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Catalogue POP – Notice individuelle de publication

Ofir Aviv, Alonso Roi, Bonomo Aldo Stefano, Carone Ludmila, Carpano Stefania, Samuel Benjamin, Weingrill Jörg, Aigrain Suzanne, Auvergne Michel, Baglin Annie, Barge Pierre, Bordé P., Bouchy François, Deeg Hans J., Deleuil Magali, Dvorak Rudolf, Erikson Anders, Mello Sylvio Ferraz, Fridlund Malcolm C., Gillon Michel, Guillot Tristan, Hatzes Artie P., Jorda Laurent, Lammer Helmut, Léger Alain, Llebaria Antoine, Moutou Claire, Ollivier Marc, Päetzold Martin, Queloz Didier, Rauer Heike, Rouan Daniel, Schneider Jean, Wuchterl Günther

The SARS algorithm: detrending CoRoT light curves with Sysrem using simultaneous external parameters

Monthly notices of the Royal Astronomical Society, 2010, vol. 404, pp. L99-L103

Référence DOI : 10.1111/j.1745-3933.2010.00843.x
Référence ADS : 2010MNRAS.404L..99O

Résumé :

Surveys for exoplanetary transits are usually limited not by photon noise but rather by the amount of red noise in their data. In particular, although the CoRoT space-based survey data are being carefully scrutinized, significant new sources of systematic noises are still being discovered. Recently, a magnitude-dependant systematic effect was discovered in the CoRoT data by Mazeh et al. and a phenomenological correction was proposed. Here we tie the observed effect to a particular type of effect, and in the process generalize the popular Sysrem algorithm to include external parameters in a simultaneous solution with the unknown effects. We show that a post-processing scheme based on this algorithm performs well and indeed allows for the detection of new transit-like signals that were not previously detected.

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