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

Preprint

13 July 2009

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.0907.2237

Abstract

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.

Keywords

REMOVING SYSTEMATICS
MAGNITUDE DEPENDENT
DEPENDENT ZERO
LIGHT CURVES
FIELD LIGHT
COROT LIGHT
ZERO POINT
OUTLIERS
EXPOSURE

All Related Versions

Version 1, 2009-07-13, ArXiv
Published version: Astronomy & Astrophysics, 506 (1), 431.

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