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Adapted scale image subtraction for achromatic coronography

Published online by Cambridge University Press:  28 May 2003

Claude Aime ,
Rémi Soummer ,
J. Gay ,
J.-P. Rivet  and
Y. Rabbia
J. Gay
Affiliation:
Dept. Fresnel, Observatoire de la Côte d'Azur, BP. 4229, 06304 Nice Cedex 4, France
J.-P. Rivet
Affiliation:
Dept. Cassini, Observatoire de la Côte d'Azur, BP. 4229, 06304 Nice Cedex 4, France
Y. Rabbia
Affiliation:
Dept. Fresnel, Observatoire de la Côte d'Azur, BP. 4229, 06304 Nice Cedex 4, France
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Abstract

The detection of a faint companion to a star with achromatic coronographyand adaptative optics is only limited by the residual speckles.We study a method to increase the detectability of the companion, basedon the difference of two images taken in two different wavelengths, aftersuitable rescaling.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 8: Astronomy with High Contrast Imaging , 2003 , pp. 245 - 257
Copyright
© EAS, EDP Sciences, 2003

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