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29 August 2022 GRAVITY+ Astrometry: pushing micro-arcsecond precision with long baseline interferometry
Guillaume Bourdarot, Felix Widmann, Frank Eisenhauer, Sebastiano von Fellenberg, Stefan Gillessen, GRAVITY+ Collaboration
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Proceedings Volume 12183, Optical and Infrared Interferometry and Imaging VIII; 121830S (2022) https://doi.org/10.1117/12.2628785
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada
Abstract
The unique astrometric capability of GRAVITY has already resulted in a serie of transformational results, from the study of the Galactic Center to the characterization of exoplanets. Nonetheless, these breakthroughs have not yet reached the ultimate noise limits of interferometric astrometry, and are currently limited by the systematics of the instrument. As part of the GRAVITY+ project, a major goal is to keep pushing the performances down to the precision of 10-30µas. In this talk, we present the on-going analysis of the precision limits of GRAVITY astrometry, and the potential solutions envisioned to overcome its systematics.
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Guillaume Bourdarot, Felix Widmann, Frank Eisenhauer, Sebastiano von Fellenberg, Stefan Gillessen, and GRAVITY+ Collaboration "GRAVITY+ Astrometry: pushing micro-arcsecond precision with long baseline interferometry", Proc. SPIE 12183, Optical and Infrared Interferometry and Imaging VIII, 121830S (29 August 2022); https://doi.org/10.1117/12.2628785
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KEYWORDS
Interferometry
Exoplanets
Fiber couplers
Infrared radiation
Metrology
Polarization
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