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Proceedings Paper

MUSE: a second-generation integral-field spectrograph for the VLT
Author(s): Francois Henault; Roland Bacon; Christophe Bonneville; Didier Boudon; Roger Llewelyn Davies; Pierre Ferruit; Gerard F. Gilmore; Oliver LeFevre; Jean-Pierre Lemonnier; Simon Lilly; Simon L. Morris; Eric Prieto; Matthias Steinmetz; P. Tim de Zeeuw
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Paper Abstract

We describe MUSE (Multi Unit Spectroscopic Explorer), a second-generation integral-field spectrograph for the VLT, operating in the visible and near IR wavelength range. It combines a 1' x 1' Field of View with the improved spatial resolution (0.2") provided by adaptive optics and covers a large simultaneous spectral range (0.48 - 1 μm). With this unique combination of capabilities, MUSE has a wide domain of application, and a large discovery potential. It will provide ultra deep fields with a limiting magnitude for spectroscopy of R = 28. After a brief presentation of the scientific case and the derived instrument requirements, we will focus on the MUSE optical design, including the overall architecture, the major trade-off that were conducted in order to optimize the cost and performance, and a provisional implementation scheme of the instrument on the VLT Nasmyth platform. Then the most important optical subsystems (as the 3 x 8 Field-splitter, the Image Slicers and the Spectrometers) are described. One of MUSE special feature is the impressive number of Image Slicer and Spectrometer modules which must be manufactured, that is 24. The realization of such series has been studied in collaboration with an industrial company. Finally a preliminary estimation of the expected performance and a technological development program in order to secure the realization of the critical optical subsystems will be presented.

Paper Details

Date Published: 7 March 2003
PDF: 12 pages
Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); doi: 10.1117/12.462334
Show Author Affiliations
Francois Henault, CRAL-Observatoire de Lyon (France)
Roland Bacon, CRAL-Observatoire de Lyon (France)
Christophe Bonneville, Lab. d'Astrophysique de Marseille (France)
Didier Boudon, CRAL-Observatoire de Lyon (France)
Roger Llewelyn Davies, Univ. of Oxford (United Kingdom)
Pierre Ferruit, CRAL-Observatoire de Lyon (France)
Gerard F. Gilmore, Institute of Astronomy/Univ. of Cambridge (United Kingdom)
Oliver LeFevre, Lab. d'Astrophysique de Marseille (France)
Jean-Pierre Lemonnier, CRAL-Observatoire de Lyon (France)
Simon Lilly, Institute of Astronomy, ETH Zentrum (Switzerland)
Simon L. Morris, Univ. of Durham (United Kingdom)
Eric Prieto, Lab. d'Astrophysique de Marseille (France)
Matthias Steinmetz, Astrophysikalisches Institut Potsdam (Germany)
P. Tim de Zeeuw, Sterrewacht Leiden (Netherlands)

Published in SPIE Proceedings Vol. 4841:
Instrument Design and Performance for Optical/Infrared Ground-based Telescopes
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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