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Theses

Masques Photométriques et Détection des transits planétaires Dans le cadre de la mission CoRoT

Abstract : The Corot mini-satellite to be launched in 2006 uses the transits method : An exoplanet signs its crossing in front of its star by a short drop in light curve with amplitude smaller than 1 per 1000. The stability and continuity of measurement will be ensured over 150 days for 60.000 stars in order to increase the number of favorable configurations. The aperture photometry integrates each star flux inside a reading mask adapted to all noises, but limited to 250 different shapes for 12.000 targets. I studied methods allowing to lead this reduction keeping low S/N loss. The sorting of random masks appears to be the most efficient.

For detection, I developed a method to raise the contrast of transits by eliminating components of collective effects and of some artifacts. After temporal detection the systematics are identified, even those of unknown origin and weights. Then new detections arise by assessing dispersion around these components.
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https://tel.archives-ouvertes.fr/tel-00419970
Contributor : Pascal Guterman <>
Submitted on : Friday, September 25, 2009 - 5:40:48 PM
Last modification on : Thursday, July 25, 2019 - 4:34:11 PM
Long-term archiving on: : Tuesday, June 15, 2010 - 8:36:48 PM

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  • HAL Id : tel-00419970, version 1

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Pascal Guterman. Masques Photométriques et Détection des transits planétaires Dans le cadre de la mission CoRoT. Traitement du signal et de l'image [eess.SP]. Université Paul Cézanne - Aix-Marseille III, 2005. Français. ⟨tel-00419970⟩

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