ACT-ATCA Study of 148 and 218 GHz Selected Sources

Details ACT-ATCA Study of 148 and 218 GHz Selected Sources ACT-ATCA Study of 148 and 218 GHz Selected Sources

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3501m&link_type=abstract

ATNF proposal C2424, Semester: October, 2010

Computer Science

Active Galactic Nuclei / Quasars, Surveys And Studies Of Distant Galaxies, Atca

Scientific paper

The Atacama Cosmology Telescope (ACT) has mapped 800sq-deg of the Southern sky at 148GHz, 218GHz and 270GHz, in an on-going survey. In a 148GHz study of the best-covered 455sq-deg, 159 extragalactic sources were detected with flux densities of 15-15000mJy. The sample is 98% complete and 99%pure above 20mJy. Among these sources 111 are in the AT20G catalogue. Above 50mJy the 148GHz-selected ACT-AT20G sample is complete and allows an unbiased study of the average spectral behaviour of these sources. We propose to complete this sample to 20mJy by performing observations of the remaining 48 sources at 5-9 and 20GHz. In preparation to a similar ACT-ATCA study at 148 and 218GHz we further propose the follow-up for 10 additional sources only identified at 218GHz. The full observations will take 9h. This study will illuminate the nature of 148-218GHz-selected sources (flat or GHz-peaked AGN and dusty starforming galaxies) and will contribute to understand the source contribution to CMB power spectrum and SZ effect studies.

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