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

Abstract

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.

5 pages, 5 figures

References in corpus (3)

• Taking the Measure of the Universe: Precision Astrometry with SIM PlanetQuest
• Overview of the SIM PlanetQuest Light (SIM-Lite) mission concept
• Obervational Model for Microarcsecond Astrometry with the Space Interferometry Mission

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