction…