WMAP extragalactic point sources as potential Space VLBI calibrators
نویسندگان
چکیده
منابع مشابه
Statistical properties of extragalactic sources in the New Extragalactic WMAP Point Source (NEWPS) catalogue
We present results on spectral index distributions, number counts, redshift distribution and other general statistical properties of extragalactic point sources in the NEWPS5σ sample (López-Caniego et al. 2007). The flux calibrations at all the WMAP channels have been reassessed both by comparison with ground based observations and through estimates of the effective beam areas. The two methods ...
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Context. The Deep Extragalactic VLBI-Optical Survey (DEVOS) aims at constructing a large sample of compact radio sources up to two orders of magnitude fainter than those studied in other Very Long Baseline Interferometry (VLBI) surveys. Optical identification of the objects is ensured by selecting them from the Sloan Digital Sky Survey (SDSS) list. Aims. While continuing to build up the DEVOS d...
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We have used the MHW2 filter to obtain estimates of the flux densities at the WMAP frequencies of a complete sample of 2491 sources, mostly brighter than 500 mJy at 5 GHz, distributed over the whole sky excluding a strip around the Galactic equator (|b| ≤ 5). After having detected 933 sources at the ≥ 3σ level in the MHW2 filtered maps our New Extragalactic WMAP Point Source (NEWPS)3σ Catalogue...
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We review estimates of small scale fluctuations due to extragalactic point sources in the Planck Surveyor frequency bands. While our undestanding of the spectral and evolutionary properties of these sources is far from complete, conservative estimates allow us to confidently conclude that, in the frequency range 100–200 GHz, their contaminating effect is well below the expected anisotropy level...
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ژورنال
عنوان ژورنال: Advances in Space Research
سال: 2011
ISSN: 0273-1177
DOI: 10.1016/j.asr.2011.03.038