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RISTRETTO: Assembly and Testing of the Seven-spaxel, High-resolution, Diffraction-limited Spectrograph
Abstract
The RISTRETTO project aims at the direct detection of the reflected light of extra-solar planets to measure albedos and detect possible biosignatures, using the high-contrast / high-resolution method. We report on the assembly, lab-testing and on-sky testing of the seven-spaxel high-resolution single-mode spectrograph which was built ahead of the rest of the instrument. The spectrograph is a high resolution echelle spectrograph build for high spectral fidelity being uder vacuum and thermally controlled. Once the assembly has been completed we had the chance to test it on sky using OHP 1.52 m telescope using the PAPYRUS AO system for injection in our spectrograph.
Versions
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BibTeX
@misc{hoerner2026ristretto,
title = {{RISTRETTO: Assembly and Testing of the Seven-spaxel, High-resolution, Diffraction-limited Spectrograph}},
author = {Leonie Hoerner and Bruno Chazelas and Nathanaël Restori and Christophe Lovis and Nicolas Blind and Ludovic Genolet and Ian Hughes and Michael Sordet and Robin Schnell and Anthony Carvalho and Maddalena Bugatti and Adrien Crausaz and Samuel Rihs and Gilles Simond and Isaac Bernardino Dinis and David Ehrenreich and Emeline Bolmont and Christoph Mordasini and Martin Turbet and Angelie Alagao and Vincent Chambouleyron and Mathieu Motte and Arnaud Striffling and Francissco Oyarzun and Benoit Neichel and Jean-François Sauvage and Thierry Fusco},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.25867},
eprint = {2608.25867},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.25867},
}
RIS
TY - UNPB
TI - RISTRETTO: Assembly and Testing of the Seven-spaxel, High-resolution, Diffraction-limited Spectrograph
AU - Leonie Hoerner
AU - Bruno Chazelas
AU - Nathanaël Restori
AU - Christophe Lovis
AU - Nicolas Blind
AU - Ludovic Genolet
AU - Ian Hughes
AU - Michael Sordet
AU - Robin Schnell
AU - Anthony Carvalho
AU - Maddalena Bugatti
AU - Adrien Crausaz
AU - Samuel Rihs
AU - Gilles Simond
AU - Isaac Bernardino Dinis
AU - David Ehrenreich
AU - Emeline Bolmont
AU - Christoph Mordasini
AU - Martin Turbet
AU - Angelie Alagao
AU - Vincent Chambouleyron
AU - Mathieu Motte
AU - Arnaud Striffling
AU - Francissco Oyarzun
AU - Benoit Neichel
AU - Jean-François Sauvage
AU - Thierry Fusco
PY - 2026
DA - 2026/08/26
PB - arXiv
DO - 10.48550/arxiv.2608.25867
UR - https://arxiv.org/abs/2608.25867
AB - The RISTRETTO project aims at the direct detection of the reflected light of extra-solar planets to measure albedos and detect possible biosignatures, using the high-contrast / high-resolution method. We report on the assembly, lab-testing and on-sky testing of the seven-spaxel high-resolution single-mode spectrograph which was built ahead of the rest of the instrument. The spectrograph is a high resolution echelle spectrograph build for high spectral fidelity being uder vacuum and thermally controlled. Once the assembly has been completed we had the chance to test it on sky using OHP 1.52 m telescope using the PAPYRUS AO system for injection in our spectrograph.
ER -