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Proceedings Paper

4MOST: the high-resolution spectrograph
Author(s): W. Seifert; W. Xu; P. Buschkamp; C. Feiz; A. Saviauk; S. Barden; A. Quirrenbach; H. Mandel
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Paper Abstract

4MOST (4-meter Multi-Object Spectroscopic Telescope) is a wide-field, fiber-feed, high-multiplex spectroscopic survey facility to be installed on the 4-meter ESO telescope VISTA in Chile. It consists of two identical low resolution spectrographs and one high resolution spectrograph. The instrument is presently in the preliminary design phase and expected to get operational end of 2022. The high resolution spectrograph will afford simultaneous observations of up to 812 targets - over a hexagonal field of view of ~ 4.1 sq.degrees on sky - with a spectral resolution R>18,000 covering a wavelength range from 393 to 679nm in three channels. In this paper we present the optical and mechanical design of the high resolution spectrograph (HRS) as prepared for the review at ESO, Garching. The expected performance including the highly multiplexed fiber slit concept is simulated and its impact on the optical performance given. We show the thermal and finite element analyses and the resulting stability of the spectrograph under operational conditions.

Paper Details

Date Published: 9 August 2016
PDF: 17 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990890 (9 August 2016); doi: 10.1117/12.2233252
Show Author Affiliations
W. Seifert, Landessternwarte Heidelberg (Germany)
W. Xu, Optical System Engineering (Germany)
Landessternwarte Heidelberg (Germany)
P. Buschkamp, Buschkamp Research Instruments (Germany)
Landessternwarte Heidelberg (Germany)
C. Feiz, Landessternwarte Heidelberg (Germany)
A. Saviauk, Leibniz-Institut für Astrophysik Potsdam (Germany)
S. Barden, Leibnitz Institut für Astrophysik Potsdam (Germany)
A. Quirrenbach, Landessternwarte Heidelberg (Germany)
H. Mandel, Landessternwarte Heidelberg (Germany)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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