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

doi:10.1051/0004-6361/200912037

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

Harvard University
Aix Marseille Université
University of Exeter
Tel Aviv University
Observatoire de Paris
Institut d'Astrophysique Spatiale
Observatoire de Haute Provence
Instituto de Astrofísica de Canarias
Ministério da Ciência e Tecnologia
University of Vienna
German Aerospace Center
ESTEC
Austrian Academy of Sciences
University of Liege
University of Cologne
University of Geneva
Technical University of Berlin

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

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.

Original language	English
Pages (from-to)	431-434
Number of pages	4
Journal	Astronomy and Astrophysics
Volume	506
Issue number	1
DOIs	https://doi.org/10.1051/0004-6361/200912037
State	Published - 2009

Funding

Funders	Funder number
Israel SCIENCE FOUNDATION - The Adler Foundation for Space Research	119/07
Ministry of Science, Culture and Sport of Israel for France-Israel collaboration in Astrophysics	3-450
Israel Science Foundation	655/07

Keywords

Methods: data analysis
Planetary systems
Techniques: photometric

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10.1051/0004-6361/200912037

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Mazeh, T., Guterman, P., Aigrain, S., Zucker, S., Grinberg, N., Alapini, A., Alonso, R., Auvergne, M., Barbieri, M., Barge, P., Bordé, P., Bouchy, F., Deeg, H., De La Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., ... Wuchterl, G. (2009). Removing systematics from the CoRoT light curves: I. Magnitude-dependent zero point. Astronomy and Astrophysics, 506(1), 431-434. https://doi.org/10.1051/0004-6361/200912037

@article{a6da851c64294dfcadd617bdb1c7df52,

title = "Removing systematics from the CoRoT light curves: I. Magnitude-dependent zero point",

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 = "Methods: data analysis, Planetary systems, Techniques: photometric",

author = "T. Mazeh and P. Guterman and S. Aigrain and S. Zucker and N. Grinberg and A. Alapini and R. Alonso and M. Auvergne and M. Barbieri and P. Barge and P. Bord{\'e} and F. Bouchy and H. Deeg and \{De La Reza\}, R. and M. Deleuil and R. Dvorak and A. Erikson and M. Fridlund and P. Gondoin and L. Jorda and H. Lammer and A. L{\'e}ger and A. Llebaria and P. Magain and C. Moutou and M. Ollivier and M. P{\"a}tzold and F. Pont and D. Queloz and H. Rauer and D. Rouan and R. Sabo and J. Schneider and G. Wuchterl",

note = "Publisher Copyright: {\textcopyright} 2009 ESO.",

year = "2009",

doi = "10.1051/0004-6361/200912037",

language = "אנגלית",

volume = "506",

pages = "431--434",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

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Mazeh, T, Guterman, P, Aigrain, S, Zucker, S, Grinberg, N, Alapini, A, Alonso, R, Auvergne, M, Barbieri, M, Barge, P, Bordé, P, Bouchy, F, Deeg, H, De La Reza, R, Deleuil, M, Dvorak, R, Erikson, A, Fridlund, M, Gondoin, P, Jorda, L, Lammer, H, Léger, A, Llebaria, A, Magain, P, Moutou, C, Ollivier, M, Pätzold, M, Pont, F, Queloz, D, Rauer, H, Rouan, D, Sabo, R, Schneider, J & Wuchterl, G 2009, 'Removing systematics from the CoRoT light curves: I. Magnitude-dependent zero point', Astronomy and Astrophysics, vol. 506, no. 1, pp. 431-434. https://doi.org/10.1051/0004-6361/200912037

TY - JOUR

T1 - Removing systematics from the CoRoT light curves

T2 - I. Magnitude-dependent zero point

AU - Mazeh, T.

AU - Guterman, P.

AU - Aigrain, S.

AU - Zucker, S.

AU - Grinberg, N.

AU - Alapini, A.

AU - Alonso, R.

AU - Auvergne, M.

AU - Barbieri, M.

AU - Barge, P.

AU - Bordé, P.

AU - Bouchy, F.

AU - Deeg, H.

AU - De La Reza, R.

AU - Deleuil, M.

AU - Dvorak, R.

AU - Erikson, A.

AU - Fridlund, M.

AU - Gondoin, P.

AU - Jorda, L.

AU - Lammer, H.

AU - Léger, A.

AU - Llebaria, A.

AU - Magain, P.

AU - Moutou, C.

AU - Ollivier, M.

AU - Pätzold, M.

AU - Pont, F.

AU - Queloz, D.

AU - Rauer, H.

AU - Rouan, D.

AU - Sabo, R.

AU - Schneider, J.

AU - Wuchterl, G.

PY - 2009

Y1 - 2009

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.

KW - Methods: data analysis

KW - Planetary systems

KW - Techniques: photometric

UR - https://www.scopus.com/pages/publications/84977531122

U2 - 10.1051/0004-6361/200912037

DO - 10.1051/0004-6361/200912037

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:84977531122

SN - 0004-6361

VL - 506

SP - 431

EP - 434

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

ER -

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

Abstract

Funding

Keywords

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