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Successes and challenges of the APP Coronagraph

Published online by Cambridge University Press:  06 January 2014

Matthew A. Kenworthy ,
Sascha Quanz ,
Gilles Otten ,
Tiffany Meshkat ,
Johanan Codona ,
Frans Snik ,
Michael E. Meyer ,
Markus Kasper  and
Julien Girard
Matthew A. Kenworthy
Affiliation:
Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands email: [email protected]
Sascha Quanz
Affiliation:
Institute for Astronomy, ETH Zurich, CH-8093 Zurich, Switzerland
Gilles Otten
Affiliation:
Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands email: [email protected]
Tiffany Meshkat
Affiliation:
Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands email: [email protected]
Johanan Codona
Affiliation:
Steward Observatory, 933 N. Cherry Avenue, Tucson, AZ 85721
Frans Snik
Affiliation:
Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands email: [email protected]
Michael E. Meyer
Affiliation:
Institute for Astronomy, ETH Zurich, CH-8093 Zurich, Switzerland
Markus Kasper
Affiliation:
European Southern Observatory, Garching bei Munchen, Germany
Julien Girard
Affiliation:
European Southern Observatory, Vitacura, Cassilla 19001, Santiago, Chile
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Abstract

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The Apodizing Phase Plate (APP) coronagraph has been used to image the exoplanet β Pictoris b and the protoplanet candidate around HD 100546, and is currently in use in surveys with NaCo at the VLT. Its success is due to its tolerance to tip-tilt pointing errors in current AO systems, which degrade the performance of nearly all other coronagraphs. Currently the sensitivity of the APP is limited by non-common path errors in the science camera systems and by its chromatic behaviour. We present the achromatized Vector APP coronagraph and address how we will measure and minimise non-common path errors with Focal Plane Wavefront Sensing algorithms.

Keywords

instrumentation: high angular resolutionstars: planetary systemsstars: individual (β Pic, HD 100546)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S299: Exploring the Formation and Evolution of Planetary Systems , June 2013 , pp. 40 - 41
Copyright
Copyright © International Astronomical Union 2013 

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