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Limiting magnitude for Dome C optical interferometers

Published online by Cambridge University Press:  02 May 2006

T. Elhalkouj ,
R. G. Petrov ,
M. Lazrek  and
Z. Benkhaldoun
T. Elhalkouj
Affiliation:
Universitée Cady-Ayyad, Faculté des sciences, LPHEA, Marrakech, Maroc
R. G. Petrov
Affiliation:
Université de Nice Sophia-Antipolis, UMR 6525, Parc Valrose, 06108 Nice, France
M. Lazrek
Affiliation:
Universitée Cady-Ayyad, Faculté des sciences, LPHEA, Marrakech, Maroc
Z. Benkhaldoun
Affiliation:
Universitée Cady-Ayyad, Faculté des sciences, LPHEA, Marrakech, Maroc
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Abstract

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This paper discusses the potential performances of interferometers at the Dome C site in the Antarctic. The work is focussed on the limiting performances for fringe tracking, considering different fringe trackers architectures. The fringe tracking limiting magnitude is combined with estimates of the isopistonic angle at Dome C to evaluate the possibilities of off axis fringe tracking. The first evaluations presented here indicate that the sky coverage with realistic off axis fringe tracking is quite high at Dome C even with modest individual apertures and this could finally the best and decisive advantage of this site for optical interferometry. This might make a Dome C interferometer an unique deep sky very high angular resolution machine.

Keywords

instrumentation: interferometersatmospheric effectssite testing
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C200: Direct Imaging of Exoplanets: Science & Techniques , October 2005 , pp. 313 - 316
Copyright
© 2006 International Astronomical Union