EPJ Web of Conferences (Jan 2022)

CONCERTO at APEX: Installation and first phase of on-sky commissioning

  • Catalano A.,
  • Ade P.,
  • Aravena M.,
  • Barria E.,
  • Beelen A.,
  • Benoit A.,
  • Béthermin M.,
  • Bounmy J.,
  • Bourrion O.,
  • Bres G.,
  • De Breuck C.,
  • Calvo M.,
  • Désert F.-X.,
  • Durán C.A,
  • Duvauchelle G.,
  • Eraud L.,
  • Fasano A.,
  • Fenouillet T.,
  • Garcia J.,
  • Garde G.,
  • Goupy J.,
  • Groppi C.,
  • Hoarau C.,
  • Hu W.,
  • Lagache G.,
  • Lambert J.-C.,
  • Leggeri J.-P.,
  • Levy-Bertrand F.,
  • Macías-Pérez J.,
  • Mani H.,
  • Marpaud J.,
  • Marton M.,
  • Mauskopf P.,
  • Monfardini A.,
  • Pisano G.,
  • Ponthieu N.,
  • Prieur L.,
  • Raffin G.,
  • Roni S.,
  • Roudier S.,
  • Tourres D.,
  • Tucker C.,
  • Vivargent L.

DOI
https://doi.org/10.1051/epjconf/202225700010
Journal volume & issue
Vol. 257
p. 00010

Abstract

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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.