12 September 2012 Estimating visibility amplitudes with the PRIMA fringe trackers
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Abstract
The quality of the tracking performed by the fringe sensor units (FSUs) of PRIMA, the ESO’s dual feed facility for the VLTI, is affected by the angular separation between the two objects being observed simultaneously, the detector integration time (DIT) and the atmospheric observational conditions. We describe the algorithm we developed to compute visibilities from the FSU data and discuss their validity for the study on the angular anisoplanatism measured through the dependence of the visibility amplitudes on the angular separation.
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Nuno Gomes, Christian Schmid, Johannes Sahlmann, Sérge Ménardi, Roberto Abuter, Antoine Mérand, Françoise Delplancke, "Estimating visibility amplitudes with the PRIMA fringe trackers", Proc. SPIE 8445, Optical and Infrared Interferometry III, 844522 (12 September 2012); doi: 10.1117/12.925445; https://doi.org/10.1117/12.925445
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