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Radio-Continuum study of the Nearby Sculptor Group Galaxies. Part 1: NGC 300 at lambda = 20 cm

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arxiv 1203.1688 v2 pith:UZNUBX3G submitted 2012-03-08 astro-ph.CO

Radio-Continuum study of the Nearby Sculptor Group Galaxies. Part 1: NGC 300 at lambda = 20 cm

Timothy J. Galvin , Miroslav D. Filipovi\'c , Evan J. Crawford , Graeme Wong , Jeff L. Payne , Ain De Horta , Graeme L. White , Nick Tothill
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Danica Draskovi\'c Thomas G. Pannuti Caleb K. Grimes Benjamin J. Cahall William C. Millar Seppo Laine
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classification astro-ph.CO
keywords imagesradio-continuumapproachfeaturelambdaangularappearancearchived
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A series of new radio-continuum (lambda=20 cm) mosaic images focused on the NGC 300 galactic system were produced using archived observational data from the VLA and/or ATCA. These new images are both very sensitive (rms=60 microJy) and feature high angular resolution (<10"). The most prominent new feature is the galaxy's extended radio-continuum emission, which does not match its optical appearance. Using these newly created images a number of previously unidentified discrete sources have been discovered. Furthermore, we demonstrate that a joint deconvolution approach to imaging this complete data-set is inferior when compared to an immerge approach.

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