Filling Factor and Signal-to-Noise Ratios in Optical Interferometric Arrays

Details Filling Factor and Signal-to-Noise Ratios in Optical Interferometric Arrays Filling Factor and Signal-to-Noise Ratios in Optical Interferometric Arrays

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pasp..111..990r&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 111, Issue 762, pp. 990-996.

Astronomy and Astrophysics

Astronomy

5

Instrumentation: Interferometers, Telescopes

Scientific paper

Signal-to-noise ratios are derived for an interferometric array of N diffraction-limited optical/IR telescopes with a Fizeau-type beam recombination. We consider two types of objects-extended sources and point sources-and three sources of noise-signal photon noise, sky background noise, and detector noise. We compare the results with that of a filled aperture, and also to that of an incoherent array, each with the same total collecting area. Implications are briefly discussed.

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