Preliminary Astrometric Results from Kepler

Details Preliminary Astrometric Results from Kepler Preliminary Astrometric Results from Kepler

2010-01-02

arxiv.org/abs/1001.0305v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

15 pages, 5 figures, submitted to the Astrophysical Journal Letters

Scientific paper

Although not designed as an astrometric instrument, Kepler is expected to produce astrometric results of a quality appropriate to support many of the astrophysical investigations enabled by its photometric results. On the basis of data collected during the first few months of operation, the astrometric precision for a single 30 minute measure appears to be better than 4 milliarcseconds (0.001 pixel). Solutions for stellar parallax and proper motions await more observations, but the analysis of the astrometric residuals from a local solution in the vicinity of a star have already proved to be an important tool in the process of confirming the hypothesis of a planetary transit.

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