24 September 2012 High resolution spectrograph for the 4MOST facility
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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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shan Mignot, Shan Mignot, Jean-Philippe Amans, Jean-Philippe Amans, Mathieu Cohen, Mathieu Cohen, David Horville, David Horville, Pascal Jagourel, Pascal Jagourel, } "High resolution spectrograph for the 4MOST facility", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84464X (24 September 2012); doi: 10.1117/12.925958; https://doi.org/10.1117/12.925958


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