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SPIRou @CFHT: full in-lab and on-sky performances

Abstract : SPIRou is the new high resolution echelle spectropolarimeter and high-precision velocimeter, in the near infra- red, for the 3.6m Canada-France-Hawaii Telescope (CFHT Mauna Kea). This next generation instrument aims at detecting and characterizing Earth-like planets in the habitable zone of low-mass dwarfs and at investigating how magnetic fields impact star and planet formation. SPIRou consists of an achromatic polarimetric module coupled with a fluoride fiber link to a thermally-controlled cryogenic echelle spectrograph, and a Calibration Unit which can fed the light of hollow-cathod lamps, a radial velocity reference (Fabry-Pérot), or a cold source to the polarimeter and/or the spectrograph. Here we present a summary of the full performances obtained in laboratory tests carried in Toulouse (France), and the first results of the on-going commissioning at the CFHT. SPIRou covers a spectral range from 0.96 to 2.48 μm (YJHK domain) in one single exposure at a resolving power of 70 K, providing unpolarized and polarized spectra (with sensitivity 10 ppm) of stars, with a 10 15% peak throughput. Lab tests demonstrate that SPIRou is capable of achieving a relative radial velocity precision better than 0.2 m/s rms on timescales of 24 hr. Science operations of SPIRou are expected to start in 2018 S2, enabling significant synergies with major space and ground instruments such as the JWST, TESS, ALMA and later-on PLATO and the ELT.
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Contributor : Jean-Francois Donati <>
Submitted on : Monday, December 9, 2019 - 11:47:10 AM
Last modification on : Friday, September 18, 2020 - 3:16:07 PM



Andrés Carmona, Jean-François Donati, Claire Moutou, Etienne Artigau, Sébastien Baratchart, et al.. SPIRou @CFHT: full in-lab and on-sky performances. Ground-based and Airborne Instrumentation for Astronomy VII, Jun 2018, Austin, France. pp.41, ⟨10.1117/12.2313777⟩. ⟨obspm-02399870⟩



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