CHEOPS in-flight performance

Autor(en)

A. Fortier, A. E. Simon, C. Broeg, G. Olofsson, A. Deline, T. G. Wilson, P. F.L. Maxted, A. Brandeker, A. Collier Cameron, M. Beck, A. Bekkelien, N. Billot, A. Bonfanti, G. Bruno, J. Cabrera, L. Delrez, B. O. Demory, D. Futyan, H. G. Florén, M. N. Günther, A. Heitzmann, S. Hoyer, K. G. Isaak, S. G. Sousa, M. Stalport, A. Turin, P. Verhoeve, B. Akinsanmi, Y. Alibert, R. Alonso, D. Bánhidi, T. Bárczy, D. Barrado, S. C.C. Barros, W. Baumjohann, T. Baycroft, T. Beck, W. Benz, B. I. Bíró, A. Bódi, X. Bonfils, L. Borsato, S. Charnoz, B. Cseh, Sz Csizmadia, I. Csányi, P. E. Cubillos, M. B. Davies, Y. T. Davis, M. Deleuil, O. D.S. Demangeon, A. Derekas, G. Dransfield, E. Ducrot, D. Ehrenreich, A. Erikson, C. Fariña, L. Fossati, M. Fridlund, D. Gandolfi, Z. Garai, L. Garcia, M. Gillon, Y. Gómez Maqueo Chew, M. A. Gómez-Muñoz, V. Granata, M. Güdel, P. Guterman, T. Hegedüs, Ch Helling, E. Jehin, Cs Kalup, D. Kilkenny, L. L. Kiss, L. Kriskovics, K. W.F. Lam, J. Laskar, A. Lecavelier Des Etangs, M. Lendl, A. Lopez Pina, A. Luntzer, D. Magrin, N. J. Miller, D. Modrego Contreras, C. Mordasini, M. Munari, C. A. Murray, V. Nascimbeni, H. Ottacher, R. Ottensamer, I. Pagano, A. Pál, E. Pallé, A. Pasetti, P. P. Pedersen, G. Peter, R. Petrucci, G. Piotto, A. Pizarro-Rubio, D. Pollacco, T. Pribulla, D. Queloz, R. Ragazzoni, N. Rando, H. Rauer, I. Ribas, L. Sabin, N. C. Santos, G. Scandariato, N. Schanche, U. Schroffenegger, O. J. Scutt, D. Sebastian, D. Ségransan, B. Seli, A. M.S. Smith, R. Southworth, M. R. Standing, Gy M. Szabó, R. Szakáts, N. Thomas, M. Timmermans, A. H.M.J. Triaud, S. Udry, V. Van Grootel, J. Venturini, E. Villaver, J. Vinkó, N. A. Walton, R. Wells, D. Wolter

Abstrakt

Context. Since the discovery of the first exoplanet almost three decades ago, the number of known exoplanets has increased dramatically. By beginning of the 2000s it was clear that dedicated facilities to advance our studies in this field were needed. The CHaracterising ExOPlanet Satellite (CHEOPS) is a space telescope specifically designed to monitor transiting exoplanets orbiting bright stars. In September 2023, CHEOPS completed its nominal mission duration of 3.5 yr and remains in excellent operational conditions. As a testament to this, the mission has been extended until the end of 2026. Aims. Scientific and instrumental data have been collected throughout in-orbit commissioning and nominal operations, enabling a comprehensive analysis of the missiona's performance. In this article, we present the results of this analysis with a twofold goal. First, we aim to inform the scientific community about the present status of the mission and what can be expected as the instrument ages. Secondly, we intend for this publication to serve as a legacy document for future missions, providing insights and lessons learned from the successful operation of CHEOPS. Methods. To evaluate the instrument performance in flight, we developed a comprehensive monitoring and characterisation (M&C) programme. It consists of dedicated observations that allow us to characterise the instrumenta's response and continuously monitor its behaviour. In addition to the standard collection of nominal science and housekeeping data, these observations provide valuable input for detecting, modelling, and correcting instrument systematics, discovering and addressing anomalies, and comparing the instrumenta's actual performance with expectations. Results. The precision of the CHEOPS measurements has enabled the mission objectives to be met and exceeded. The satellitea's performance remains stable and reliable, ensuring accurate data collection throughout its operational life. Careful modelling of the instrumental systematics allows the data quality to be significantly improved during the light curve analysis phase, resulting in more precise scientific measurements. Conclusions. CHEOPS is compliant with the driving scientific requirements of the mission. Although visible, the ageing of the instrument has not affected the missiona's performance. The satellitea's capabilities remain robust, and we are confident that we will continue to acquire high-quality data during the mission extension.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Universität Bern, Stockholm University, Universität Genf, University of Warwick, Keele University, University of St. Andrews, Österreichische Akademie der Wissenschaften (ÖAW), INAF-Osservatorio Astrofisico di Catania, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Université de Liège, European Space Research & Technology Centre (ESA/ESTEC), Aix-Marseille Université, Universidade do Porto, Instituto de Astrofísica de Canarias (IAC), Universidad de La Laguna, Baja Astronomical Observatory, Admatis, European Space Astronomy Centre (ESA), University of Birmingham, MTA Társadalomtudományi Kutatóközpont, Magyar Tudományos Akadémia, Université Grenoble-Alpes, INAF - Osservatorio Astronomico di Padova, Université de Paris, INAF-Osservatorio Astrofisico di Torino, Lund University, Eötvös Loránd University Budapest, HUN-REN Magyar Kutatási Hálózat, Université Paris Saclay, Isaac Newton Group of Telescopes, Leiden University, Chalmers University of Technology, Università degli Studi di Torino, Slovenian Academy of Sciences and Arts, Universidad Nacional Autonoma de Mexico, Università degli Studi di Padova, National Institute for Earth Sciences & Astronomy (INSU-CNRS), Technische Universität Graz, University of the Western Cape (UWC), Université de recherche Paris Sciences et Lettres, Université Paris VI - Pierre-et-Marie-Curie, Airbus Defence and Space, Polish Academy of Sciences (PAS), Instituto Nacional de Técnica Aeroespacial, University of Colorado, Boulder, HTC High-Tech-Center AG, University of Cambridge, Eidgenössische Technische Hochschule Zürich, Observatorio Astronómico de Córdoba, Universidad Nacional de Jujuy, Technische Universität Berlin, Freie Universität Berlin (FU), Spanish National Research Council (CSIC), Institut d'Estudis Espacials de Catalunya (IEEC), University of Maryland, College Park, National Aeronautics & Space Administration (NASA), Open University, University of Szeged

Journal

Astronomy and Astrophysics

Band

687

Anzahl der Seiten

43

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/202348576

Publikationsdatum

07-2024

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik, 103038 Weltraumforschung

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/eaf18bab-f6cf-4cfd-b0f3-77ba157ee5b2