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Published June 1, 1975 | Published
Journal Article Open

The ₅C₅ Survey of Radio Sources


The ₅C₅ survey, made with the Cambridge One-Mile telescope, covers an area about 4° in diameter at 408 MHz centred at α = 09ʰ40ᵐ,δ = 47∘00′ to a limiting flux density of 8⋅7 × 10⁻²⁹ Wm⁻² Hz⁻¹ at the centre, and a concentric area of diameter about 1° at 1407 MHz to a limiting flux density of 1⋅8×10−29Wm−2Hz−1⁠. The positions and flux densities of 230 sources observed at 408 MHz, and of 52 observed at I407 MHz, are listed in Table I, with suggested optical identifications for some of the sources. The flux density and spectral index distributions are similar to those of the earlier ₅C surveys and there is no evidence for significant anisotropy in either distribution. New observations of some ₅C I sources included in the ₅C₅ survey show that the flux densities measured in ₅C I were in error.

Additional Information

© 1975 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. (Received 1975 January 27; in original form 1974 December 20) I thank the many members of the Mullard Radio Astronomy Observatory who have been involved in the running of the One-Mile telescope and in the analysis of the observations described here, in particular Dr G. G. Pooley. I am grateful to the referee for helpful comments. Mr A. R. Gillespie kindly allowed me to use his results before publication. I am indebted to the Science Research Council for a Research Studentship.

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