tokens: Acknowledgments We thank an anonymous referee for comments that improved this paper. The Australia Telescope Compact Array (ATCA) is part of the Australia Telescope National Facility that is funded by the Australian Government for operation as a National Facility managed by CSIRO. This paper includes archived data obtained through the Australia Telescope Online Archive ( http://atoa.atnf.csiro.au ). This research has made use of the SIMBAD data base (Wenger et al. 2000 ), operated at CDS, Strasbourg, France. This research has made use of the VizieR catalogue (Ochsenbein, Bauer Marcout 2000 ) access tool, CDS, Strasbourg, France.
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