Abstract
THE accurate measurement of the positions of radio sources is important for the recognition of optical objects associated with hitherto unidentified sources, and for investigating the physical relationship between regions of radio and optical emission. For the continuation of the latter work, accuracies much better than 1″ arc are becoming necessary. Furthermore, now that radio positions are becoming known with such precision, the possibility arises1 of establishing a new fundamental system of coordinates, particularly applicable to objects of low proper motion.
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SMITH, J. Precise Positions of Twenty-eight Radio Sources. Nature Physical Science 232, 150–152 (1971). https://doi.org/10.1038/physci232150a0
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DOI: https://doi.org/10.1038/physci232150a0
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