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

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 f...

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Hauptverfasser:	AMI Collaboration, Barker, R, Biddulph, P, Bly, D, Boysen, R, Brown, A, Clementson, C, Crofts, M, Culverhouse, T, Czeres, J, Dace, R, D'Alessandro, R, Doherty, P, Duffett-Smith, P, Duggan, K, Ely, J, Felvus, M, Flynn, W, Geisbuesch, J, Grainge, K, Grainger, W, Hammet, D, Hills, R, Hobson, M, Holler, C, Jilley, R, Jones, M, Kaneko, T, Kneissl, R, Lancaster, K, Lasenby, A, Marshall, P, Newton, F, Norris, O, Northrop, I, Pooley, G, Quy, V, Saunders, R, Scaife, A, Schofield, J, Scott, P, Shaw, C, Taylor, A, Titterington, D, Velic, M, Waldram, E, West, S, Wood, B, Yassin, G, Zwart, J
Format:	Artikel
Sprache:	eng
Schlagworte:	Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics
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Beschreibung
Zusammenfassung:	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.
DOI:	10.48550/arxiv.astro-ph/0509215