Sub-Microarcsecond Astrometry with SIM-Lite: A Testbed-based Performance Assessment

Details Sub-Microarcsecond Astrometry with SIM-Lite: A Testbed-based Performance Assessment Sub-Microarcsecond Astrometry with SIM-Lite: A Testbed-based Performance Assessment

2008-12-08

arxiv.org/abs/0812.1530v1

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures

Scientific paper

SIM-Lite is an astrometric interferometer being designed for sub-microarcsecond astrometry, with a wide range of applications from searches for Earth-analogs to determining the distribution of dark matter. SIM-Lite measurements can be limited by random and systematic errors, as well as astrophysical noise. In this paper we focus on instrument systematic errors and report results from SIM-Lite's interferometer testbed. We find that, for narrow-angle astrometry such as used for planet finding, the end-of-mission noise floor for SIM-Lite is below 0.035 uas.

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