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Proceedings Paper

Design and tests for the correction of atmospheric and instrumental effects on color-differential phase with AMBER/VLTI
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Paper Abstract

The near-infrared instrument AMBER at the VLTI allows, among other interferometric observables, the simultaneous measurement of the phase between various spectral channels. Color-differential phase thus yields spatial and spectral information on unresolved sources, and could lead to such ambitious goals as the spectroscopy of nearby hot, giant exoplanets. This will require, though, an extreme stability on the measurement, which is likely to be affected by chromatic effects at the various stages of the light path. We present how AMBER has been designed to minimize and to calibrate such effects. We give estimates of their contributions from different origins, and present recent measurements of the instrumental stability. We discuss the possibility to supress the residual chromatic effects in post-data treatment in order to reach a precision limited by the photon noise on the differential phase.

Paper Details

Date Published: 20 October 2004
PDF: 11 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.551601
Show Author Affiliations
Martin Vannier, European Southern Observatory (Chile)
Romain Gueorguiev Petrov, Univ. de Nice-Sophia Antipolis (France)
Markus Schoeller, European Southern Observatory (Chile)
Pierre Antonelli, Observatoire de la Cote d'Azur (France)
Yves Bresson, Observatoire de la Cote d'Azur (France)
Gilles Duvert, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Carla S. Gil, European Southern Observatory (Chile)
Andreas Glindemann, European Southern Observatory (Germany)
Stephane Lagarde, Observatoire de la Cote d'Azur (France)
Etienne P. LeCoarer, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Bruno Lopez, Observatoire de la Cote d'Azur (France)
Sebastien Morel, Observatoire de la Cote d'Azur (France)
Fabien Malbet, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Florentin Millour, Observatoire de la Cote d'Azur (France)
Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Karine Rousselet-Perraut, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Fredrik T. Rantakyro, European Southern Observatory (Chile)
Sylvie Robbe-Dubois, Univ. de Nice-Sophia Antipolis (France)


Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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