Scale sensitive deconvolution

Details Scale sensitive deconvolution Scale sensitive deconvolution

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..314..117b&link_type=abstract

Astronomical Data Analysis Software and Systems (ADASS) XIII, Proceedings of the conference held 12-15 October, 2003 in Strasbou

Astronomy and Astrophysics

Astronomy

Scientific paper

Aperture synthesis radio telescopes measure the Fourier transform of the sky brightness distribution. However the Point Spread Function (PSF) of such telescopes has significant and widespread side-lobes, which needs to be deconvolved from the images. Existing deconvolution algorithms can be thought of as decomposing the image into a set of delta functions (scale less basis). This uses more degrees of freedom than necessary and is not optimal for extended emission. In this paper we present an iterative scale sensitive deconvolution algorithm for radio interferometric imaging, which attempts to minimize the degrees of freedom used to represent the signal (spatially correlated pixels).

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