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Image Reconstruction Using Bispectrum Speckle Interferometry: Application and First Results.

Roberto Maria Caloi
UBA – Unione Biellese Astrofili

Image Reconstruction Using Bispectrum Speckle Interferometry: Application and First Results.

Ricostruzione di immagini ad alta risoluzione mediante interferometria speckle a doppio spettro: Applicazione e primi risultati.

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Speckle interferometry yields diffraction-limited information from sequences of atmospherically-degraded short-exposure images. Sophisticated algorithms have been proposed by astronomers to reconstruct the actual image of an object. The reconstructed images allow to measure the relative positions and the magnitude differences of the stars in a multiple star system up to the resolving power of the available instrumentation. Here I report on the main measurements and analysis required to apply one of these techniques, the building block method using the bispectrum. Preliminary results obtained with simulations and using a small telescope are shown.