Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops
- Author(s)
- P. F. L. Maxted, D. Ehrenreich, T. G. Wilson, Y. Alibert, A. Collier Cameron, S. Hoyer, S. G. Sousa, G. Olofsson, A. Bekkelien, A. Deline, L. Delrez, A. Bonfanti, L. Borsato, R. Alonso, G. Anglada Escudé, D. Barrado, S. C. C. Barros, W. Baumjohann, M. Beck, T. Beck, W. Benz, N. Billot, F. Biondi, X. Bonfils, A. Brandeker, C. Broeg, T. Bárczy, J. Cabrera, S. Charnoz, C. Corral Van Damme, Sz Csizmadia, M. B. Davies, M. Deleuil, O. D. S. Demangeon, B. -O. Demory, A. Erikson, H. G. Florén, A. Fortier, L. Fossati, M. Fridlund, D. Futyan, D. Gandolfi, M. Gillon, M. Guedel, P. Guterman, K. Heng, K. G. Isaak, L. Kiss, J. Laskar, A. Lecavelier des Etangs, M. Lendl, C. Lovis, D. Magrin, V. Nascimbeni, R. Ottensamer, I. Pagano, E. Pallé, G. Peter, G. Piotto, D. Pollacco, F. J. Pozuelos, D. Queloz, R. Ragazzoni, N. Rando, H. Rauer, C. Reimers, I. Ribas, N. C. Santos, G. Scandariato, A. E. Simon, A. M. S. Smith, M. Steller, M. I. Swayne, Gy M. Szabó, D. Ségransan, N. Thomas, S. Udry, V. Van Grootel, N. A. Walton
- Abstract
CHEOPS(CHaracterising ExOPlanet Satellite) is an ESA S-class mission that observes bright stars at high cadence from low-Earth orbit. The main aim of the mission is to characterize exoplanets that transit nearby stars using ultrahigh precision photometry. Here we report the analysis of transits observed by CHEOPS during its Early Science observing programme for four well-known exoplanets: GJ436b, HD106315b, HD97658b and GJ1132b. The analysis is done using pycheops, an open-source software package we have developed to easily and efficiently analyse CHEOPS light curve data using state-of-the-art techniques that are fully described herein. We show that the precision of the transit parameters measured using CHEOPS is comparable to that from larger space telescopes such as Spitzer Space Telescope and Kepler. We use the updated planet parameters from our analysis to derive new constraints on the internal structure of these four exoplanets.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Keele University, Université de Genève, University of St. Andrews, Universität Bern, Aix-Marseille Université, Universidade do Porto, Stockholm University, Université de Liège, Österreichische Akademie der Wissenschaften (ÖAW), Osservatorio Astronomico, Instituto de Astrofísica de Canarias, Universidad de La Laguna, Spanish National Research Council (CSIC), Max-Planck-Institut für extraterrestrische Physik, University of Grenoble Alpes, Admatis Ltd., Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Université de Paris, Science and Operations Department - Science Division (SCI-SC), Lund University, Leiden University, Chalmers University of Technology, Università degli Studi di Torino, National Institute for Earth Sciences & Astronomy (INSU-CNRS), University of Warwick, Hungarian Academy of Sciences, Paris Observatory, Université Paris VI - Pierre-et-Marie-Curie, INAF-Osservatorio Astrofisico di Catania, University of Padova, University of Cambridge, Technische Universität Berlin, Freie Universität Berlin (FU), Eötvös Loránd University Budapest
- Journal
- Monthly Notices of the Royal Astronomical Society
- Volume
- 514
- Pages
- 77–104
- No. of pages
- 28
- ISSN
- 0035-8711
- DOI
- https://doi.org/10.1093/mnras/stab3371
- Publication date
- 07-2022
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics, 103038 Space exploration
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/analysis-of-early-science-observations-with-the-characterising-exoplanets-satellite-cheops-using-pycheops(e2f565a2-42b9-49b5-92fb-3c0b3a81ff1e).html