Visibility calibration using single mode fibers in a long-baseline interferometer.

Details Visibility calibration using single mode fibers in a long-baseline interferometer. Visibility calibration using single mode fibers in a long-baseline interferometer.

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esoc...39.1271s&link_type=abstract

2. ESO Conference on High Resolution Imaging by Interferometry, Part II, p. 1271 - 1283

Physics

3

Scientific paper

Single-mode fibers are extremely pure spatial filters. When used between the telescopes and detectors of a long-baseline interferometer, they remove detrimental wavefront aberrations but introduce significant scintillation. The authors show that the resulting fringe visibility (squared) is unbiased, easily calibrated, and highly independent of seeing. The visibility squared estimator is derived and shown to give similar signal-to-noise ratio to the case where fibers are not used. Initial results of fiber tests on the Mark III interferometer are presented.

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