9 August 2016 The "+" for CRIRES: enabling better science at infrared wavelength and high spectral resolution at the ESO VLT
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Abstract
The adaptive optics (AO) assisted CRIRES instrument is an IR (0.92 - 5.2 μm) high-resolution spectrograph was in operation from 2006 to 2014 at the Very Large Telescope (VLT) observatory. CRIRES was a unique instrument, accessing a parameter space (wavelength range and spectral resolution) up to now largely uncharted. It consisted of a single-order spectrograph providing long-slit (40 arcsecond) spectroscopy with a resolving power up to R=100 000. However the setup was limited to a narrow, single-shot, spectral range of about 1/70 of the central wavelength, resulting in low observing efficiency for many scientific programmes requiring a broad spectral coverage. The CRIRES upgrade project, CRIRES+, transforms this VLT instrument into a cross-dispersed spectrograph to increase the simultaneously covered wavelength range by a factor of ten. A new and larger detector focal plane array of three Hawaii 2RG detectors with 5.3 μm cut-off wavelength will replace the existing detectors. For advanced wavelength calibration, custom-made absorption gas cells and an etalon system will be added. A spectro-polarimetric unit will allow the recording of circular and linear polarized spectra. This upgrade will be supported by dedicated data reduction software allowing the community to take full advantage of the new capabilities offered by CRIRES+. CRIRES+ has now entered its assembly and integration phase and will return with all new capabilities by the beginning of 2018 to the Very Large Telescope in Chile. This article will provide the reader with an update of the current status of the instrument as well as the remaining steps until final installation at the Paranal Observatory.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Reinhold J. Dorn, Reinhold J. Dorn, Roman Follert, Roman Follert, Paul Bristow, Paul Bristow, Claudio Cumani, Claudio Cumani, Siegfried Eschbaumer, Siegfried Eschbaumer, Jason Grunhut, Jason Grunhut, Andreas Haimerl, Andreas Haimerl, Artie Hatzes, Artie Hatzes, Ulrike Heiter, Ulrike Heiter, Renate Hinterschuster, Renate Hinterschuster, Derek J. Ives, Derek J. Ives, Yves Jung, Yves Jung, Florian Kerber, Florian Kerber, Barbara Klein, Barbara Klein, Alexis Lavaila, Alexis Lavaila, Jean Louis Lizon, Jean Louis Lizon, Tom Löwinger, Tom Löwinger, Ignacio Molina-Conde, Ignacio Molina-Conde, Belinda Nicholson, Belinda Nicholson, Thomas Marquart, Thomas Marquart, Ernesto Oliva, Ernesto Oliva, Livia Origlia, Livia Origlia, Luca Pasquini, Luca Pasquini, Jérôme Paufique, Jérôme Paufique, Nikolai Piskunov, Nikolai Piskunov, Ansgar Reiners, Ansgar Reiners, Ulf Seemann, Ulf Seemann, Jörg Stegmeier, Jörg Stegmeier, Eric Stempels, Eric Stempels, Sebastien Tordo, Sebastien Tordo, } "The "+" for CRIRES: enabling better science at infrared wavelength and high spectral resolution at the ESO VLT", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99080I (9 August 2016); doi: 10.1117/12.2232837; https://doi.org/10.1117/12.2232837
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