Computer Science
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phdt........14g&link_type=abstract
Proquest Dissertations And Theses 2007. Section 0026, Part 0606 106 pages; [M.Sc. dissertation].Canada: University of Calgary (
Computer Science
Scientific paper
The Arecibo Observatory 305 m radio telescope has been equipped with a seven feed Arecibo L-band Feed Array (ALFA) to convert the telescope into a multi- pixel imaging device. The off-axis nature of the six beams gives rise to asymmetric side-lobe patterns. The construction of an image by using the multi- beam data results in the presence of side-lobe artifacts in the image which are unique for each compact source depending upon the way the telescope scans across it. Removal of these side-lobe artifacts requires accurate models of the seven ALFA beams and a modification of the Högbom CLEAN algorithm. This algorithm has been named multi-beam CLEAN and was developed and implemented using the Galactic ALFA Continuum Transit Survey (GALFACTS) precursor data-set. The results of the implementation were successful and have been used to CLEAN side-lobe artifacts from the precursor images.
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