Title:	The Australia telescope search for cosmic microwave background anisotropy
Authors:	Subrahmanyan, Ravi Kesteven, Michael J. Ekers, R.D. Sinclair, M. Silk, Joseph
Keywords:	TECHNIQUES: INTERFEROMETRIC, COSMIC MICROWAVE BACKGROUND, COSMOLOGY: OBSERVATIONS, RADIO CONTINUUM: GENERAL
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 www.atnf.csiro.au/Research/cmbr/cmbr_atca.html) F_l in multipole l-space peaks at l_eff=4700 and has half-maximum values at l=3350 and 6050.
Description:	Open Access
URI:	http://hdl.handle.net/2289/1536
ISSN:	0035-8711
Alternative Location:	http://adsabs.harvard.edu/cgi-bin/bib_query?1998MNRAS.298.1189S http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998MNRAS.298.1189S&link_type=ARTICLE&db_key=AST
Copyright:	(1998) Royal Astronomical Society
Appears in Collections:	Research Papers (A&A)

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