A Search for Additional Planets in the Exoplanetary Systems Studied by the NASA EPOXI Mission

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

The EPOCh (Extrasolar Planet Observation and Characterization) component of the NASA EPOXI mission used the HRI camera aboard the Deep Impact spacecraft to observe transiting exoplanet systems from January through August 2008. The majority of these targets were each observed nearly continuously for several weeks at a time. We searched these high-precision time series for additional planets in these systems, which could be revealed either directly through their photometric transits, or indirectly through the variations these second planets induce on the times of transit of the previously known planet. We present upper limits on putative additional planets in six of the systems observed by EPOXI: HAT-P-4, TrES-3, GJ 436, TrES-2, WASP-3, and HAT-P-7.

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