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Paper detail

Progress of the CHARA/SPICA project

CHARA/SPICA (Stellar Parameters and Images with a Cophased Array) is currently being developed at Observatoire de la Côte d'Azur. It will be installed at the visible focus of the CHARA Array by the end of 2021. It has been designed to perform a large survey of fundamental stellar parameters with, in the possible cases, a detailed imaging of the surface or environment of stars. To reach the required precision and sensitivity, CHARA/SPICA combines a low spectral resolution mode R = 140 in the visible and single-mode fibers fed by the AO stages of CHARA. This setup generates additional needs before the interferometric combination: the compensation of atmospheric refraction and longitudinal dispersion, and the fringe stabilization. In this paper, we present the main features of the 6-telescopes fibered visible beam combiner (SPICA-VIS) together with the first laboratory and on-sky results of the fringe tracker (SPICA-FT). We describe also the new fringe-tracker simulator developed in parallel to SPICA-FT.

preprint2021arXivOpen access
C. PannetierD. MourardP. BerioF. CassaingF. AlloucheN. AnuguC. BailetT. ten BrummelaarJ. DejongheD. GiesL. JocouS. KrausS. LacourS. LagardeJ. B. Le BouquinD. LecronJ. MonnierN. NardettoF. PatruK. PerrautR. PetrovS. RousseauP. SteeJ. SturmannL. Sturmann
astro-ph.IM
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C. PannetierD. MourardP. BerioF. CassaingF. AlloucheN. AnuguC. BailetT. ten BrummelaarJ. DejongheD. GiesL. JocouS. KrausS. LacourS. LagardeJ. B. Le BouquinD. LecronJ. MonnierN. NardettoF. PatruK. PerrautR. PetrovS. RousseauP. SteeJ. SturmannL. Sturmann

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