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The GRAVITY fringe tracker: correlation between optical path residuals and atmospheric parameters

MPS-Authors

Lacour,  S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dembet,  R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Abuter,  R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fedou,  P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Perrin,  G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Eisenhauer,  F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Perraut,  K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Straubmeier,  C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Brandner,  W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Amorim,  A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018SPIE10701E..07L
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Citation

Lacour, S., Dembet, R., Abuter, R., Fedou, P., Perrin, G., Eisenhauer, F., et al. (2018). The GRAVITY fringe tracker: correlation between optical path residuals and atmospheric parameters.


Cite as: https://hdl.handle.net/21.11116/0000-0005-CCA6-A
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.