EDP Sciences
The CoRoT space mission: early results
Free access
Volume 506, Number 1, October IV 2009
The CoRoT space mission: early results
Page(s) 519 - 534
Section Catalogs and data
DOI http://dx.doi.org/10.1051/0004-6361/200911618
Published online 29 April 2009
A&A 506, 519-534 (2009)
DOI: 10.1051/0004-6361/200911618

Automated supervised classification of variable stars in the CoRoT programme

Method and application to the first four exoplanet fields
J. Debosscher1, L. M. Sarro2, M. López3, M. Deleuil4, C. Aerts1, 5, M. Auvergne6, A. Baglin6, F. Baudin7, M. Chadid8, S. Charpinet9, J. Cuypers10, J. De Ridder1, R. Garrido11, A. M. Hubert12, E. Janot-Pacheco13, L. Jorda4, A. Kaiser14, T. Kallinger14, Z. Kollath15, C. Maceroni16, P. Mathias8, E. Michel6, C. Moutou4, C. Neiner12, M. Ollivier7, R. Samadi6, E. Solano3, C. Surace4, B. Vandenbussche1, and W. W. Weiss14

1  Instituut voor Sterrenkunde, Catholic University of Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
    e-mail: jonas@ster.kuleuven.be
2  Dpt. de Inteligencia Artificial , UNED, Juan del Rosal, 16, 28040 Madrid, Spain
3  LAEX-CAB (INTA-CSIC), Postal address.- LAEFF, European Space Astronomy Center (ESAC), PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain
4  LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France
5  Department of Astrophysics, Radboud University Nijmegen, PO Box 9010, 6500 GL Nijmegen, The Netherlands
6  LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon Cedex, France
7  IAS, Université Paris XI, 91405 Orsay, France
8  Observatoire de la Côte d'Azur, Université Nice Sophia-Antipolis, UMR 6525. Parc Valrose, 06108 Nice, France
9  Laboratoire d'Astrophysique de Toulouse-Tarbes, Université de Toulouse, CNRS, 14 Av. E. Belin, 31400 Toulouse, France
10  Royal Observatory of Belgium, Ringlaan 3, 1180 Brussel, Belgium
11  Instituto de Astrofísica de Andalucía-CSIC, Apdo 3004, 18080 Granada, Spain
12  GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 5 place Jules Janssen, 92195 Meudon Cedex, France
13  Universidade de São Paulo, Instituto de Astronomia, Geofísica e Ciências Atmosféricas - IAG, Departamento de Astronomia, Rua do Matão 1226, 05508-900 São Paulo, Brazil
14  Department of Astronomy, University of Vienna, Türkenschanzstrasse 17, 1180 Wien, Austria
15  Konkoly Observatory, 1525 Budapest, PO Box 67., Hungary
16  INAF – Osservatorio Astronomico di Roma via Frascati 33, 00040 Monteporzio C. (RM), Italy

Received 2 January 2009 / Accepted 12 March 2009

Aims. In this work, we describe the pipeline for the fast supervised classification of light curves observed by the CoRoT exoplanet CCDs. We present the classification results obtained for the first four measured fields, which represent a one-year in-orbit operation.
Methods. The basis of the adopted supervised classification methodology has been described in detail in a previous paper, as is its application to the OGLE database. Here, we present the modifications of the algorithms and of the training set to optimize the performance when applied to the CoRoT data.
Results. Classification results are presented for the observed fields IRa01, SRc01, LRc01, and LRa01 of the CoRoT mission. Statistics on the number of variables and the number of objects per class are given and typical light curves of high-probability candidates are shown. We also report on new stellar variability types discovered in the CoRoT data. The full classification results are publicly available.

Key words: stars: variables: general -- stars: binaries: general -- techniques: photometric -- methods: statistical -- methods: data analysis

© ESO 2009