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Paper detail

NIRPS Front-End: Design, performance, and lessons learned

NIRPS (Near Infra-Red Planet Searcher) is an AO-assisted and fiber-fed spectrograph for high precision radial velocity measurements in the YJH-bands. NIRPS also has the specificity to be an SCAO assisted instrument, enabling the use of few-mode fibers for the first time. This choice offers an excellent trade-off by allowing to design a compact cryogenic spectrograph, while maintaining a high coupling efficiency under bad seeing conditions and for faint stars. The main drawback resides in a much more important modal-noise, a problem that has to be tackled for allowing 1m/s precision radial velocity measurements. In this paper, we present the NIRPS Front-End: an overview of its design (opto-mechanics, control), its performance on-sky, as well as a few lessons learned along the way.

preprint2022arXivOpen access
N. BlindU. ConodA. de MeiderosF. WildiF. BouchyS. BovayD. BrousseauA. CabralL. GenoletJ. KolbR. SchnellA. SegoviaM. SordetS. ThibaultB. WehbeG. Zins
astro-ph.IM
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N. BlindU. ConodA. de MeiderosF. WildiF. BouchyS. BovayD. BrousseauA. CabralL. GenoletJ. KolbR. SchnellA. SegoviaM. SordetS. ThibaultB. WehbeG. Zins

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