6 July 2018 SPIRou @CFHT: integration and performance of the cryogenic near infra-red spectrograph unit
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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.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zalpha Challita, Zalpha Challita, Vlad Reshetov, Vlad Reshetov, Sébastien Baratchart, Sébastien Baratchart, Gregory Barrick, Gregory Barrick, Andres Carmona, Andres Carmona, Jean-François Donati, Jean-François Donati, Yoan Micheau, Yoan Micheau, Claire Moutou, Claire Moutou, Philippe Vallée, Philippe Vallée, Marcel Belot, Marcel Belot, Gérard Gallou, Gérard Gallou, Laurent Parès, Laurent Parès, Patrick Rabou, Patrick Rabou, Simon Thibault, Simon Thibault, Driss Kouach, Driss Kouach, Marielle Lacombe, Marielle Lacombe, Leslie Saddlemyer, Leslie Saddlemyer, Nicolas Striebig, Nicolas Striebig, } "SPIRou @CFHT: integration and performance of the cryogenic near infra-red spectrograph unit", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070262 (6 July 2018); doi: 10.1117/12.2311999; https://doi.org/10.1117/12.2311999
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