The 9C survey at 15 GHz (9C) is an

astronomical catalogue An astronomical catalog or catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. The oldest and largest are star cat ...

generated from the radio observations of the Ninth Cambridge survey at 15 GHz. It was published in 2003 by the

Cavendish Astrophysics Group The Cavendish Astrophysics Group (formerly the Radio Astronomy Group) is based at the Cavendish Laboratory at the University of Cambridge. The group operates all of the telescopes at the Mullard Radio Astronomy Observatory except for the 32m MERLI ...

of the

University of Cambridge , mottoeng = Literal: From here, light and sacred draughts. Non literal: From this place, we gain enlightenment and precious knowledge. , established = , other_name = The Chancellor, Masters and Schola ...

. The catalogue was originally made in order to locate radio sources which were interfering with observations using the

Very Small Array The Very Small Array (VSA) was a 14-element interferometric radio telescope operating between 26 and 36 GHz that is used to study the cosmic microwave background radiation. It was a collaboration between the University of Cambridge, Univers ...

, but the catalogue has also proved useful for other astronomical programs. Sources are labelled 9CJHHMM+DDMM where ''HHMM+DDMM'' are the coordinates in the

J2000 In astronomy, an epoch or reference epoch is a instant, moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the celestial coordinates or orbital elements of a Astronomical object, celestial body, ...

system, e.g. 9CJ1510+4138.

References

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External links

Article describing the 9C survey at 15GHz

Online data access to the 9C survey at 15GHz
9 {{astronomical-catalogue-stub