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Proceedings Paper

Upgrading CRIRES-VLT to cross-dispersed mode
Author(s): E. Oliva; A. Hatzes; N. Piskunov; A. Reiners; H. U. Käufl; D. Ferruzzi; A. Tozzi; L. Origlia
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Paper Abstract

The cryogenic high resolution IR echelle spectrograph CRIRES is the ESO infrared (0.95−5.4 μm) high resolution spectrograph operating at the Nasmyth A focus of VLT-UT1. The instrument provides long-slit (31") spectroscopy with resolving power up to R=100,000 over a quite narrow wavelengths range, about 1/70 of the central wavelength. Observations of compact objects (e.g. stellar photospheres) could be made much more efficient by implementing a cross-dispersed mode, which increases the simultaneous spectral coverage by an order of magnitude or more. This paper presents the design of a relatively simple system to add cross-dispersed modes to CRIRES with a minimum impact on the instrument optics and mechanics.

Paper Details

Date Published: 24 September 2012
PDF: 6 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84462N (24 September 2012); doi: 10.1117/12.924969
Show Author Affiliations
E. Oliva, INAF - Osservatorio Astrofisico di Arcetri (Italy)
A. Hatzes, Thüringer Landessternwarte (Germany)
N. Piskunov, Uppsala Astronomical Observatory and Univ. (Sweden)
A. Reiners, Georg-August-Univ. Göttingen (Germany)
H. U. Käufl, European Southern Observatory (Germany)
D. Ferruzzi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
A. Tozzi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
L. Origlia, INAF - Osservatorio Astronomico di Bologna (Italy)

Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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