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Proceedings Paper

Concept and optical design of the cross-disperser module for CRIRES+
Author(s): E. Oliva; A. Tozzi; D. Ferruzzi; L. Origlia; A. Hatzes; R. Follert; T. Löwinger; N. Piskunov; U. Heiter; M. Lockhart; T. Marquart; E. Stempels; A. Reiners; G. Anglada-Escude; Ulf Seemann; R. J. Dorn; P. Bristow; D. Baade; B. Delabre; D. Gojak; J. Grunhut; Barbara Klein; M. Hilker; D. J. Ives; Y. Jung; H.-U. Kaeufl; F. Kerber; J. L. Lizon; L. Pasquini; J. Paufique; Eszter Pozna; A. Smette; J. Smoker; E. Valenti
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Paper Abstract

CRIRES, the ESO high resolution infrared spectrometer, is a unique instrument which allows astronomers to access a parameter space which up to now was largely uncharted. In its current setup, it consists of a single-order spectrograph providing long-slit, single-order spectroscopy with resolving power up to R=100,000 over a quite narrow spectral range. This has resulted in sub-optimal efficiency and use of telescope time for all the scientific programs requiring broad spectral coverage of compact objects (e.g. chemical abundances of stars and intergalactic medium, search and characterization of extra-solar planets). To overcome these limitations, a consortium was set-up for upgrading CRIRES to a cross-dispersed spectrometer, called CRIRES+. This paper presents the updated optical design of the cross-dispersion module for CRIRES+. This new module can be mounted in place of the current pre-disperser unit. The new system yields a factor of >10 increase in simultaneous spectral coverage and maintains a quite long slit (10”), ideal for observations of extended sources and for precise sky-background subtraction.

Paper Details

Date Published: 24 July 2014
PDF: 14 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91477R (24 July 2014); doi: 10.1117/12.2054381
Show Author Affiliations
E. Oliva, INAF - Osservatorio Astrofisico di Arcetri (Italy)
A. Tozzi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
D. Ferruzzi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
L. Origlia, INAF - Osservatorio Astronomico di Bologna (Italy)
A. Hatzes, Thüringer Landessternwarte Tautenburg (Germany)
R. Follert, Thüringer Landessternwarte Tautenburg (Germany)
T. Löwinger, Thüringer Landessternwarte Tautenburg (Germany)
N. Piskunov, Uppsala Univ. (Sweden)
U. Heiter, Uppsala Univ. (Sweden)
M. Lockhart, Uppsala Univ. (Sweden)
T. Marquart, Uppsala Univ. (Sweden)
E. Stempels, Uppsala Univ. (Sweden)
A. Reiners, Georg-August-Univ. Göttingen (Germany)
G. Anglada-Escude, Georg-August-Univ. Göttingen (Germany)
Ulf Seemann, Georg-August-Univ. Göttingen (Germany)
R. J. Dorn, European Southern Observatory (Germany)
P. Bristow, European Southern Observatory (Germany)
D. Baade, European Southern Observatory (Germany)
B. Delabre, European Southern Observatory (Germany)
D. Gojak, European Southern Observatory (Germany)
J. Grunhut, European Southern Observatory (Germany)
Barbara Klein, European Southern Observatory (Germany)
M. Hilker, European Southern Observatory (Germany)
D. J. Ives, European Southern Observatory (Germany)
Y. Jung, European Southern Observatory (Germany)
H.-U. Kaeufl, European Southern Observatory (Germany)
F. Kerber, European Southern Observatory (Germany)
J. L. Lizon, European Southern Observatory (Germany)
L. Pasquini, European Southern Observatory (Germany)
J. Paufique, European Southern Observatory (Germany)
Eszter Pozna, European Southern Observatory (Germany)
A. Smette, European Southern Observatory (Germany)
J. Smoker, European Southern Observatory (Germany)
E. Valenti, European Southern Observatory (Germany)


Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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