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The Signal to Noise Ratio in Speckle Interferometry

Published online by Cambridge University Press:  02 August 2016

J.C. Dainty
Affiliation:
Dept. of Physics, Queen Elizabeth College, Campden Hill Road, London W8 7AH
A.H. Greenaway
Affiliation:
Dept. d'Astrophysique, Universite de Nice, Parc valrose, 06034 Nice, France
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Abstract

Recent theoretical studies of the signal to noise ratio (SNR) of photon limited speckle (image plane) interferometry are reviewed. The SNR of an estimate of the object power spectrum is evaluated for both the single and double aperture cases, for arbitrary light levels. The SNR for the auto-correlation function method of analysis is also given for the low light level case and applied to the special case of binary star observations. The SNRs for the power spectrum and autocorrelation function analyses are compared and a comparison is also made between speckle (image plane) and amplitude (pupil or aperture plane) interferometry. Limiting observable magnitudes are estimated for some relevant cases.

Type
The Scientific Programme
Copyright
Copyright © 1979

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