Zobrazeno 1 - 10
of 169
pro vyhledávání: '"Petit, Cyril"'
Autor:
Anugu, Narsireddy, Brummelaar, Theo ten, Turner, Nils H., Anderson, Matthew D., Bouquin, Jean-Baptiste Le, Sturmann, Judit, Sturmann, Laszlo, Farrington, Chris, Vargas, Norm, Majoinen, Olli, Ireland, Michael J., Monnier, John D., Mourard, Denis, Schaefer, Gail, Gies, Douglas R., Ridgway, Stephen T., Kraus, Stefan, Petit, Cyril, Tallon, Michel, Lim, Caroline B., Berio, Philippe
The CHARA Array is the longest baseline optical interferometer in the world. Operated with natural seeing, it has delivered landmark sub-milliarcsecond results in the areas of stellar imaging, binaries, and stellar diameters. However, to achieve ambi
Externí odkaz:
http://arxiv.org/abs/2012.11667
Autor:
Lai-Tim, Yann, Mugnier, Laurent, Krafft, Léa, Chen, Antoine, Petit, Cyril, Mecê, Pedro, Grieve, Kate, Paques, Michel, Meimon, Serge
Structured illumination microscopy (SIM) is one of the most versatile super-resolution techniques. Yet, its application to live imaging has been so far mainly limited to fluorescent and stationary specimens. Here, we present advancements in SIM to jo
Externí odkaz:
http://arxiv.org/abs/2007.16028
Autor:
Schwartz, Noah, Sauvage, Jean-François, Renault, Edgard, Correia, Carlos, Neichel, Benoit, Fusco, Thierry, Dohlen, Kjetil, Hadi, Kacem El, Petit, Cyril, Choquet, Elodie, Chambouleyron, Vincent, Paufique, Jerome, Clarke, Fraser, Thatte, Niranjan, Bryson, Ian
Current designs for all three extremely large telescopes show the overwhelming adoption of the pyramid wavefront sensor (P-WFS) as the WFS of choice for adaptive optics (AO) systems sensing on natural guide stars (NGS) or extended objects. The key ad
Externí odkaz:
http://arxiv.org/abs/2003.07228
Autor:
Perrot, Clément, Thebault, Philippe, Lagrange, Anne-Marie, Boccaletti, Anthony, Vigan, Arthur, Desidera, Silvano, Augereau, Jean-Charles, Bonnefoy, Mickael, Choquet, Élodie, Kral, Quentin, Loh, Alan, Maire, Anne-Lise, Ménard, François, Messina, Sergio, Olofsson, Johan, Gratton, Raffaele, Biller, Beth, Brandner, Wolfgang, Buenzli, Esther, Chauvin, Gaël, Cheetham, Anthony, Daemgen, Sebastien, Delorme, Philippe, Feldt, Markus, Lagadec, Eric, Langlois, Maud, Lannier, Justine, Mesa, Dino, Mouillet, David, Peretti, Sébastien, Janin-Potiron, Pierre, Salter, Graeme, Sissa, Elena, Roux, Alain, Llored, Marc, Buey, Jean-Tristan, Pavlov, Alexei, Weber, Luc, Petit, Cyril
Publikováno v:
2019A&A...626A..95P Astronomy & Astrophysics, Volume 626, id.A95, 11 pp. Astronomy & Astrophysics, Volume 626, id.A95, 11 pp
Context. Direct imaging of debris discs gives important information about their nature, their global morphology, and allows us to identify specific structures possibly in connection with the presence of gravitational perturbers. It is the most straig
Externí odkaz:
http://arxiv.org/abs/1908.05335
Autor:
Fétick, Romain, Fusco, Thierry, Neichel, Benoit, Mugnier, Laurent, Beltramo-Martin, Olivier, Bonnefois, Aurélie, Petit, Cyril, Milli, Julien, Vernet, Joel, Oberti, Sylvain, Bacon, Roland
Context. Adaptive optics (AO) systems greatly increase the resolution of large telescopes, but produce complex point spread function (PSF) shapes, varying in time and across the field of view. This PSF must be accurately known since it provides cruci
Externí odkaz:
http://arxiv.org/abs/1908.02200
Autor:
Schwartz, Noah, Sauvage, Jean-François, Correia, Carlos, Petit, Cyril, Quiros-Pacheco, Fernando, Fusco, Thierry, Dohlen, Kjetil, Hadi, Kacem El, Thatte, Niranjan, Clarke, Fraser, Paufique, Jérome, Vernet, Joel
The segmentation of the telescope pupil (by spiders & the segmented M4) create areas of phase isolated by the width of the spiders on the wavefront sensor (WFS), breaking the spatial continuity of the wavefront. The poor sensitivity of the Pyramid WF
Externí odkaz:
http://arxiv.org/abs/1809.08839
Autor:
Correia, Carlos M., Neichel, Benoit, Conan, Jean-Marc, Petit, Cyril, Sauvage, Jean-Francois, Fusco, Thierry, Vernet, Joel D. R., Thatte, Niranjan
Sky-coverage in laser-assisted AO observations largely depends on the system's capability to guide on the faintest natural guide-stars possible. Here we give an up-to-date status of our natural guide-star processing tailored to the European-ELT's vis
Externí odkaz:
http://arxiv.org/abs/1607.05170
Autor:
Petit, Cyril
La turbulence atmosphérique limite sévèrement la formation d'images par lestélescopes astronomiques au sol. L'Optique Adaptative (OA) est une techniquede correction en temps réel des effets de la turbulence permettant d'améliorerla résolution
Externí odkaz:
http://tel.archives-ouvertes.fr/tel-00134154
http://tel.archives-ouvertes.fr/docs/00/13/41/54/PDF/main_final.pdf
http://tel.archives-ouvertes.fr/docs/00/13/41/54/PDF/main_final.pdf
Autor:
Gray, Morgan, Petit, Cyril, Rodionov, Sergey, Bocquet, Marc, Bertino, Laurent, Ferrari, Marc, Fusco, Thierry
Publikováno v:
Optics Express, Vol. 22, Issue 17, pp. 20894-20913 (2014)
We propose a new algorithm for an adaptive optics system control law, based on the Linear Quadratic Gaussian approach and a Kalman Filter adaptation with localizations. It allows to handle non-stationary behaviors, to obtain performance close to the
Externí odkaz:
http://arxiv.org/abs/1408.7069
Autor:
Gray, Morgan, Petit, Cyril, Rodionov, Sergey, Bertino, Laurent, Bocquet, Marc, Fusco, Thierry
We propose a new algorithm for an adaptive optics system control law which allows to reduce the computational burden in the case of an Extremely Large Telescope (ELT) and to deal with non-stationary behaviors of the turbulence. This approach, using E
Externí odkaz:
http://arxiv.org/abs/1310.5954