Dr. Nir Greenberg

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Removing systematics from the CoRoT light curves

I. Magnitude-dependent zero point

T. Mazeh, P. Guterman, S. Aigrain, S. Zucker, N. Grinberg, A. Alapini, R. Alonso, M. Auvergne, M. Barbieri, P. Barge, P. Bordé, F. Bouchy, H. Deeg, R. De La Reza, M. Deleuil, R. Dvorak, A. Erikson, M. Fridlund, P. Gondoin, L. Jorda, H. Lammer, A. Léger, A. Llebaria, P. Magain, C. Moutou, M. Ollivier, M. Pätzold, F. Pont, D. Queloz, H. Rauer, D. Rouan, R. Sabo, J. Schneider, G. Wuchterl

This paper presents an analysis that searched for systematic effects within the CoRoT exoplanet field light curves. The analysis identified a systematic effect that modified the zero point of most CoRoT exposures as a function of stellar magnitude. We could find this effect only after preparing a set of learning light curves that were relatively free of stellar and instrumental noise. Correcting for this effect, rejecting outliers that appear in almost every exposure, and applying SysRem, reduced the stellar RMS by about 20%, without attenuating transit signals.

Publication language English
Pages 431-434
Journal Astronomy and Astrophysics
Volume 506
Issue number 1
Publication status Published - 01.01.2009

Keywords

Methods: data analysis
Planetary systems
Techniques: photometric

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science
Access to Document
10.1051/0004-6361/200912037
Other files and links
Link to publication in Scopus