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Proceedings Paper

The GRAVITY fringe tracker: correlation between optical path residuals and atmospheric parameters
Author(s): S. Lacour; R. Dembet; R. Abuter; P. Fedou; G. Perrin; F. Eisenhauer; K. Perraut; C. Straubmeier; W. Brandner; A. Amorim
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Paper Abstract

After the first year of observations with the GRAVITY fringe tracker, we compute correlations between the optical path residuals and atmospheric and astronomical parameters. The median residuals of the optical path residuals are 180nm on the ATs and 270nm on the UTs. The residuals are uncorrelated with the target magnitudes for Kmag below 5.5 on ATs (9 on UTs). The correlation with the coherence time is however extremely clear, with a drop-off in fringe tracking performance below 3 ms.

Paper Details

Date Published: 9 July 2018
PDF: 4 pages
Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 1070107 (9 July 2018); doi: 10.1117/12.2313004
Show Author Affiliations
S. Lacour, LESIA, Observatoire de Paris, PSL Research Univ., CNRS (France)
Max-Planck-Institut für extraterrestrische Physik (Germany)
R. Dembet, European Southern Observatory (Germany)
R. Abuter, European Southern Observatory (Germany)
P. Fedou, LESIA, Observatoire de Paris, PSL Research Univ., CNRS (France)
G. Perrin, LESIA, Observatoire de Paris, PSL Research Univ., CNRS (France)
F. Eisenhauer, Max-Planck-Institut für extraterrestrische Physik (Germany)
K. Perraut, Univ. Grenoble Alpes, CNRS, IPAG (France)
C. Straubmeier, Univ. zu Köln (Germany)
W. Brandner, Max-Planck-Institut für Astronomie (Germany)
A. Amorim, Univ. de Lisboa (Portugal)


Published in SPIE Proceedings Vol. 10701:
Optical and Infrared Interferometry and Imaging VI
Michelle J. Creech-Eakman; Peter G. Tuthill; Antoine Mérand, Editor(s)

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