APEX-SZ: The Atacama Pathfinder EXperiment Sunyaev-Zel'dovich Instrument
Magazine article, 2012

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.


Sunyaev-Zeldovich effect

clusters of galaxies


D. Schwan

R. Kneissl

P. Ade

K. Basu

A. Bender

F. Bertoldi

H. Böhringer

H.-M. Cho

G. Chon

M. Dobbs

D. Ferrusca

D. Flanigan

N. Halverson

W. Holzapfel

Cathy Horellou

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

Daniel Johansson

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

B. Johnson

J. Kennedy

Z. Kermish

M. Klein

T. Lanting

A. Lee

M. Lueker

J. Mehl

K. Menten

D. Muders

F. Pacaud

T. Plagge

C. Reichardt

P. Richards

R. Schaaf

P. Schilke

M. Sommer

H. Spieler

C. Tucker

A. Weiss

B. Westbrook

O. Zahn

The Messenger

Vol. 147 7-12

Subject Categories

Astronomy, Astrophysics and Cosmology


Onsala Space Observatory

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