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. .
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| - Quarta investigació de Cambridge (ca)
- Fourth Cambridge Survey (en)
- Quarto catalogo di radiosorgenti di Cambridge (it)
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| - Il Quarto catalogo di radiosorgenti di Cambridge (4C) è il quarto di una serie di nove cataloghi di radiosorgenti pubblicati dall'Università di Cambridge a partire dal 1950. (it)
- La quarta investigació de Cambridge (Fourth Cambridge Survey), també anomenada 4C és un catàleg astronòmic de fonts celestes de ràdio tal com es van mesurar a 178 MHz pel . Es va publicar en dues parts, l'any 1965 (declinacions de +20 a +40) i 1967 (declinacions de -7 a +20 i de +40 a +80), pel de la Universitat de Cambridge. Les referències a les entrades en aquest catàleg usen el prefix 4C seguit per la declinació en graus, seguit d'un període i, a continuació, seguit pel nombre de la font en aquesta declinació, per exemple, . (ca)
- 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. . (en)
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| - La quarta investigació de Cambridge (Fourth Cambridge Survey), també anomenada 4C és un catàleg astronòmic de fonts celestes de ràdio tal com es van mesurar a 178 MHz pel . Es va publicar en dues parts, l'any 1965 (declinacions de +20 a +40) i 1967 (declinacions de -7 a +20 i de +40 a +80), pel de la Universitat de Cambridge. Les referències a les entrades en aquest catàleg usen el prefix 4C seguit per la declinació en graus, seguit d'un període i, a continuació, seguit pel nombre de la font en aquesta declinació, per exemple, . La matriu de 4C (4C Array), que utilitza la tècnica de síntesi d'obertura, podria proporcionar una posició fiable de les fonts de menys de 2 , d'aproximadament 0,35 arcmin en ascensió recta i de 2,5 arcmin en declinació. (ca)
- 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. . The 4C Array, which used the technique of aperture synthesis, could reliably position sources with flux densities of around 2 Jy, to within about 0.35 arcmin in Right ascension and 2.5 arcmin in declination. (en)
- Il Quarto catalogo di radiosorgenti di Cambridge (4C) è il quarto di una serie di nove cataloghi di radiosorgenti pubblicati dall'Università di Cambridge a partire dal 1950. (it)
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