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2023A&A...671A..24D - Astronomy and Astrophysics, volume 671A24 (2023/3-1)

CRIRES+ on sky at the ESO Very Large Telescope Observing the Universe at infrared wavelengths and high spectral resolution.

DORN R.J., BRISTOW P., SMOKER J.V., RODLER F., LAVAIL A., ACCARDO M., VAN DEN ANCKER M., BAADE D., BARUFFOLO A., COURTNEY-BARRER B., BLANCO L., BRUCALASSI A., CUMANI C., FOLLERT R., HAIMERL A., HATZES A., HAUG M., HEITER U., HINTERSCHUSTER R., HUBIN N., IVES D.J., JUNG Y., JONES M., KAEUFL H.-U., KIRCHBAUER J.-P., KLEIN B., KOCHUKHOV O., KORHONEN H.H., KOHLER J., LIZON J.-L., MOINS C., MOLINA-CONDE I., MARQUART T., NEESER M., OLIVA E., PALLANCA L., PASQUINI L., PAUFIQUE J., PISKUNOV N., REINERS A., SCHNELLER D., SCHMUTZER R., SEEMANN U., SLUMSTRUP D., SMETTE A., STEGMEIER J., STEMPELS E., TORDO S., VALENTI E., VALENZUELA J.J., VERNET J., VINTHER J. and WEHRHAHN A.

Abstract (from CDS):

The CRyogenic InfraRed Echelle Spectrograph (CRIRES) Upgrade project CRIRES+ extended the capabilities of CRIRES. It transformed this VLT instrument into a cross-dispersed spectrograph to increase the wavelength range that is covered simultaneously by up to a factor of ten. In addition, a new detector focal plane array of three Hawaii 2RG detectors with a 5.3 μm cutoff wavelength replaced the existing detectors. Amongst many other improvements, a new spectropolarimetric unit was added and the calibration system has been enhanced. The instrument was installed at the VLT on Unit Telescope 3 at the beginning of 2020 and successfully commissioned and verified for science operations during 2021, partly remotely from Europe due to the COVID-19 pandemic. The instrument was subsequently offered to the community from October 2021 onwards. This article describes the performance and capabilities of the upgraded instrument and presents on sky results.

Abstract Copyright: © The Authors 2023

Journal keyword(s): instrumentation: spectrographs - techniques: radial velocities - instrumentation: polarimeters - techniques: spectroscopic - instrumentation: adaptive optics

Simbad objects: 13

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