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Wavelength calibration from 1-5 mu m for the CRIRES plus high-resolution spectrograph at the VLT
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2014 (English)In: GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY V, 2014, Vol. 9147, 91475GConference paper (Refereed)
Abstract [en]

CRIRES at the VLT is one of the few adaptive optics enabled instruments that offer a resolving power of 10 5 from 1 - 5 mu m. 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 (similar to lambda/70 in a single-order) by a factor of greater than or similar to 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 3m/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 mu m), employing hollow-cathode emission lamps, Fabry-Perot etalons, and absorption gas-cells.

Place, publisher, year, edition, pages
2014. Vol. 9147, 91475G
, Proceedings of SPIE, ISSN 0277-786X
Keyword [en]
astronomical instrumentation, infrared spectrographs, high spectral resolution, upgrade of existing VLT instruments, infrared spectrometers, wavelength calibration, radial-velocities, extra-solar planets
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-257492DOI: 10.1117/12.2056668ISI: 000354527800168ISBN: 978-0-8194-9615-7OAI: oai:DiVA.org:uu-257492DiVA: diva2:846399
5th Conference on Ground-Based and Airborne Instrumentation for Astronomy, JUN 22-26, 2014, Montreal, CANADA
Available from: 2015-08-17 Created: 2015-07-02 Last updated: 2015-11-05

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Heiter, UlrikeMarquart, ThomasPiskunov, NikolaiStempels, Eric
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