Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-06-28
Astron.Astrophys. 425 (2004) 1161-1174
Astronomy and Astrophysics
Astrophysics
Accepted for publication in Astronomy & Astrophysics, 17 pages, 19 figures
Scientific paper
10.1051/0004-6361:20034562
The interferometric data processing methods that we describe in this paper use a number of innovative techniques. In particular, the implementation of the wavelet transform allows us to obtain a good immunity of the fringe processing to false detections and large amplitude perturbations by the atmospheric piston effect, through a careful, automated selection of the interferograms. To demonstrate the data reduction procedure, we describe the processing and calibration of a sample of stellar data from the VINCI beam combiner. Starting from the raw data, we derive the angular diameter of the dwarf star Alpha Cen A. Although these methods have been developed specifically for VINCI, they are easily applicable to other single-mode beam combiners, and to spectrally dispersed fringes.
Coudé du Foresto Vincent
Kervella Pierre
Segransan Damien
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