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Data processing for exoplanet detection using direct imaging

Published online by Cambridge University Press:  02 May 2006

A. Ferrari ,
M. Carbillet ,
E. Serradel ,
C. Aime  and
R. Soummer
A. Ferrari
Affiliation:
LUAN, Universié de Nice Sophia-Antipolis, 06108 Nice cedex 2, France – email: ferrari@unice.fr, marcel@unice.fr, serradel@unice.fr, aime@unice.fr
M. Carbillet
Affiliation:
LUAN, Universié de Nice Sophia-Antipolis, 06108 Nice cedex 2, France – email: ferrari@unice.fr, marcel@unice.fr, serradel@unice.fr, aime@unice.fr
E. Serradel
Affiliation:
LUAN, Universié de Nice Sophia-Antipolis, 06108 Nice cedex 2, France – email: ferrari@unice.fr, marcel@unice.fr, serradel@unice.fr, aime@unice.fr
C. Aime
Affiliation:
LUAN, Universié de Nice Sophia-Antipolis, 06108 Nice cedex 2, France – email: ferrari@unice.fr, marcel@unice.fr, serradel@unice.fr, aime@unice.fr
R. Soummer
Affiliation:
Department of Astrophysics, American Museum of Natural History, 79th Street at Central Park West, New York, NY 10024, USA – email: soummer@amnh.org
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Abstract

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This communication is devoted to data processing of images obtained using an extreme adaptive optics (AO) system and a coronagraph. Specific attention is given to the following degrading factors: the residuals of atmospheric turbulence after AO correction and the “side” effects of the coronagraph. Relying on a statistical modeling of the measurements a test based on short exposure images is proposed. This processing, which generalizes the dark-speckle technique, takes into account the “local” variance of the complex amplitude residuals and the deterministic response of the system (i.e. without atmospheric turbulence).

Keywords

instrumentation: high angular resolutionmethods: data analysistechniques: high angular resolutiontechniques: image processingstars: planetary systems
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C200: Direct Imaging of Exoplanets: Science & Techniques , October 2005 , pp. 565 - 570
Copyright
© 2006 International Astronomical Union