Finite-detector effects in speckle imaging

Details Finite-detector effects in speckle imaging Finite-detector effects in speckle imaging

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1767..431j&link_type=abstract

Proc. SPIE Vol. 1767, p. 431-442, Inverse Problems in Scattering and Imaging, Michael A. Fiddy; Ed.

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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