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Design of pre-optics for laser guide star wavefront sensor for the ELT
Eduard Muslimov, Kjetil Dohlen, Benoit Neichel +1
In the present paper, we consider the optical design of a zoom system for the active refocusing in laser guide star wavefront sensors. The system is designed according to the speci…
Performance of the extreme-AO instrument VLT/SPHERE and dependence on the atmospheric conditions
J. Milli, D. Mouillet, T. Fusco +10
SPHERE is the high-contrast exoplanet imager and spectrograph installed at the Unit Telescope 3 of the Very Large Telescope. After more than two years of regular operations, we ana…
The HIP 79977 debris disk in polarized light
N. Engler, H. M. Schmid, Ch. Thalmann +40
We present observations of the known edge-on debris disk around HIP 79977 (HD 146897, F star in Upper Sco, 123 pc), taken with the ZIMPOL differential polarimeter of the SPHERE ins…
Discovery of a warm, dusty giant planet around HIP65426
G. Chauvin, S. Desidera, A. -M. Lagrange +120
The SHINE program is a large high-contrast near-infrared survey of 600 young, nearby stars. It is aimed at searching for and characterizing new planetary systems using VLT/SPHERE's…
Exploring dust around HD142527 down to 0.025" / 4au using SPHERE/ZIMPOL
H. Avenhaus, S. P. Quanz, H. M. Schmid +25
We have observed the protoplanetary disk of the well-known young Herbig star HD 142527 using ZIMPOL Polarimetric Differential Imaging with the VBB (Very Broad Band, ~600-900nm) fil…
Fine cophasing of segmented aperture telescopes with ZELDA, a Zernike wavefront sensor in the diffraction-limited regime
Pierre Janin-Potiron, Mamadou N'Diaye, Patrice Martinez +3
Segmented aperture telescopes require an alignment procedure with successive steps from coarse alignment to monitoring process in order to provide very high optical quality images…