One Centimetre Receiver Array-prototype observations of the CRATES sources at 30 GHz

Details One Centimetre Receiver Array-prototype observations of the CRATES sources at 30 GHz One Centimetre Receiver Array-prototype observations of the CRATES sources at 30 GHz

2010-07-29

arxiv.org/abs/1007.5242v2

Monthly Notices of the Royal Astronomical Society, 2011, Volume 410, Issue 4, pp. 2690-2697

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

21 pages (9 pages of text, 12 pages of table), 7 figures. Erratum appended to end (page 20). Accepted by MNRAS. The definitive

Scientific paper

Knowledge of the population of radio sources in the range ~2-200 GHz is important for understanding their effects on measurements of the Cosmic Microwave Background power spectrum. We report measurements of the 30 GHz flux densities of 605 radio sources from the Combined Radio All-sky Targeted Eight-GHz Survey (CRATES), which have been made with the One Centimetre Receiver Array prototype (OCRA-p) on the Torun 32-m telescope. The flux densities of sources that were also observed by WMAP and previous OCRA surveys are in broad agreement with those reported here, however a number of sources display intrinsic variability. We find a good correlation between the 30 GHz and Fermi gamma-ray flux densities for common sources. We examine the radio spectra of all observed sources and report a number of Gigahertz-peaked and inverted spectrum sources. These measurements will be useful for comparison to those from the Low Frequency Instrument of the Planck satellite, which will make some of its most sensitive observations in the region covered here.

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