Abstract
Abstract We present a simple, standalone implementation of a “centroid test” for NASA’s Kepler, K2, and TESS missions. This test identifies significant changes in the centroid of a star during a transit or eclipse. A significant centroid shift can be used as evidence that a transiting signal is a “false positive”, due to a background eclipsing source. This test produces a likelihood of a significant centroid offset during transit, and the spacial limit to which a contaminating object can be ruled out by the data. The tool to perform this test is packaged in vetting, a pip installable, open source Python package. In this note we discuss the procedure for creating a centroid test.
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