TY - JOUR
T1 - Removing systematics from the CoRoT light curves
T2 - I. Magnitude-dependent zero point
AU - Mazeh, T
AU - Guterman, P
AU - Aigrain, Suzanne
AU - Zucker, S
AU - Grinberg, N
AU - Alapini, Aude
AU - Alonso, R
AU - Auvergne, M
AU - Barbieri, M
AU - Barge, P
PY - 2009/10
Y1 - 2009/10
N2 - 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.
AB - 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.
U2 - 10.1051/0004-6361/200912037
DO - 10.1051/0004-6361/200912037
M3 - Article
VL - 506
SP - 431
EP - 434
JO - Astronomy Astrophysics
JF - Astronomy Astrophysics
IS - 1
ER -