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Proceedings Paper

Finite-detector effects in speckle imaging
Author(s): Robert W. Johnson; George J. M. Aitken
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Paper Abstract

When astronomical speckle images are truncated by the finite size of the image detector, important errors occur in the estimated power spectrum and the Knox-Thompson cross- spectra. The errors and their effect on image reconstruction are calculated for an 8-component and a 3-component star model. The distortions and negative artifacts seen in the reconstructions of the star ADS 11344 are explained by image truncation. A method of estimating an approximate error bound given the telescope, atmospheric seeing, detector size, and sampling rate is outlined.

Paper Details

Date Published: 29 December 1992
PDF: 12 pages
Proc. SPIE 1767, Inverse Problems in Scattering and Imaging, (29 December 1992); doi: 10.1117/12.139038
Show Author Affiliations
Robert W. Johnson, Queen's Univ. (Canada)
George J. M. Aitken, Queen's Univ. (Canada)


Published in SPIE Proceedings Vol. 1767:
Inverse Problems in Scattering and Imaging
Michael A. Fiddy, Editor(s)

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