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Title: The Australia telescope search for cosmic microwave background anisotropy
Authors: Subrahmanyan, Ravi
Kesteven, Michael J.
Ekers, R.D.
Sinclair, M.
Silk, Joseph
Issue Date: Aug-1998
Publisher: Blackwell Publishing for the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, 1998, Vol.298, p1189-1197
Abstract: In an attempt to detect cosmic microwave background (CMB) anisotropy on arcmin scales, we have made an 8.7-GHz image of a sky region with a resolution of 2 arcmin and high surface brightness sensitivity using the Australia Telescope Compact Array (ATCA) in an ultracompact configuration. The foreground discrete-source confusion was estimated from observations with higher resolution at the same frequency and in a scaled array at a lower frequency. Following the subtraction of the foreground confusion, the field shows no features in excess of the instrument noise. This limits the CMB anisotropy flat-band power to Q_flat<23.6muK with 95 per cent confidence; the ATCA filter function (which is available at the website F_l in multipole l-space peaks at l_eff=4700 and has half-maximum values at l=3350 and 6050.
Description: Open Access
ISSN: 0035-8711
Alternative Location:
Copyright: (1998) Royal Astronomical Society
Appears in Collections:Research Papers (A&A)

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