The needle in the haystack: searching for transiting extrasolar planets in CoRoT stellar light curves

Authors

  • S. Grziwa,

    Corresponding author
    1. Rheinisches Institut für Umweltforschung, Abteilung Planetenforschung, an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, Germany
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  • M. Pätzold,

    1. Rheinisches Institut für Umweltforschung, Abteilung Planetenforschung, an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, Germany
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  • L. Carone

    1. Rheinisches Institut für Umweltforschung, Abteilung Planetenforschung, an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, Germany
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E-mail: grziwas@uni-koeln.de

ABSTRACT

exotrans is a software package developed by the Department of Planetary Research of the Rheinisches Institut für Umweltforschung (RIU-PF) at Cologne University for detecting transit signals from extrasolar planets in stellar light curves. exotrans is used very successfully by RIU-PF within the CoRoT mission. The software package uses two different filter algorithms for pre-whitening and noise reduction (harmonic and trend filtering). Three different box-fitting least-squares algorithms (BLS) are applied in order to extract a potential transit signal from the light curves. The performance of each filter-BLS-algorithm combination on real CoRoT data is presented and compared with other methods used by the CoRoT team.

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