Removing systematics from the CoRoT light curves: I. Magnitude-Dependent Zero Point

Details Removing systematics from the CoRoT light curves: I. Magnitude-Dependent Zero Point Removing systematics from the CoRoT light curves: I. Magnitude-Dependent Zero Point

2009-07-13

arxiv.org/abs/0907.2237v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

Accepted for publication in Astronomy and Astrophysics

Scientific paper

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.

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