Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-02-13
Astrophys.J.Suppl.171:61-71,2007
Astronomy and Astrophysics
Astrophysics
23 pages, 7 figures, 2 machine-readable tables available at http://astro.stanford.edu/CRATES/ ; accepted for publication in Ap
Scientific paper
10.1086/513742
We have assembled an 8.4 GHz survey of bright, flat-spectrum (alpha > -0.5) radio sources with nearly uniform extragalactic (|b|>10 deg) coverage for sources brighter than S_{4.8 GHz} = 65 mJy. The catalog is assembled from existing observations (especially CLASS and the Wright et al. PMN-CA survey), augmented by reprocessing of archival VLA and ATCA data and by new observations to fill in coverage gaps. We refer to this program as CRATES, the Combined Radio All-sky Targeted Eight GHz Survey. The resulting catalog provides precise positions, sub-arcsecond structures, and spectral indices for some 11,000 sources. We describe the morphology and spectral index distribution of the sample and comment on the survey's power to select several classes of interesting sources, especially high energy blazars. Comparison of CRATES with other high-frequency surveys also provides unique opportunities for identification of high-power radio sources.
Healey Stephen E.
Murphy Tara
Ricci Roberto
Romani Roger W.
Sadler Elaine M.
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