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Wide Field Astronomy at Dome C: two IR surveys complementary to SNAP
D. Burgarella, M. Ferrari, T. Fusco +4
Surveys provide a wealth of data to the astronomical community that are used well after their completion. In this paper, we propose a project that would take the maximum benefit of…
Five new very low mass binaries
G. Montagnier, D. Segransan, J. -L. Beuzit +12
We report the discovery of companions to 5 nearby late M dwarfs (>M5), LHS1901, LHS4009, LHS6167, LP869-26 and WT460, and we confirm that the recently discovered mid-T brown dwarf…
PSF reconstruction for NAOS-CONICA
Yann Clénet, Markus Kasper, Eric Gendron +7
Adaptive optics (AO) allows one to derive the point spread function (PSF) simultaneously to the science image, which is a major advantage in post-processing tasks such as astrometr…
New algorithms for adaptive optics point-spread function reconstruction
Eric Gendron, Yann Clénet, Thierry Fusco +1
Context. The knowledge of the point-spread function compensated by adaptive optics is of prime importance in several image restoration techniques such as deconvolution and astromet…
Post processing of differential images for direct extrasolar planet detection from the ground
J. -F. Sauvage, L. Mugnier, T. Fusco +1
The direct imaging from the ground of extrasolar planets has become today a major astronomical and biological focus. This kind of imaging requires simultaneously the use of a dedic…
ELTs Adaptive Optics for Multi-Objects 3D Spectroscopy : Key Parameters and Design Rules
B. Neichel, J-M. Conan, T. Fusco +4
In the last few years, new Adaptive Optics [AO] techniques have emerged to answer new astronomical challenges: Ground-Layer AO [GLAO] and Multi-Conjugate AO [MCAO] to access a wide…
Probing long-period companions to planetary hosts. VLT and CFHT near infrared coronographic imaging surveys
G. Chauvin, A. -M. Lagrange, S. Udry +5
We present the results of a deep imaging survey of stars surrounded by planets detected with the radial velocity technique. The purpose is to search for and to characterize long-pe…