CONCERTO at APEX: Installation and first phase of on-sky commissioning
1 Astronomy Instrumentation Group, University of Cardiff, The Parade, CF24 3AA, United Kindgom
2 Núcleo de Astronomía, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército 441, Santiago, Chile
3 Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
4 Groupement d’Interet Scientifique KID, 38000 Grenoble and 38400 Saint Martin d’Héres, France
5 Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille), F-13388 Marseille, France
6 Univ. Grenoble Alpes, CNRS, LPSC/IN2P3, 38000 Grenoble, France
7 European Southern Observatory, Karl Schwarzschild Straße 2, 85748 Garching, Germany
8 Univ. Grenoble Alpes, CNRS, IPAG, 38400 Saint Martin d’Héres, France
9 European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile
10 School of Earth and Space Exploration and Department of Physics, Arizona State University, Tempe, AZ 85287, USA
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Published online: 17 January 2022
CONCERTO (CarbON CII line in post-rEionisation and ReionisaTiOn) is a large field-of-view (FoV) spectro-imager that has been installed on the Cassegrain Cabin of Atacama Pathfinder EXperiment (APEX) telescope in April 2021. CONCERTO hosts 2 focal planes and a total number of 4000 Kinetic Inductance Detectors (KID), with an instantaneous FoV of 18.6 arcminutes in the range of 130-310 GHz. The spectral resolution can be easily tuned down to 1 GHz depending on the scientific target. The scientific program of CONCERTO has many objectives, with two main programs focused on mapping the fluctuations of the [CII] line intensity in the reionisation and postreionisation epoch (4.5<z<8.5), and on studying galaxy clusters via the thermal and kinetic Sunyaev-Zel’dovich (SZ) effect. CONCERTO will also measure the dust and molecular gas contents of local and intermediate-redshift galaxies, it will study the Galactic star-forming clouds and finally it will observe the CO intensity fluctuations arising from 0.3<z<2 galaxies.
The design of the instrument, installation at APEX and current status of the commissioning phase and science verification will be presented. Also we describe the deployment and first on-sky tests performed between April and June 2021.
© The Authors, published by EDP Sciences, 2022
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