First light from the Dome C (Antarctica) of a phase knife stellar coronagraph

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dc.creatorGuerri, Geraldine
dc.creatorAbe, Lyu
dc.creatorDaban, Jean-Baptiste
dc.creatorAristidi, Eric
dc.creatorBendjoya, Philippe
dc.creatorRivet, Jean-Pierre
dc.creatorVakili, Farrokh
dc.date2009-02-13
dc.date.accessioned2026-07-07T12:41:37Z
dc.date.available2026-07-07T12:41:37Z
dc.descriptionWe report on the first daytime on-sky results of a Phase Knife stellar Coronagraph operated in the visible from the French-Italian Concordia station at Dome C of Antarctica. This site has proven in the last few years to offer excellent atmospheric seeing conditions for high spatial resolution observations. The coronagraphic performances obtained from laboratory experiments and numerical models have been compared with those measured from daytime on-sky data recorded on bright single and multiple stars: Canopus (HD 45348), and alpha Centauri (HD 128620J). No correction system was used (adaptive optics or tip-tilt mirror) so that atmospheric turbulence alone defines the image quality, and thus the coronagraphic performances. Moreover, the experiment could not run under optimal operational conditions due to hardware/software problems. Satisfactory results have been obtained: broad band total rejection exceeding 15 were attained in the visible. This first day-time observation campaign yields an experimental feedback on how to improve the instrument to get optimal performances during future night-time observation runs.
dc.description18 pages, 12 figures
dc.identifierhttps://arxiv.org/abs/0902.2326
dc.identifierhttp://arxiv.org/abs/0902.2326
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219831
dc.subjectInstrumentation and Methods for Astrophysics
dc.titleFirst light from the Dome C (Antarctica) of a phase knife stellar coronagraph
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