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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2005

Comparative blind test of five planetary transit detection algorithms on realistic synthetic light curves

Résumé

Because photometric surveys of exoplanet transits are very promising sources of future discoveries, many algorithms are being developed to detect transit signals in stellar light curves. This paper compares such algorithms for the next generation of space-based transit detection surveys like CoRoT, Kepler, and Eddington. Five independent analyses of a thousand synthetic light curves are presented. The light curves were produced with an end-to-end instrument simulator and include stellar micro-variability and a varied sample of stellar and planetary transits diluted within a much larger set of light curves. The results show that different algorithms perform quite differently, with varying degrees of success in detecting real transits and avoiding false positives. We also find that the detection algorithm alone does not make all the difference, as the way the light curves are filtered and detrended beforehand also has a strong impact on the detection limit and on the false alarm rate. The microvariability of sun-like stars is a limiting factor only in extreme cases, when the fluctuation amplitudes are large and the star is faint. In the majority of cases it does not prevent detection of planetary transits. The most sensitive analysis is performed with periodic box-shaped detection filters. False positives are method-dependent, which should allow reduction of their
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Dates et versions

hal-03784985 , version 1 (30-09-2022)

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Claire Moutou, Frédéric Pont, Pierre Barge, Suzanne Aigrain, Michel Auvergne, et al.. Comparative blind test of five planetary transit detection algorithms on realistic synthetic light curves. Astronomy and Astrophysics - A&A, 2005, 437, pp.355-368. ⟨10.1051/0004-6361:20042334⟩. ⟨hal-03784985⟩
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