Upgrading CRIRES-VLT to cross-dispersed mode

E. Oliva; A. Hatzes; N. Piskunov; A. Reiners; H. U. Käufl; D. Ferruzzi; A. Tozzi; L. Origlia

doi:10.1117/12.924969

24 September 2012 Upgrading CRIRES-VLT to cross-dispersed mode

E. Oliva, A. Hatzes, N. Piskunov, A. Reiners, H. U. Käufl, D. Ferruzzi, A. Tozzi, L. Origlia

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 84462N (2012) https://doi.org/10.1117/12.924969
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

Citation Download Citation

E. Oliva, A. Hatzes, N. Piskunov, A. Reiners, H. U. Käufl, D. Ferruzzi, A. Tozzi, and L. Origlia "Upgrading CRIRES-VLT to cross-dispersed mode", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84462N (24 September 2012); https://doi.org/10.1117/12.924969

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