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First CoRoT International Symposium – Paris – France

First CoRoT International Symposium – Paris – France. Jitter Photometric Corrections are implemented using the following equation. Jitter. Correction Surface. Motivation. PSF-based method. We need a super-resolved PSF!!!!. How a blurred image is built. PSF Algorithm. We write the:

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First CoRoT International Symposium – Paris – France

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  1. First CoRoT International Symposium – Paris – France

  2. Jitter Photometric Corrections are implemented using the following equation Jitter Correction Surface Motivation PSF-based method We need a super-resolved PSF!!!! EXO PSFs - First CoRoT International Symposium - Paris - Fabio Fialho

  3. How a blurred image is built EXO PSFs - First CoRoT International Symposium - Paris - Fabio Fialho

  4. PSF Algorithm • We write the: • probability density functionp • jitter-dependent kernelM • noise-dependent covariance matrix - Q • We state and solve the optimization problem (recursive gradient method) EXO PSFs - First CoRoT International Symposium - Paris - Fabio Fialho

  5. Validation – Finding CoRoT-Exo-2b Input 1-pixel images White flux before correction White flux after correction Blue flux before correction Blue flux after correction Estimate ½ pixel PSF EXO PSFs - First CoRoT International Symposium - Paris - Fabio Fialho

  6. Conclusions Robustness improvement • Improved robustness compared to the Asteroseismology channel’s algorithm, allowing its use in the Planet Finder channel. • The modeled PSF provides about 8-times gain of SNR for the white photometry (periods of the worst case of jitter noise). Planets detectability threshold increasement EXO PSFs - First CoRoT International Symposium - Paris - Fabio Fialho

  7. Acknowledgements Vanderlei Parro • The quality of these corrections could not be achieved without the work of many other people likeRéza Samadi, Nicolas Lautié, Vincent Lapeyrère, Damien Naudet, Emmanuel Grolleau, Sylviane Chaintreuil, Frederick Heuripeau, Renaud Romagnan, Laurent Jorda, etc… EXO PSFs - First CoRoT International Symposium - Paris - Fabio Fialho

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