NOAO >   Observing Info >   Approved Programs >   2008B-0269

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Proposal Information for 2008B-0269


PI: Christopher J Burke, STScI, cjburke@stsci.edu
Address: Science Division, 3700 San Martin Dr., Baltimore, MD 21218, USA

CoI: Peter McCullough, STScI

Title: Survey of XO-2 for an Earth-sized Planet

Abstract: We propose to survey XO-2, the stellar host to the transiting Hot Jupiter planet XO-2b, for an additional Earth-sized transiting planet using 13 nights on WIYN with OPTIC. These observations will have >90% probability to detect more than two transit events at 4-\sigma each of an Earth-sized planet orbiting at the interior 2:1 resonance with XO-2b. In addition, a full transit and 1-2 partial transits of XO- 2b during the observations will enable accurate (8-4 s) transit timing measurements and refinement of the XO-2b planet properties. Observations at the expected precision will demonstrate the feasibility for ground based detection of Earth-sized transiting planets orbiting close-in to Solar type stars. By testing for the existence of a close- in Earth-sized planet in the XO-2 system, we will constrain the efficiency that material is shepherded interior to inward migrating Jupiter-sized planets and forms additional smaller planets.


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