Planck intermediate results: XXXVI. Optical identification and redshifts of Planck SZ sources with telescopes at the Canary Islands observatories

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  • Planck Collaboration

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  • Max Planck Institute for Extraterrestrial Physics
  • Institut d 'Astrophysique de Paris
  • University of Oxford
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  • International School for Advanced Studies
  • Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
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  • Academy of Sciences Tatarstan
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  • Kavli Institute for Cosmology Cambridge
  • University of Cambridge
  • Université de Toulouse
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  • Instituto de Física de Cantabria (CSIC-Universidad de Cantabria)
  • Instituto de Astrofísica de Canarias
  • University of La Laguna
  • Università Degli Studi di Padova
  • Université Pierre and Marie Curie
  • University College London
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  • California Institute of Technology
  • Princeton University
  • Niels Bohr Institute
  • Imperial College London
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  • University of Oslo
  • Università La Sapienza
  • University of Helsinki


We present the results of approximately three years of observations of Planck Sunyaev-Zeldovich (SZ) sources with telescopes at the Canary Islands observatories as part of the general optical follow-up programme undertaken by the Planck Collaboration. In total, 78 SZ sources are discussed. Deep-imaging observations were obtained for most of these sources; spectroscopic observations in either in long-slit or multi-object modes were obtained for many. We effectively used 37.5 clear nights. We found optical counterparts for 73 of the 78 candidates. This sample includes 53 spectroscopic redshift determinations, 20 of them obtained with a multi-object spectroscopic mode. The sample contains new redshifts for 27 Planck clusters that were not included in the first Planck SZ source catalogue (PSZ1).


Original languageEnglish
Article numberA139
Pages (from-to)1-15
Number of pages15
JournalAstronomy and Astrophysics
Publication statusPublished - 1 Feb 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • catalogs, galaxies: clusters: general, Large-scale structure of Universe

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