The SARS algorithm: detrending CoRoT light curves with Sysrem using simultaneous external parameters
- Author(s)
- Aviv Ofir, Roi Alonso, Aldo Stefano Bonomo, Ludmila Carone, Stefania Carpano, Benjamin Samuel, Jörg Weingrill, Suzanne Aigrain, Michel Auvergne, Annie Baglin, Pierre Barge, Pascal Borde, Francois Bouchy, Hans J. Deeg, Magali Deleuil, Rudolf Dvorak, Anders Erikson, Sylvio Ferraz Mello, Malcolm Fridlund, Michel Gillon, Tristan Guillot, Artie P. Hatzes, Laurent Jorda, Helmut Lammer, Alain Leger, Antoine Llebaria, Claire Moutou, Marc Ollivier, Martin Pätzold, Didier Queloz, Heike Rauer, Daniel Rouan, Jean Louis Schneider, Günther Wuchterl
- Abstract
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.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Tel Aviv University, Université de Genève, Université de Provence Aix-Marseille I, European Space Agency (ESA), Université Paris XI - Paris-Sud, Österreichische Akademie der Wissenschaften (ÖAW), University of Exeter, Université de recherche Paris Sciences et Lettres, Laboratoire d'Astronomie Spatiale, Université Paris VI - Pierre-et-Marie-Curie, Institute of Astrophysics of the Canary Islands, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Instituto Oceanográfico, Université de Liège, Université Côte d'Azur, Thüringer Landessternwarte Tautenburg, Institute d'Astrophysique Spatiale - IAS, Universität zu Köln
- Journal
- Monthly Notices of the Royal Astronomical Society
- Volume
- 404
- Pages
- 99-103
- No. of pages
- 5
- ISSN
- 0035-8711
- DOI
- https://doi.org/10.1111/j.1745-3933.2010.00843.x
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/24c8ea8b-cb52-4857-a34b-0840af2396c5