Rate and nature of false positives in the CoRoT exoplanet search

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Rate and nature of false positives in the CoRoT exoplanet search

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dc.contributor.author Almenara, J.-M. en_GB
dc.contributor.author Deeg, H. J. en_GB
dc.contributor.author Aigrain, Suzanne en_GB
dc.contributor.author Alonso, R. en_GB
dc.contributor.author Auvergne, M. en_GB
dc.contributor.author Baglin, A. en_GB
dc.contributor.author Barbieri, M. en_GB
dc.contributor.author Barge, P. en_GB
dc.contributor.author Bordé, P. en_GB
dc.contributor.author Bouchy, F. en_GB
dc.contributor.author Bruntt, H. en_GB
dc.contributor.author Cabrera, J. en_GB
dc.contributor.author Carone, L. en_GB
dc.contributor.author Carpano, S. en_GB
dc.contributor.author Catala, C. en_GB
dc.contributor.author Csizmadia, Sz. en_GB
dc.contributor.author De la Reza, R. en_GB
dc.contributor.author Deleuil, M. en_GB
dc.contributor.author Dvorak, R. en_GB
dc.contributor.author Erikson, A. en_GB
dc.contributor.author Fridlund, M. en_GB
dc.contributor.author Gandolfi, D. en_GB
dc.contributor.author Gillon, M. en_GB
dc.contributor.author Gondoin, P. en_GB
dc.contributor.author Guenther, E. W. en_GB
dc.contributor.author Guillot, T. en_GB
dc.contributor.author Hatzes, A. en_GB
dc.contributor.author Hébrard, G. en_GB
dc.contributor.author Jorda, L. en_GB
dc.contributor.author Lammer, H. en_GB
dc.contributor.author Léger, A. en_GB
dc.contributor.author Llebaria, A. en_GB
dc.contributor.author Loeillet, B. en_GB
dc.contributor.author Magain, P. en_GB
dc.contributor.author Mayor, M. en_GB
dc.contributor.author Mazeh, T. en_GB
dc.contributor.author Moutou, C. en_GB
dc.contributor.author Ollivier, M. en_GB
dc.contributor.author Pätzold, M. en_GB
dc.contributor.author Pont, F. en_GB
dc.contributor.author Queloz, D. en_GB
dc.contributor.author Rauer, H. en_GB
dc.contributor.author Régulo, C. en_GB
dc.contributor.author Renner, S. en_GB
dc.contributor.author Rouan, D. en_GB
dc.contributor.author Samuel, B. en_GB
dc.contributor.author Schneider, J. en_GB
dc.contributor.author Shporer, A. en_GB
dc.contributor.author Wuchterl, G. en_GB
dc.contributor.author Zucker, S. en_GB
dc.date.accessioned 2009-11-30T16:44:32Z en_GB
dc.date.accessioned 2011-01-25T11:53:53Z en_US
dc.date.accessioned 2013-03-20T13:22:35Z
dc.date.issued 2009 en_GB
dc.description.abstract Context. The CoRoT satellite searches for planets by applying the transit method, monitoring up to 12,000 stars in the galactic plane for 150 days in each observing run. This search is contaminated by a large fraction of false positives, caused by different eclipsing binary configurations that might be confused with a transiting planet. Aims. We evaluate the rates and nature of false positives in the CoRoT exoplanets search and compare our results with semiempirical predictions. Methods. We consider the detected binary and planet candidates in the first three extended CoRoT runs, and classify the results of the follow-up observations completed to verify their planetary nature. We group the follow-up results into undiluted binaries, diluted binaries, and planets and compare their abundances with predictions from the literature. Results. 83% of the initial detections are classified as false positives using only the CoRoT light-curves, the remaining 17% require follow-up observations. Finally, 12% of the candidates in the follow-up program are planets. The shape of the overall distribution of the false positive rate follows previous predictions, except for candidates with transit depths below about 0.4%. For candidates with transit depths in the range from 0.1–0.4%, CoRoT detections are nearly complete, and this difference from predictions is probably real and dominated by a lower than expected abundance of diluted eclipsing binaries. en_GB
dc.identifier.citation 506 (1), pp. 337-341 en_GB
dc.identifier.doi 10.1051/0004-6361/200911926 en_GB
dc.identifier.uri http://hdl.handle.net/10036/87135 en_GB
dc.language.iso en en_GB
dc.publisher EDP Sciences en_GB
dc.relation.url http://dx.doi.org/10.1051/0004-6361/200911926 en_GB
dc.subject photometric techniques en_GB
dc.subject planetary systems en_GB
dc.title Rate and nature of false positives in the CoRoT exoplanet search en_GB
dc.type Article en_GB
dc.date.available 2009-11-30T16:44:32Z en_GB
dc.date.available 2011-01-25T11:53:53Z en_US
dc.date.available 2013-03-20T13:22:35Z
dc.identifier.issn 0004-6361 en_GB
dc.identifier.issn 1432-0746 en_GB
dc.description Copyright © The European Southern Observatory (ESO) en_GB
dc.identifier.journal Astronomy and Astrophysics en_GB


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