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General formalism for Fourier based Wave Front Sensing
Olivier Fauvarque, Benoit Neichel, Thierry Fusco +2
We introduce in this article a general formalism for Fourier based wave front sensing. To do so, we consider the filtering mask as a free parameter. Such an approach allows to unif…
Speckle lifetime in XAO coronagraphic images: temporal evolution of SPHERE coronagraphic images
J. Milli, T. Banas, D. Mouill +11
The major source of noise in high-contrast imaging is the presence of slowly evolving speckles that do not average with time. The temporal stability of the point-spread-function (P…
Natural guide-star processing for wide-field laser-assisted AO systems
Carlos M. Correia, Benoit Neichel, Jean-Marc Conan +5
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 o…
General formalism for Fourier based Wave Front Sensing: application to the Pyramid wave front sensors
Olivier Fauvarque, Benoit Neichel, Thierry Fusco +2
In this article, we compare a set of Wave Front Sensors (WFS) based on Fourier filtering technique. In particular, this study explores the "class of pyramidal WFS" defined as the 4…
VLT/SPHERE deep insight of NGC 3603's core: Segregation or confusion?
Z. Khorrami, T. Lanz, F. Vakili +19
We present new near-infrared photometric measurements of the core of the young massive cluster NGC 3603 obtained with extreme adaptive optics. The data were obtained with the SPHER…