A comparison between the opto-thermo-mechanical model and lab measurements for CHEOPS

Demetrio Magrin; Valentina Viotto; Thomas Beck; Giordano Bruno; Marco Baroni; Andrea Turella; Massimo Marinai; Maria Bergomi; Federico Biondi; Matteo Munari; Luca Marafatto; Jacopo Farinato; Davide Greggio; Marco Dima; Gaetano Scandariato; Isabella Pagano; Roberto Ragazzoni; Martin Rieder; Martin Diego Busch; Daniele Piazza; Timothy Bandy; Christopher Broeg; Andrea Fortier; Eduardo Hernandez; Virginie Cessa; Willy Benz; Giampaolo Piotto; Ester Giannuzzo; Michele Dami; Enrico Battistelli; Mario Salatti; Elisabetta Tommasi; Luigi De Angelis; Atul Deep; Ivan Ngan; Francesco Ratti; Lisa Gambicorti; Nicola Rando

doi:10.1117/12.2313406

12 July 2018 A comparison between the opto-thermo-mechanical model and lab measurements for CHEOPS

Demetrio Magrin, Valentina Viotto, Thomas Beck, Giordano Bruno, Marco Baroni, Andrea Turella, Massimo Marinai, Maria Bergomi, Federico Biondi, Matteo Munari, Luca Marafatto, Jacopo Farinato, Davide Greggio, Marco Dima, Gaetano Scandariato, Isabella Pagano, Roberto Ragazzoni, Martin Rieder, Martin Diego Busch, Daniele Piazza, Timothy Bandy, Christopher Broeg, Andrea Fortier, Eduardo Hernandez, Virginie Cessa, Willy Benz, Giampaolo Piotto, Ester Giannuzzo, Michele Dami, Enrico Battistelli, Mario Salatti, Elisabetta Tommasi, Luigi De Angelis, Atul Deep, Ivan Ngan, Francesco Ratti, Lisa Gambicorti, Nicola Rando

Author Affiliations +

Proceedings Volume 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave; 106983B (2018) https://doi.org/10.1117/12.2313406
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

CHEOPS is the first small class mission adopted by ESA in the framework of the Cosmic Vision 2015-2025. Its launch is foreseen in early 2019. CHEOPS aims to get transits follow-up measurements of already known exo-planets, hosted by near bright stars (V<12). Thanks to its ultra-high precision photometry, CHEOPS science goal is accurately measure the radii of planets in the super-Earth to Neptune mass range (1<Mplanet/MEarth<20). The knowledge of the radius by transit measurements, combined with the determination of planet mass through radial velocity techniques, will allow the determination/refinement of the bulk density for a large number of small planets during the scheduled 3.5 years life mission. The instrument is mainly composed of a 320 mm aperture diameter Ritchey-Chretien telescope and a Back End Optics, delivering a de-focused star image onto the focal plane. In this paper we describe the opto-thermo-mechanical model of the instrument and the measurements obtained during the opto-mechanical integration and alignment phase at Leonardo company premises, highlighting the level of congruence between the predictions and measurements.

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Demetrio Magrin, Valentina Viotto, Thomas Beck, Giordano Bruno, Marco Baroni, Andrea Turella, Massimo Marinai, Maria Bergomi, Federico Biondi, Matteo Munari, Luca Marafatto, Jacopo Farinato, Davide Greggio, Marco Dima, Gaetano Scandariato, Isabella Pagano, Roberto Ragazzoni, Martin Rieder, Martin Diego Busch, Daniele Piazza, Timothy Bandy, Christopher Broeg, Andrea Fortier, Eduardo Hernandez, Virginie Cessa, Willy Benz, Giampaolo Piotto, Ester Giannuzzo, Michele Dami, Enrico Battistelli, Mario Salatti, Elisabetta Tommasi, Luigi De Angelis, Atul Deep, Ivan Ngan, Francesco Ratti, Lisa Gambicorti, and Nicola Rando "A comparison between the opto-thermo-mechanical model and lab measurements for CHEOPS", Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106983B (12 July 2018); https://doi.org/10.1117/12.2313406

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