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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 559122.0, MPI für Astronomie / Publikationen_mpia
GRAVITY: design and performance of the fringe tracker
Authors:Choquet, E.; Cassaing, F.; Perrin, G.; Eisenhauer, F.; Brandner, W.; Straubmeier, C.; Perraut, K.; Gillessen, S.
Publisher:SPIE
Date of Publication (YYYY-MM-DD):2010
Title of Proceedings:Optical and Infrared Interferometry II
Start Page:77341Z-77341Z
End Page:13
Volume (in Series):7734
Name of Conference/Meeting:Optical and Infrared Interferometry II
Audience:Not Specified
Abstract / Description: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.
Comment of the Author/Creator:Date: 2010, July 1, 2010
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2010SPIE.7734E..59C
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