Figure 1.
To investigate flagged matches, catalogue information on source position, shape, and flux density were plotted (a) and, for complicated sources, postage stamp images were obtained and compared (b). In this example of a multiple match, two sub-resolution sources appear present in both the VLSSr and NVSS images, but one is missing from the VLSSr catalogue. The centroid position of the NVSS sources agrees well with the KGS and MRC positions. The flux density of the NVSS sources are combined and the VLSSr source is excluded.

To investigate flagged matches, catalogue information on source position, shape, and flux density were plotted (a) and, for complicated sources, postage stamp images were obtained and compared (b). In this example of a multiple match, two sub-resolution sources appear present in both the VLSSr and NVSS images, but one is missing from the VLSSr catalogue. The centroid position of the NVSS sources agrees well with the KGS and MRC positions. The flux density of the NVSS sources are combined and the VLSSr source is excluded.

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