CUBES: the Cassegrain U-band Efficient Spectrograph
Date Issued
2022
Author(s)
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Alencar, S. H. P.
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Balashev, S.
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Bastian, N.
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Barbuy, B.
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Battino, U.
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Calcines, A.
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Cambianica, P.
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Carter, B.
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Castilho, B.
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Christlieb, N.
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Cooke, R. J.
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Cunha, K.
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da Silva, A.
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De Cia, A.
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Dekker, H.
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D'Elia, V.
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de Silva, G.
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Diaz, M. P.
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D'Auria, D.
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Fitzsimmons, A.
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Ernandes, H.
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Evans, C.
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Gänsicke, B.
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Giribaldi, R. E.
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Gneiding, C.
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Hansen, C. J.
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La Forgia, F.
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Lazzarin, M.
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Lunney, D.
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Maciel, W. J.
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Marcolino, W.
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Miller, C.
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Noterdaeme, P.
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Opitom, C.
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Pilecki, B.
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Quirrenbach, A.
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Redaelli, E. M. A.
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Pereira, C.
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Rossi, S.
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Sanchez-Janssen, R.
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Seifert, W.
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Smiljanic, R.
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Snodgrass, C.
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Stilz, I.
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Stürmer, J.
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Verducci, O.
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Waring, C.
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Watson, S.
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Wells, M.
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Wright, D.
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Zafar, T.
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Abstract
In the era of Extremely Large Telescopes, the current generation of 8-10m facilities are likely to remain competitive at ground-UV wavelengths for the foreseeable future. The Cassegrain U-Band Efficient Spectrograph (CUBES) has been designed to provide high-efficiency (> 40%) observations in the near UV (305-400 nm requirement, 300-420 nm goal) at a spectral resolving power of R >20, 000 (with a lower-resolution, sky-limited mode of R ~7, 000). With the design focusing on maximizing the instrument throughput (ensuring a Signal to Noise Ratio (SNR) ~20 per high-resolution element at 313 nm for U ~18.5 mag objects in 1h of observations), it will offer new possibilities in many fields of astrophysics, providing access to key lines of stellar spectra: a tremendous diversity of iron-peak and heavy elements, lighter elements (in particular Beryllium) and light-element molecules (CO, CN, OH), as well as Balmer lines and the Balmer jump (particularly important for young stellar objects). The UV range is also critical in extragalactic studies: the circumgalactic medium of distant galaxies, the contribution of different types of sources to the cosmic UV background, the measurement of H2 and primordial Deuterium in a regime of relatively transparent intergalactic medium, and follow-up of explosive transients. The CUBES project completed a Phase A conceptual design in June 2021 and has now entered the detailed design and construction phase. First science operations are planned for 2028.
Coverage
Ground-based and Airborne Instrumentation for Astronomy IX
All editors
Evans, Christopher J.; Bryant, Julia J.; Motohara, Kentaro
Series
Volume
12184
Start page
121840A
Conferenece
Ground-based and Airborne Instrumentation for Astronomy IX
Conferenece place
Montréal, Québec, Canada
Conferenece date
July 17-23, 2022
Issn Identifier
0277-786X
Ads BibCode
2022SPIE12184E..0AC
Rights
open.access
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