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

Preprint

8 September 2005

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/0509215

Abstract

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.

Keywords

ARCMINUTE MICROKELVIN IMAGER
SUNYAEV ZEL'DOVICH
MICROKELVIN IMAGER
HIGH SIGNIFICANCE
ZEL'DOVICH

All Related Versions

Version 1, 2005-09-08, ArXiv
Published version: Monthly Notices of the Royal Astronomical Society: Letters, 369 (1), L1.

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