First results from the Very Small Array -- III. The CMB power spectrum

Paul F. Scott , Pedro Carreira , Kieran Cleary , Rod D. Davies , Richard Davis , Clive Dickinson , Keith Grainge , Carlos Gutierrez

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Michael P. Hobson Michael E. Jones Ruediger Kneissl Anthony Lasenby Klaus Maisinger Guy Pooley Rafael Rebolo Jose Alberto Rubino Martin Pedro Sosa Molina Ben Rusholme Richard Saunders Richard Savage Anze Slosar Angela C. Taylor David Titterington Elizabeth Waldram Robert A. Watson Althea Wilkinson

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classification 🌌 astro-ph

keywords powerfirstspectrumveryarrayresultssmallacoustic

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We present the power spectrum of the fluctuations in the cosmic microwave background detected by the Very Small Array (VSA) in its first season of observations in its compact configuration. We find clear detections of first and second acoustic peaks at l~200 and l~550, plus detection of power on scales up to l=800. The VSA power spectrum is in very good agreement with the results of the Boomerang, Dasi and Maxima telescopes despite the differing potential systematic errors.

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First results from the Very Small Array -- III. The CMB power spectrum

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