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Proceedings Paper

Images From Astronomical Speckle Data: Weighted Shift-and-Add Analysis
Author(s): J. C. Christou; E. K . Hege; J. D. Freeman; E. Ribak
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Paper Abstract

We have applied a variant of the Shift-and-Add algorithm originally developed by Lynds, Worden & Harvey to astronomical speckle interferometric data. A set of impulses corresponding in location and magnitude to the local maxima in each specklegram is generated and used to obtain an average speckle by means of a Wiener-type filter deconvolution procedure. This technique yields diffraction limited images which appear to be self calibrating for seeing effects. Realistic point spread functions have been obtained for a number of telescopes at different wavelengths and results are also presented for the resolved red supergiant Alpha Orionis. The limiting signal-to-noise of the technique as indicated by the results presented here suggests a dynamic range of ~6 stellar magnitudes with no evidence of residual seeing effects.

Paper Details

Date Published: 25 November 1985
PDF: 8 pages
Proc. SPIE 0556, Intl Conf on Speckle, (25 November 1985); doi: 10.1117/12.949548
Show Author Affiliations
J. C. Christou, New Mexico State University (United States)
E. K . Hege, Kitt Peak National Observatory (United States)
J. D. Freeman, University Of Arizona (United States)
E. Ribak, University Of Arizona (United States)

Published in SPIE Proceedings Vol. 0556:
Intl Conf on Speckle
Henri H. Arsenault, Editor(s)

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