One Centimetre Receiver Array-prototype observations of the CRATES sources at 30 GHz
| Autor: | Richard A. Battye, Katy Lancaster, B. M. Pazderska, E. Pazderski, Michael W. Peel, Boudewijn F. Roukema, A. J. Kus, Marcin P. Gawronski, Ian Browne, Mark Birkinshaw, R. J. Davis, R. Feiler, S. R. Lowe, Peter N. Wilkinson |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
education.field_of_study Astrophysics::High Energy Astrophysical Phenomena Cosmic microwave background Population Astrophysics::Instrumentation and Methods for Astrophysics Flux Spectral density Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Low frequency law.invention Telescope symbols.namesake Space and Planetary Science law symbols Planck education Remote sensing Fermi Gamma-ray Space Telescope |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 410:2690-2697 |
| ISSN: | 0035-8711 |
| DOI: | 10.1111/j.1365-2966.2010.17640.x |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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