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6 October 2023 Performance of the active wide-field sky simulator in JPL’s astrometry testbed
Alex B. Walter, Eduardo Bendek, Matthew Noyes
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Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126801I (2023) https://doi.org/10.1117/12.2677677
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States
Abstract
Detecting the astrometric signal of exoplanets is a powerful way to determine its mass, but the small size of the signal presents a challenge. For Earth-like planets around Sun-like stars within 10 pc the signal is expected to be a microarcsecond or less. We developed an astrometry testbed to simulate equivalent signals using an illuminated pinhole array and a flexurized central pinhole with picometer resolution. The active wide-field sky simulator is the critical component in the testbed that simulates the small astrometric signals. We report its performance on measuring and correcting optical aberrations caused by thermal distortions and pointing jitter which are later calibrated by a diffractive pupil.
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Alex B. Walter, Eduardo Bendek, and Matthew Noyes "Performance of the active wide-field sky simulator in JPL’s astrometry testbed", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126801I (6 October 2023); https://doi.org/10.1117/12.2677677
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KEYWORDS
Astrometry
Signal detection
Light sources
Equipment
Exoplanets
Optical aberrations
Optical calibration
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