Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...200..312w&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 200, no. 1-2, July 1988, p. 312-322. Research supported by ZWO.
Astronomy and Astrophysics
Astrophysics
50
Angular Resolution, Image Processing, Interferometry, Convolution Integrals, Data Smoothing, Fourier Transformation, Radio Interferometers
Scientific paper
A modification of the CLEAN algorithm is described which alleviates the difficulties occurring in CLEAN for extended sources. This is accomplished by appropriately combining the results of a number of conventional CLEAN operations with optimized parameters, each done at a different resolution. This algorithm can properly be called "Multi-Resolution CLEAN" or "MRC". Experiments on model sources show that this deconvolution method works well even when the source is so large that the usual CLEAN becomes impractical. Further, for observations of extended sources, MRC enhances the signal-to-noise ratio, resulting in an easier definition of the area of signal. Moreover, MRC is in principle faster than a standard CLEAN because less δ-functions are needed.
Schwarz Ulrich J.
Wakker Bart P.
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