Challenges in focal plane and telescope calibration for high-precision space astrometry - Institut d'Astrophysique de Paris
Journal Articles Proceedings of SPIE, the International Society for Optical Engineering Year : 2024

Challenges in focal plane and telescope calibration for high-precision space astrometry

Abstract

With sub-microarcsecond angular accuracy, the Theia telescope will be capable of revealing the architectures of nearby exoplanetary systems down to the mass of Earth. This research addresses the challenges inherent in space astrometry missions, focusing on focal plane calibration and telescope optical distortion. We propose to assess the future feasibility of large-format detectors (50 to 200 megapixels) in a controlled laboratory environment. The aim is to improve the architecture of the focal plane while ensuring that specifications are met. The use of field stars as metrological sources for calibrating the optical distortion of the field may help to constrain telescope stability. The paper concludes with an attempt to confirm in the laboratory the performance predicted by simulations. We will also address the possibility of using such techniques with a dedicated instrument for the Habitable World Observatory.
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Origin Files produced by the author(s)
Origin Files produced by the author(s)
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Origin Files produced by the author(s)

Dates and versions

hal-04681289 , version 1 (29-08-2024)

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Fabien Malbet, Manon Lizzana, Fabrice Pancher, Sébastien Soler, Alain Léger, et al.. Challenges in focal plane and telescope calibration for high-precision space astrometry. Proceedings of SPIE, the International Society for Optical Engineering, 2024, 13092, pp.130920B. ⟨10.1117/12.3019233⟩. ⟨hal-04681289⟩
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