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Communication Dans Un Congrès Année : 2010

GRAVITY: design and performance of the fringe tracker

Résumé

GRAVITY is a second generation instrument for the VLTI. It will combine four telescopes in the K band and perform fringe tracking on stars as faint as 10 magnitude with a lambda/8 accuracy, thus counterbalancing atmospheric piston and UTs longitudinal vibrations, despite flux drop-outs due to residual tip-tilt jitter. To achieve such a performance, new developments have to be tested. We have developed a complete simulator so as to improve algorithms and establish an efficient fringe tracking strategy. In addition, a prototype of the fringe tracker for GRAVITY is being built up in order to demonstrate the results of this simulator. We present here the current status of these developments, achieved by simulating realistic tracking at VLTI.
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Dates et versions

hal-03743398 , version 1 (02-08-2022)

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Élodie Choquet, Frédéric Cassaing, Guy Perrin, Frank Eisenhauer, W. Brandner, et al.. GRAVITY: design and performance of the fringe tracker. Optical and Infrared Interferometry II, Jun 2010, San Diego, California, United States. ⟨10.1117/12.855984⟩. ⟨hal-03743398⟩
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