APEX-SZ: The Atacama Pathfinder EXperiment Sunyaev-Zel'dovich instrument

Schwan, D., Kneissl, R., Ade, P. ORCID: https://orcid.org/0000-0002-5127-0401, Basu, K., Bender, A., Bertoldi, F., Bohringer, H., Cho, H. -M., Chon, G., Clarke, J., Dobbs, M., Ferrusca, D., Flanigan, D., Halverson, N., Holzapfel, W., Horellou, C., Johansson, D., Johnson, B., Kennedy, J., Kermish, Z., Klein, M., Lanting, T., Lee, A., Lueker, M., Mehl, J., Menten, K., Muders, D., Pacaud, F., Plagge, T., Reichardt, C., Richards, P., Schaaf, R., Schilke, P., Sommer, M., Spieler, H., Tucker, C. ORCID: https://orcid.org/0000-0002-1851-3918, Weiss, A., Westbrook, B. and Zahn, O. 2012. APEX-SZ: The Atacama Pathfinder EXperiment Sunyaev-Zel'dovich instrument. The ESO Messenger 147 , pp. 7-12.

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Abstract

The APEX-SZ instrument was a millimetre-wave (150 GHz) cryogenic receiver for the APEX telescope designed to observe galaxy clusters via the Sunyaev-Zel'dovich Effect (SZE). The receiver contained a focal plane of 280 superconducting transition-edge sensor bolometers equipped with a frequency-domain-multiplexed readout system, and it played a key role in the introduction of these new, robust, and scalable technologies. With 1-arcminute resolution, the instrument had a higher instantaneous sensitivity and covered a larger field of view (22 arcminutes) than earlier generations of SZE instruments. During its period of operation from 2007 to 2010, APEX-SZ was used to image over 40 clusters and map fields overlapping with external datasets. This paper briefly describes the instrument and data reduction procedure and presents a cluster image gallery, as well as results for the Bullet cluster, Abell 2204, Abell 2163, and a power spectrum analysis in the XMM-LSS field.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Last Modified:	12 May 2023 14:00
URI:	https://orca.cardiff.ac.uk/id/eprint/156777

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