High-significance sunyaev-zel'dovich measurement: Abell 1914 seen with the Arcminute Microkelvin Imager

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    Abstract

    We report the first detection of a Sunyaev-Zel'dovich (S-Z) decrement using the Arcminute Microkelvin Imager (AMI). We have made commissioning observations towards the cluster of galaxies A1914 and detected the S-Z effect with a significance of 17σ in a uυ-tapered map at a mean frequency of 15.75 GHz. The integrated S-Z flux density of -8.6 ± 0.5 mJy is consistent with a simple X-ray derived model for the intracluster gas. We find that the spectrum of the decrement, measured in the six channels between 13.5-18 GHz, fits well to that expected for the S-Z effect. The sensitivity of the telescope is consistent with the figures used in our simulations of cluster surveys with AMI.

    Original languageEnglish
    Pages (from-to)L1-L4
    Number of pages4
    JournalMonthly Notices of the Royal Astronomical Society: Letters
    Volume369
    Issue number1
    DOIs
    Publication statusPublished - 1 Jun 2006

    Keywords

    • Cosmic microwave background
    • Galaxies: clusters: individual: A1914

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