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| Paper: |
Experimental Tests of the Calibration of High Precision Differential Astrometry for HWO |
| Monograph: |
11, HWO25 Proceedings Part II: Mission Framework, Technology, and Broader Contributions |
| Page: |
335 |
| Authors: |
Manon Lizzana, Fabien Malbet, Alain Leger, Fabrice Pancher, Sébastien Soler, Hugo Rousset, Thierry Lepine, Julien Michelot, Yahya Er-Rahmaouy, and Youssef Bakka |
| DOI: |
10.26624/MLYH1353 |
| Abstract: |
Many different scientific applications require sub-micro arcsecond precision astrometry, including researching rocky exoplanets in the vicinity of the Sun and studying dark matter. The Habitable Worlds Observatory (HWO) is a promising candidate to carry an astrometric instrument because it provides a stable, space-based telescope with a large aperture, which allows faint sources and small displacements to be observed. This paper presents the characterization of an appropriate detector for an astrometric instrument: the 46Mpx Gigapyx from Pyxalis. Moreover it explains the implementation of a testbed enabling interferometric characterization of pixel positions. Finally, the paper introduces a method for calibrating the telescope's optical distortion. This method was implemented in simulation and tested thanks to an optical bench developed at IPAG in France. |
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