Fourth Cambridge Survey

Fourth Cambridge Survey

Astronomical Survey
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Fourth Cambridge Survey

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The Fourth Cambridge Survey (4C) is an astronomical catalogue of celestial radio sources as measured at 178 MHz using the 4C Array. It was published in two parts, in 1965 (for declinations +20 to +40) and 1967 (declinations -7 to + 20 and +40 to +80), by the Radio Astronomy Group of the University of Cambridge. References to entries in this catalogue use the prefix 4C followed by the declination in degrees, followed by a period, and then followed by the source number on that declination strip, e.g. 4C-06.23.

The 4C Array, which used the technique of aperture synthesis, could reliably position sources of less than 2 Jy, to within about 0.35 arcmin in Right ascension and 2.5 arcmin in declination.


Pilkington J D H & Scott P F (1965) Mem RAS vol 69, p183
Gower J F R, Scott P F & Wills D (1967) Mem RAS vol 71, p49

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