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Proceedings Paper

Wavelength calibration from 1-5μm for the CRIRES+ high-resolution spectrograph at the VLT
Author(s): U. Seemann; G. Anglada-Escude; D. Baade; P. Bristow; R. J. Dorn; R. Follert; D. Gojak; J. Grunhut; A. P. Hatzes; U. Heiter; D. J. Ives; P. Jeep; Y. Jung; H.-U. Käufl; F. Kerber; B. Klein; J.-L. Lizon; M. Lockhart; T. Löwinger; T. Marquart; E. Oliva; J. Paufique; N. Piskunov; Eszter Pozna; A. Reiners; A. Smette; J. Smoker; E. Stempels; E. Valenti
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Paper Abstract

CRIRES at the VLT is one of the few adaptive optics enabled instruments that offer a resolving power of 105 from 1 − 5 μm. An instrument upgrade (CRIRES+) is proposed to implement cross-dispersion capabilities, spectro-polarimetry modes, a new detector mosaic, and a new gas absorption cell. CRIRES+ will boost the simultaneous wavelength coverage of the current instrument (~ γ/70 in a single-order) by a factor of 10 in the cross-dispersed configuration, while still retaining a ~> 10 arcsec slit suitable for long-slit spectroscopy. CRIRES+ dramatically enhances the instrument’s observing efficiency, and opens new scientific opportunities. These include high-precision radial-velocity studies on the 3 m/s level to characterize extra-solar planets and their athmospheres, which demand for specialized, highly accurate wavelength calibration techniques. In this paper, we present a newly developed absorption gas-cell to enable high-precision wavelength calibration for CRIRES+. We also discuss the strategies and developments to cover the full operational spectral range (1 − 5 μµm), employing cathode emission lamps, Fabry-Perot etalons, and absorption gas-cells.

Paper Details

Date Published: 6 August 2014
PDF: 13 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91475G (6 August 2014); doi: 10.1117/12.2056668
Show Author Affiliations
U. Seemann, Georg-August-Univ. Göttingen (Germany)
G. Anglada-Escude, Georg-August-Univ. Göttingen (Germany)
D. Baade, European Southern Observatory (Germany)
P. Bristow, European Southern Observatory (Germany)
R. J. Dorn, European Southern Observatory (Germany)
R. Follert, Thüringer Landessternwarte Tautenburg (Germany)
D. Gojak, European Southern Observatory (Germany)
J. Grunhut, European Southern Observatory (Germany)
A. P. Hatzes, Thüringer Landessternwarte Tautenburg (Germany)
U. Heiter, Uppsala Univ. (Sweden)
D. J. Ives, European Southern Observatory (Germany)
P. Jeep, Georg-August Univ. Göttingen (Germany)
Y. Jung, European Southern Observatory (Germany)
H.-U. Käufl, European Southern Observatory (Germany)
F. Kerber, European Southern Observatory (Germany)
B. Klein, European Southern Observatory (Germany)
J.-L. Lizon, European Southern Observatory (Germany)
M. Lockhart, Uppsala Univ. (Sweden)
T. Löwinger, Thüringer Landessternwarte Tautenburg (Germany)
T. Marquart, Uppsala Univ. (Sweden)
E. Oliva, INAF - Osservatorio Astrofisico di Arcetri (Italy)
J. Paufique, European Southern Observatory (Germany)
N. Piskunov, Uppsala Univ. (Sweden)
Eszter Pozna, European Southern Observatory (Germany)
A. Reiners, Georg-August-Univ. Göttingen (Germany)
A. Smette, European Southern Observatory (Germany)
J. Smoker, European Southern Observatory (Germany)
E. Stempels, Uppsala Univ. (Sweden)
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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