Optimum weighting function in bispectral analysis in speckle interferometry - Binary star parity detection
Data(s) |
01/11/1990
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Resumo |
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. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/34993/1/Weigh.pdf Karbelkar, SN (1990) Optimum weighting function in bispectral analysis in speckle interferometry - Binary star parity detection. In: Astronomy & Astrophysics, 238 (1-2). pp. 485-493. |
Publicador |
EDP Sciences |
Relação |
http://eprints.iisc.ernet.in/34993/ |
Palavras-Chave | #Physics |
Tipo |
Journal Article PeerReviewed |