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Proceedings Paper • Open Access

Cheops optical calibration campaign
Author(s): Bruno Chazelas; Adrien Deline; F. Wildi; Mirsad Sarajlic; Michaël Sordet; Thibault Kuntzer

Paper Abstract

The ESA S mission CHEOPS relies on a photometer for the precise measurement of the radius of exoplanet. This information is essential to better constrain the nature and structure of exoplanets. The CHEOPS payload is a small defocused telescope of 32-cm aperture that went through its characterization campaign in the first quarter of 2018. We report here on the techniques developed for the calibration campaign and the results of the obtained. In particular we have measured high-precision color-dependent flat fields, measured the characteristics of the detection chain, gain, full-well capacity, read-out noise, measured the instrument distortion and explored the PSF behavior across the field. The end-toend photometric stability of the instrument has also been measured and we will be reporting on the results and the difficulties that have come up while attempting this very difficult measurement, for which sophisticated design and methods were developed.

Paper Details

Date Published: 12 July 2019
PDF: 9 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111802U (12 July 2019); doi: 10.1117/12.2536021
Show Author Affiliations
Bruno Chazelas, Univ. of Geneva (Switzerland)
Adrien Deline, Univ. of Geneva (Switzerland)
F. Wildi, Univ. of Geneva (Switzerland)
Mirsad Sarajlic, Swiss Optics Systems (Switzerland)
Michaël Sordet, Univ. of Geneva (Switzerland)
Thibault Kuntzer, Univ. of Geneva (Switzerland)

Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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