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Concept and optical design of the cross-disperser module for CRIRES+
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2014 (English)In: GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY V, 2014, Vol. 9147, 91477RConference paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
2014. Vol. 9147, 91477R
, Proceedings of SPIE, ISSN 0277-786X
Keyword [en]
Ground based infrared instruments, infrared spectrometers, high resolution spectroscopy
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-257491DOI: 10.1117/12.2054381ISI: 000354527800233ISBN: 978-0-8194-9615-7OAI: oai:DiVA.org:uu-257491DiVA: diva2:839571
5th Conference on Ground-Based and Airborne Instrumentation for Astronomy, JUN 22-26, 2014, Montreal, CANADA
Available from: 2015-07-03 Created: 2015-07-02 Last updated: 2015-07-03Bibliographically approved

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Piskunov, NikolaiHeiter, UlrikeLockhart, MatthewMarquart, ThomasStempels, Eric
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