20 July 2010 Overview of the GYES instrument: a multifibre high-resolution spectrograph for the prime focus of the Canada-France-Hawaii Telescope
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ESA's cornerstone mission Gaia will construct a billion-star catalogue down to magnitude 20 but will only provide detailed chemical information for the brighter stars and will be lacking radial velocity at the faint end due to insufficient Signal-to-Noise Ratios (SNR). This calls for the deployment of a ground spectrograph under time scales coherent with those of Gaia for a complementary survey. The GYES instrument is a high resolution (~ 20,000) spectrometer proposed for installation on the Canada- France-Hawaii Telescope (CFHT) to perform this survey in the northern hemisphere. It exploits the large Field of View (FoV) available at the prime focus together with a high multiplex (~ 500 fibres) to achieve a SNR of 30 in two hours at magnitude 16 and render the survey possible on the order of 300 nights. The on-going feasibility study aims at jointly optimising all components of the system: the field corrector, the positioner, the fibres and the spectrograph. The key challenges consist in accommodating the components in the highly constrained environment of the primary focus, as well as in achieving maximum efficiency thanks to high transmission and minimum reconfiguration delays. Meanwhile, for GYES to have its first light at the time of Gaia's initial data release (2014-2015), it is mandatory to keep its complexity down by designing a predominantly passive instrument.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shan Mignot, Shan Mignot, Mathieu Cohen, Mathieu Cohen, Gavin Dalton, Gavin Dalton, Jean-Laurent Dournaux, Jean-Laurent Dournaux, Gilles Fasola, Gilles Fasola, Isabelle Guinouard, Isabelle Guinouard, David Horville, David Horville, Jean-Michel Huet, Jean-Michel Huet, Philippe Laporte, Philippe Laporte, Ian Lewis, Ian Lewis, Frédéric Royer, Frédéric Royer, "Overview of the GYES instrument: a multifibre high-resolution spectrograph for the prime focus of the Canada-France-Hawaii Telescope", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77354H (20 July 2010); doi: 10.1117/12.857094; https://doi.org/10.1117/12.857094


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