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RISTRETTO: Seven Spaxels Single Mode Spectrograph Design

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arxiv 2208.14875 v1 pith:IY3ZZHB3 submitted 2022-08-31 astro-ph.IM

Bruno Chazelas , Christophe Lovis , Nicolas Blind , Ludovic Genolet , Ian Hughes , Michael Sordet , Robin Schnell , Anthony Carvalho
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Maddalena Bugatti
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keywords modesinglespectrographinstrumentorderdesignfibersristretto
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The RISTRETTO project is aiming to build an instrument that will detect the reflected light from close-by exoplanet. It is a two stage instrument: An extreme AO system in the visible, followed by a seven spaxel single mode High resolution Spectrograph. In this paper we present the design of this spectrograph: a classical echelle spectrograph fed with single mode fibers. Standard single mode fibers have been chosen and are forming a long tilted slit in order to have the right order spacing on the detector. The instrument will be under vacuum and thermally controlled in order to make it stable.

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  1. Instrumentation prospects for rocky exoplanet atmospheres studies with high resolution spectroscopy

    astro-ph.EP 2025-05 conditional novelty 5.0 of 10

    Higher spectral resolution (R=300,000) materially reduces the exposure time needed to detect oxygen A-band absorption in hazy, cloudy exoplanet atmospheres relative to R=100,000.

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