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The ESO Spectroscopic facility
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The ESO Spectroscopic facility
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We present the concept of a novel facility dedicated to massively-multiplexed spectroscopy. The telescope has a very wide field Cassegrain focus optimised for fibre feeding. With a Field of View (FoV) of 2.5 degrees diameter and a 11.4m pupil, it will be the largest etendue telescope. The large focal plane can easily host up to 16.000 fibres. In addition, a gravity invariant focus for the central 10 arc-minutes is available to host a giant integral field unit (IFU). The 3 lenses corrector includes an ADC, and has good performance in the 360-1300 nm wavelength range. The top level science requirements were developed by a dedicated ESO working group, and one of the primary cases is high resolution spectroscopy of GAIA stars and, in general, how our Galaxy formed and evolves. The facility will therefore be equipped with both, high and low resolution spectrographs. We stress the importance of developing the telescope and instrument designs simultaneously. The most relevant R\&D aspect is also briefly discussed.
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Cited by 1 Pith paper
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SpecTel: A 10-12 meter class Spectroscopic Survey Telescope
Recommends an 11.4 m spectroscopic survey telescope with 5 deg² FOV and 15,000 fibers for massively multiplexed spectroscopy to complement Gaia, LSST, Euclid, and WFIRST.
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