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Proceedings Paper

High resolution spectrograph for the 4MOST facility
Author(s): Shan Mignot; Jean-Philippe Amans; Mathieu Cohen; David Horville; Pascal Jagourel
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Paper Abstract

4MOST (4-metre Multi-Object Spectrograph Telescope) is a wide field and high multiplex fibre-fed spectroscopic facility continuously running a public survey on one of ESO's 4-metre telescopes (NTT or VISTA). It is currently undergoing a concept study and comprises a multi-object (300) high resolution (20 000) spectrograph whose purpose is to provide detailed chemical information in two wavelength ranges (395-456.5 nm and 587-673 nm). It will complement the data produced by ESA's space mission Gaia to form an unprecedented galactic-archaeology picture of the Milky Way as the result of the public survey. Building on the developments carried out for the GYES1 instrument on the Canada- France-Hawaii Telescope in 2010, the spectrograph is intended as being athermal and not featuring any motorised parts for high reliability and minimum maintenance, thereby allowing it to operate every night for five years. In addition to the fixed configuration which allows fine-tuning the spectrograph to a precise need, it features a dual-arm architecture with volume-phase holographic gratings to achieve the required dispersion at a maximum efficiency in each channel. By combining high yield time-wise and photon-wise, the spectrograph is expected to deliver more than a million spectra and make the most out of the selected 4-metre telescope.

Paper Details

Date Published: 24 September 2012
PDF: 10 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84464X (24 September 2012); doi: 10.1117/12.925958
Show Author Affiliations
Shan Mignot, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
Jean-Philippe Amans, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
Mathieu Cohen, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
David Horville, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
Pascal Jagourel, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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