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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1611

Title: Optimum weighting function in bispectral analysis in speckle interferometry - Binary star parity detection
Authors: Karbelkar, S.N.
Keywords: BINARY STARS
SPECKLE INTERFEROMETRY
SPECTRUM ANALYSIS
WEIGHTING FUNCTIONS
ATMOSPHERIC TURBULENCE
IMAGE PROCESSING
SEEING (ASTRONOMY)
SIGNAL TO NOISE RATIOS
Issue Date: Nov-1990
Publisher: Springer-Verlag
Citation: Astronomy and Astrophysics, 1990, Vol.238, p485-493
Abstract: In order to describe the atmospheric turbulence which limits the resolution of long-exposure images obtained using ground-based large telescopes, a simplified model of a speckle pattern, reducing the complexity of calculating field-correlations of very high order, is presented. Focal plane correlations are used instead of correlations in the spatial frequency domain. General tripple correlations for a point source and for a binary are calculated and it is shown that they are not a strong function of the binary separation. For binary separations close to the diffraction limit of the telescope, the genuine triple correlation technique ensures a better SNR than the near-axis Knox-Thompson technique. The simplifications allow a complete analysis of the noise properties at all levels of light.
URI: http://hdl.handle.net/2289/1611
ISSN: 0004-6361
Alternative Location: http://adsabs.harvard.edu/cgi-bin/bib_query?1990A&A...238..485K
Copyright: (1990) by the European Southern Observatory. Scanned images provided by the NASA ADS.
Appears in Collections:Research Papers (A&A)

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