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Lunar Occultation of a Radio Source


AT present only a small number of radio sources have been satisfactorily identified with photographic objects. The important task of establishing further identifications faces a serious difficulty because of the uncertainty in the measured positions of the radio sources. This uncertainty usually amounts to several minutes of arc, and it is only for a few intense sources that the error has been reduced to less than one minute of arc.


  1. Link, F., and Neuzil, L., Bull. Astro. Insts. Csl., 5, 112 (1954).

    ADS  Google Scholar 

  2. Elsmore, B., and Whitfield, C. R., Nature, 176, 447 (1955).

    ADS  Article  Google Scholar 

  3. Boischot, A., Blum, E. J., Ginat, M., and le Roux, E., C.R. Acad. Sci., Paris., 242, 1849 (1956).

    Google Scholar 

  4. Rishbeth, H., Austral. J. Phys., 9, 494 (1956).

    ADS  Article  Google Scholar 

  5. Rishbeth, H., and Little, A. G., The Observatory, 77, 897 (1957).

    Google Scholar 

  6. Edge, D. O., Shakeshaft, J. R., McAdam, W. B., Baldwin, J. E., and Archer, S., Mem. Roy. Astro. Soc., 68, 37 (1959).

    ADS  Google Scholar 

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HAZARD, C. Lunar Occultation of a Radio Source. Nature 191, 58 (1961).

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