Some Observations of Weak Radio Sources with the Cambridge One-Mile Telescope

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Abstract
The paper describes observations of very weak radio sources made with the one-mile radio telescope in an area of sky centred on α = 09 h 40 m , δ = 50°. The main observations, on 408 Mc/s, covered an area approximately 4° in diameter, and allowed the detection of sources having a flux density S408 ≥ 25 × 10 −29 w.m −2 (c/s) −1 , a value about 1/40 of that of the weakest sources in the 4C survey; the positions of these sources could be established with an accuracy of about 5″ arc in each coordinate. A few sources were also observed on 1407 Mc/s, with an accuracy of 1″.5 arc. A number of the sources could be resolved and contour maps of some of the extended and multiple sources are presented. A search for optical objects in the positions of all the sources has been made using the prints of the 48″ Sky Survey, and several probable identifications have been made.

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