CUBES, the Cassegrain U-Band Efficient Spectrograph: towards final design review

Matteo Genoni; Hans Dekker; Stefano Covino; Roberto Cirami; Marcello A. Scalera; Lawrence Bissel; Walter Seifert; Ariadna Calcines; Gerardo Avila; Julian Stϋrmer; Christopher Ritz; David Lunney; Chris Miller; Stephen Watson; Chris Waring; Bruno V. Castilho; Marcio V. De Arruda; Orlando Verducci; Igor Coretti; Luca Oggioni; Giorgio Pariani; Edoardo A. M. Redaelli; Matteo D’ Ambrogio; Giorgio Calderone; Matteo Porru; Ingo Stilz; Rodolfo Smiljanic; Guido Cupani; Mariagrazia Franchini; Andrea Scaudo; Vincent Geers; Vincenzo De Caprio; Domenico D' Auria; Mina Sibalic; Cyrielle Opitom; Gabriele Cescutti; Valentina D’ Odorico; Ruben Sanchez-Janssen; Andreas Quirrenbach; Beatriz Barbuy; Stefano Cristiani; Paolo Di Marcantonio

doi:10.1117/12.3018288

18 July 2024 CUBES, the Cassegrain U-Band Efficient Spectrograph: towards final design review

Matteo Genoni, Hans Dekker, Stefano Covino, Roberto Cirami, Marcello A. Scalera, Lawrence Bissel, Walter Seifert, Ariadna Calcines, Gerardo Avila, Julian Stϋrmer, Christopher Ritz, David Lunney, Chris Miller, Stephen Watson, Chris Waring, Bruno V. Castilho, Marcio V. De Arruda, Orlando Verducci, Igor Coretti, Luca Oggioni, Giorgio Pariani, Edoardo A. M. Redaelli, Matteo D’ Ambrogio, Giorgio Calderone, Matteo Porru, Ingo Stilz, Rodolfo Smiljanic, Guido Cupani, Mariagrazia Franchini, Andrea Scaudo, Vincent Geers, Vincenzo De Caprio, Domenico D' Auria, Mina Sibalic, Cyrielle Opitom, Gabriele Cescutti, Valentina D’ Odorico, Ruben Sanchez-Janssen, Andreas Quirrenbach, Beatriz Barbuy, Stefano Cristiani, Paolo Di Marcantonio

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130967T (2024) https://doi.org/10.1117/12.3018288
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

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 instrumental efficiency ( > 37%) 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 spectral resolution element at 313 nm for U ∼ 17.5 mag objects in 1h of observations), it will offer new possibilities in many fields of astrophysics: i) access to key lines of stellar spectra (e.g. lighter elements, in particular Beryllium), extragalactic studies (e.g. circumgalactic medium of distant galaxies, cosmic UV background) and follow-up of explosive transients. We present the CUBES instrument design, currently in Phase-C and approaching the final design review, summarizing the hardware architecture and interfaces between the different subsystems as well as the relevant technical requirements. We describe the optical, mechanical, electrical design of the different subsystems (from the telescope adapter and support structure, through the main opto-mechanical path, including calibration unit, detector devices and cryostat control, main control electronics), detailing peculiar instrument functions like the Active Flexure Compensation (AFC). Furthermore, we outline the AIT/V concept and the main instrument operations giving an overview of its software ecosystem. Installation at the VLT is planned for 2028/2029 and first science operations in late 2029.

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Matteo Genoni, Hans Dekker, Stefano Covino, Roberto Cirami, Marcello A. Scalera, Lawrence Bissel, Walter Seifert, Ariadna Calcines, Gerardo Avila, Julian Stϋrmer, Christopher Ritz, David Lunney, Chris Miller, Stephen Watson, Chris Waring, Bruno V. Castilho, Marcio V. De Arruda, Orlando Verducci, Igor Coretti, Luca Oggioni, Giorgio Pariani, Edoardo A. M. Redaelli, Matteo D’ Ambrogio, Giorgio Calderone, Matteo Porru, Ingo Stilz, Rodolfo Smiljanic, Guido Cupani, Mariagrazia Franchini, Andrea Scaudo, Vincent Geers, Vincenzo De Caprio, Domenico D' Auria, Mina Sibalic, Cyrielle Opitom, Gabriele Cescutti, Valentina D’ Odorico, Ruben Sanchez-Janssen, Andreas Quirrenbach, Beatriz Barbuy, Stefano Cristiani, and Paolo Di Marcantonio "CUBES, the Cassegrain U-Band Efficient Spectrograph: towards final design review", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130967T (18 July 2024); https://doi.org/10.1117/12.3018288

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