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Proceedings Paper

Fringe-tracking experiments at the IOTA interferometer
Author(s): Sebastien Morel; Wesley A. Traub; Jesse D. Bregman; Robert W. Mah; Edward Wilson
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Paper Abstract

The first tests of an infrared fringe-tracker prototype for the IOTA interferometer (Mount-Hopkins, Arizona) were carried out during 1999. The aim of this real-time system is to minimize the optical path difference (OPD) fluctuations between the two beams such that interference fringes (obtained in J, K, or L band) can always be observed within the `scan window' given by the instrument. After an introduction of the employed technology (hardware and software), we present results obtained from star observations. Finally, we discuss the possibility of improving the fringe-tracker by prediction of the OPD, using statistical properties of its fluctuations. The improvement of the fringe-tracker already existing for the FLUOR recombiner is discussed as well.

Paper Details

Date Published: 5 July 2000
PDF: 8 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390247
Show Author Affiliations
Sebastien Morel, Smithsonian Astrophysical Observatory (Germany)
Wesley A. Traub, Smithsonian Astrophysical Observatory (United States)
Jesse D. Bregman, NASA Ames Research Ctr. (United States)
Robert W. Mah, NASA Ames Research Ctr. (United States)
Edward Wilson, NASA Ames Research Ctr. (United States)


Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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