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Proceedings Paper

SPIRou @CFHT: integration and performance of the cryogenic near infra-red spectrograph unit
Author(s): Zalpha Challita; Vlad Reshetov; Sébastien Baratchart; Gregory Barrick; Andres Carmona; Jean-François Donati; Yoan Micheau; Claire Moutou; Philippe Vallée; Marcel Belot; Gérard Gallou; Laurent Parès; Patrick Rabou; Simon Thibault; Driss Kouach; Marielle Lacombe; Leslie Saddlemyer; Nicolas Striebig
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Paper Abstract

SPIRou is an innovative near infra-red echelle spectropolarimeter and a high-precision velocimeter for the 3.6 m Canada-France-Hawaii Telescope (CFHT – Mauna Kea, Hawaii). This new generation instrument aims at detecting planetary worlds and Earth-like planets of nearby red dwarfs, in habitable zone, and studying the role of the stellar magnetic field during the process of low-mass stars / planets formation. The cryogenic spectrograph unit, cooled down at 80 K, is a fiber fed double-pass cross dispersed echelle spectrograph which works in the 0.98-2.40 μm wavelength range, allowing the coverage of the YJHK bands in a single exposure. Among the key parameters, a long-term thermal stability better than 2 mK, a relative radial velocity better than 1 m.s -1 and a spectral resolution of 70K are required. After ~ 1 year of assembly, integration and tests at IRAP/OMP (Toulouse, France) during 2016/2017, SPIRou was then shipped to Hawaii and completely re-integrated at CFHT during February 2018. A full instrument first light was performed on 24th of April 2018. The technical commissioning / science validation phase is in progress until June 2018, before opening to the science community. In this paper, we describe the work performed on integration and test of the opto-mechanical assemblies composing the spectrograph unit, firstly in-lab, in Toulouse and then on site, at CFHT. A review of the performances obtained in-lab (in 2017) and during the first on-sky results (in 2018) is also presented.

Paper Details

Date Published: 6 July 2018
PDF: 15 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070262 (6 July 2018); doi: 10.1117/12.2311999
Show Author Affiliations
Zalpha Challita, Institut de Recherche en Astrophysique et Planétologie (France)
Vlad Reshetov, NRC - Herzberg Astronomy & Astrophysics (Canada)
Sébastien Baratchart, Observatoire Midi-Pyrénées (France)
Gregory Barrick, Canada-France-Hawaii Telescope (United States)
Andres Carmona, Institut de Recherche en Astrophysique et Planétologie (France)
Jean-François Donati, Institut de Recherche en Astrophysique et Planétologie (France)
Yoan Micheau, Observatoire Midi-Pyrénées (France)
Claire Moutou, Canada-France-Hawaii Telescope (United States)
Philippe Vallée, Univ. de Montréal (Canada)
Marcel Belot, Observatoire Midi-Pyrénées (France)
Gérard Gallou, Observatoire Midi-Pyrénées (France)
Laurent Parès, Institut de Recherche en Astrophysique et Planétologie (France)
Patrick Rabou, Institut de Planétologie et d’Astrophysique de Grenoble, Univ. Joseph Fourier, CNRS (France)
Simon Thibault, Univ. Laval (Canada)
Driss Kouach, Observatoire Midi-Pyrénées (France)
Marielle Lacombe, Observatoire Midi-Pyrénées (France)
Leslie Saddlemyer, NRC - Herzberg Astronomy & Astrophysics (Canada)
Nicolas Striebig, Observatoire Midi-Pyrénées (France)

Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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