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4 papers · 2 filters
Euclid preparation. XXIX. Water ice in spacecraft part I: The physics of ice formation and contamination
Euclid Collaboration, M. Schirmer, K. Thürmer +218
Molecular contamination is a well-known problem in space flight. Water is the most common contaminant and alters numerous properties of a cryogenic optical system. Too much ice mea…
Observing exoplanets from Antarctica in two colours: Set-up and operation of ASTEP+
François-Xavier Schmider, Lyu Abe, Abdelkrim Agabi +12
On December 2021, a new camera box for two-colour simultaneous visible photometry was successfully installed on the ASTEP telescope at the Concordia station in Antarctica. The new…
Intensity Interferometry observations of the H envelope of Cas with MéO and a portable telescope
Nolan Matthews, Jean-Pierre Rivet, David Vernet +9
We report on observations of the extended environment of the bright Be star -Cas performed using intensity interferometry measurements within its H emission line. These obser…
Low-order wavefront control using a Zernike sensor through Lyot coronagraphs for exoplanet imaging: II. Concurrent operation with stroke minimization
R. Pourcelot, E. H. Por, M. N'Diaye +16
Wavefront sensing and control (WFSC) will play a key role in improving the stability of future large segmented space telescopes while relaxing the thermo-mechanical constraints on…