Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...288..675m&link_type=abstract
Astronomy and Astrophysics 288, 675-682 (1994)
Astronomy and Astrophysics
Astrophysics
28
Techniques: Interferometric, Methods: Data Analysis, Atmospheric Effects
Scientific paper
A long-baseline Michelson interferometer samples the Fourier transform of the brightness distribution of a source through measurements of fringe visibilities. The most fundamental problem in processing interferometric data is the derivation of a visibility estimate which is independent of the effects of atmospheric turbulence. This is an important problem for optical observations, most notably for large apertures in a multi-speckle mode, as is the case with the Grand Interferometre a 2 Telescopes (GI2T). Here we describe a new estimator of the visibility amplitude, which is insensitive to the seeing conditions and the exposure time. The theory is presented along with numerical simulations, and the new estimator is used to analyse data collected with the GI2T on α Lyrae and τ Cygni.
Bonneau Damien
Morand F.
Mourard Denis
Rigal Florence
Stee Philippe
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