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Abstract: Searches for planetary transits find many astrophysical false positives as aby-product. There are four main types analyzed in the literature: agrazing-incidence eclipsing binary star, an eclipsing binary star with a smallradius companion star, a blend of one or more stars with an unrelated eclipsingbinary star, and a physical triple star system. We present a list of 69astrophysical false positives that had been identified as candidates oftransiting planets of the on-going XO survey. This list may be useful in orderto avoid redundant observation and characterization of these particularcandidates independently identified by other wide-field searches for transitingplanets. The list may be useful for those modeling the yield of the XO surveyand surveys similar to it. Subsequent observations of some of the listed starsmay improve mass-radius relations, especially for low-mass stars. From thecandidates exhibiting eclipses, we report three new spectroscopic double-linebinaries and give mass function estimations for 15 single lined spectroscopicbinaries.



Author: Radosław Poleski, Peter R. McCullough, Jeff A. Valenti, Christopher J. Burke, Pavel Machalek, Kenneth Janes

Source: https://arxiv.org/







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