Fourth Cambridge Survey

Infobox Astronomical survey
name = 4C


caption =
organization = Radio Astronomy Group, University of Cambridge
alt_names =
wavelength = 178 MHz radio
source = 4C Array, Mullard Radio Astronomy Observatory
goals = Deep survey of radio sources
products = 4C Catalogue
website = [http://cdsweb.u-strasbg.fr/viz-bin/Cat?VIII/4 Fourth Cambridge Survey]

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.

References

: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

External links

* [http://cdsweb.u-strasbg.fr/viz-bin/Cat?VIII/4 The Fourth Cambridge Survey] on the internet.

ee also

** 3CR