A. Caillat
Aix-Marseille University
15 Papers
106 Citations
A. Caillat is an academic researcher from Aix-Marseille University. The author has contributed to research in topics: Coronagraph & Wavefront. The author has an hindex of 6, co-authored 12 publications. Previous affiliations of A. Caillat include Max Planck Society.
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Papers
Calibration of quasi-static aberrations in exoplanet direct-imaging instruments with a Zernike phase-mask sensor. III. On-sky validation in VLT/SPHERE
Arthur Vigan,Mamadou N'Diaye,Kjetil Dohlen,Jean-François Sauvage,Julien Milli,Gerard Zins,Cyril Petit,Z. Wahhaj,Faustine Cantalloube,A. Caillat,A. Costille,J. Le Merrer,Alexis Carlotti,Jean-Luc Beuzit,David Mouillet +14 more
TL;DR: In this paper, the authors used a Zernike wavefront sensor called ZELDA for detecting NCPAs in VLT/SPHERE and their compensation, and showed that the NCA compensation can attenuate the amount of aberration by a factor of approximately two.
Calibration of quasi-static aberrations in exoplanet direct-imaging instruments with a Zernike phase-mask sensor. II. Concept validation with ZELDA on VLT/SPHERE
Mamadou N'Diaye,Arthur Vigan,Arthur Vigan,Kjetil Dohlen,Jean-François Sauvage,A. Caillat,Anne Costille,Julien Girard,J. L. Beuzit,J. L. Beuzit,Thierry Fusco,P. Blanchard,J. Le Merrer,D. Le Mignant,F. Madec,Gabriel Moreaux,David Mouillet,David Mouillet,Pascal Puget,Pascal Puget,G. Zins,G. Zins,G. Zins +22 more
TL;DR: ZELDA as mentioned in this paper is a wavefront sensor based on Zernike phase contrast methods to circumvent the differential aberrations between the extreme adaptive optics (ExAO) sensing path and the science path for the detection of giant planets with a contrast lower than a few $10-6}$ at very small separations (<0.3
Calibration of quasi-static aberrations in exoplanet direct-imaging instruments with a Zernike phase-mask sensor - II. Concept validation with ZELDA on VLT/SPHERE
Mamadou N'Diaye,Arthur Vigan,Arthur Vigan,Kjetil Dohlen,Jean-François Sauvage,A. Caillat,Anne Costille,Julien Girard,J. L. Beuzit,J. L. Beuzit,Thierry Fusco,P. Blanchard,J. Le Merrer,D. Le Mignant,F. Madec,Gabriel Moreaux,David Mouillet,David Mouillet,Pascal Puget,Pascal Puget,G. Zins,G. Zins,G. Zins +22 more
TL;DR: ZELDA as mentioned in this paper is a wavefront sensor based on Zernike phase-contrast methods to circumvent the low spatial frequency differential aberrations between the ExAO sensing path and the science path.
Calibration of quasi-static aberrations in exoplanet direct-imaging instruments with a Zernike phase-mask sensor. III. On-sky validation in VLT/SPHERE
Arthur Vigan,Mamadou N'Diaye,Kjetil Dohlen,Jean-François Sauvage,Julien Milli,Gerard Zins,Cyril Petit,Z. Wahhaj,Faustine Cantalloube,A. Caillat,A. Costille,J. Le Merrer,Alexis Carlotti,Jean-Luc Beuzit,David Mouillet +14 more
TL;DR: In this paper, an improved procedure for the compensation of NCPAs was proposed to improve the performance of second-generation exoplanet imagers using extreme adaptive optics (ExAO) and coronagraphy.
Laboratory validation of the dual-zone phase mask coronagraph in broadband light at the high-contrast imaging THD testbed
J. R. Delorme,Mamadou N'Diaye,R. Galicher,Kjetil Dohlen,Pierre Baudoz,A. Caillat,Gérard Rousset,Rémi Soummer,O. Dupuis +8 more
TL;DR: In this article, the dual-zone phase mask coronagraph was used to detect and spectrally characterize old or light gaseous planets around nearby stars in broadband light, achieving contrast levels of 4 x 10(-8) between 7 and 17 lambda(0)/D in broadband (λ(0) = 675 nm, Delta lambda = 250 and Delta lambda/lambda(0), respectively).