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Author

S'ebastien Soler

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Open access Aug 2026

Calibrations for high precision differential astrometry onboard Theia and HWO

Future space astrometry missions such as Theia and an astrometric mode of the Habitable Worlds Observatory (HWO) require detector calibration and instrumental characterization at an unprecedented level to achieve sub-micro-arcsecond precision. This work presents three complementary developments addressing these require...

M. Lizzana, Fabien Malbet, H. Rousset et al. · 0 citations
Open access Aug 2026

Pixel-level calibration for space-based high-precision astrometry using Young’s fringes

The detection of Earth-like exoplanets via astrometry necessitates centroiding precision at the 0.3 microarcsec level, thereby imposing stringent constraints on the focal plane geometry of space telescopes. The AGATE focal plane instrument, a proposed component of the NASA Habitable Worlds Observatory (HWO), aims to ac...

Hugo Rousset, É. Thiébaut, Chloé Rey et al. · 0 citations

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