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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2009

Removing systematics from the CoRoT light curves. I. Magnitude-dependent zero point

P. Guterman
S. Zucker
  • Fonction : Auteur
N. Grinberg
  • Fonction : Auteur
A. Alapini
  • Fonction : Auteur
François Bouchy
Claire Moutou
R. Sabo
  • Fonction : Auteur

Résumé

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.

Dates et versions

hal-03784931 , version 1 (23-09-2022)

Identifiants

Citer

Tsevi Mazeh, P. Guterman, Suzanne Aigrain, S. Zucker, N. Grinberg, et al.. Removing systematics from the CoRoT light curves. I. Magnitude-dependent zero point. Astronomy and Astrophysics - A&A, 2009, 506, pp.431-434. ⟨10.1051/0004-6361/200912037⟩. ⟨hal-03784931⟩
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