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arxiv: astro-ph/0509215 · v1 · submitted 2005-09-08 · 🌌 astro-ph

High-significance Sunyaev-Zel'dovich measurement: Abell 1914 seen with the Arcminute Microkelvin Imager

AMI Collaboration: R. Barker , P. Biddulph , D. Bly , R. Boysen , A. Brown , C. Clementson , M. Crofts , T. Culverhouse
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J. Czeres R. Dace R. D'Alessandro P. Doherty P. Duffett-Smith K. Duggan J. Ely M. Felvus W. Flynn J. Geisbuesch K. Grainge W. Grainger D. Hammet R. Hills M. Hobson C. Holler R. Jilley M. Jones T. Kaneko R. Kneissl K. Lancaster A. Lasenby P. Marshall F. Newton O. Norris I. Northrop G. Pooley V. Quy R. Saunders A. Scaife J. Schofield P. Scott C. Shaw A. Taylor D. Titterington M. Velic E. Waldram S. West B. Wood G. Yassin J. Zwart
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keywords arcminuteclusterconsistentdecrementdovichimagermeasuredmicrokelvin
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We report the first detection of a Sunyaev-Zel'dovich (S-Z) decrement with the Arcminute Microkelvin Imager (AMI). We have made commissioning observations towards the cluster A1914 and have measured an integrated flux density of -8.61 mJy in a uv-tapered map with noise level 0.19 mJy/beam. We find that the spectrum of the decrement, measured in the six channels between 13.5-18GHz, is consistent with that expected for a S-Z effect. The sensitivity of the telescope is consistent with the figures used in our simulations of cluster surveys with AMI.

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