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  • Denes, H.Netherlands Institute for Radio Astronomy (ASTRON) (author)

Characterising the Apertif primary beam response

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-11-04
  • EDP Sciences,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:099a8db7-5e4e-45d2-affd-5fd2a77ac1f8
  • https://research.chalmers.se/publication/533349URI
  • https://doi.org/10.1051/0004-6361/202244045DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Context. Phased array feeds (PAFs) are multi-element receivers in the focal plane of a telescope that make it possible to simultaneously form multiple beams on the sky by combining the complex gains of the individual antenna elements. Recently, the Westerbork Synthesis Radio Telescope (WSRT) was upgraded with PAF receivers to carry out several observing programs, including two imaging surveys and a time-domain survey. The Apertif imaging surveys use a configuration of 40 partially overlapping compound beams (CBs) simultaneously formed on the sky and arranged in an approximately rectangular shape. Aims. This work is aimed at characterising the response of the 40 Apertif CBs to create frequency-resolved I, XX, and YY polarization empirical beam shapes. The measured CB maps can be used for the image deconvolution, primary beam correction, and mosaicking processes of Apertif imaging data. Methods. We used drift scan measurements to measure the response of each of the 40 Apertif CBs. We derived beam maps for all individual beams in I, XX, and YY polarisation in 10 or 18 frequency bins over the same bandwidth as the Apertif imaging surveys. We sampled the main lobe of the beams and the side lobes up to a radius of 0.6 degrees from the beam centres. In addition, we derived beam maps for each individual WSRT dish. Results. We present the frequency and time dependence of the beam shapes and sizes. We compared the compound beam shapes derived with the drift scan method to beam shapes derived with an independent method using a Gaussian Process Regression comparison between the Apertif continuum images and the NRAO VLA Sky Survey (NVSS) catalogue. We find a good agreement between the beam shapes derived with the two independent methods.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Hess, K. M.Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Rijksuniversiteit Groningen,University of Groningen,Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Adams, E. A. K.Rijksuniversiteit Groningen,University of Groningen,Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Kutkin, A.Netherlands Institute for Radio Astronomy (ASTRON),Russian Academy of Sciences (author)
  • Morganti, R.Rijksuniversiteit Groningen,University of Groningen,Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • van der Hulst, J. M.Rijksuniversiteit Groningen,University of Groningen (author)
  • Oosterloo, T. A.Netherlands Institute for Radio Astronomy (ASTRON),Rijksuniversiteit Groningen,University of Groningen (author)
  • Moss, V. A.The University of Sydney,Commonwealth Scientific and Industrial Research Organisation (CSIRO),Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Adebahr, B.Ruhr-Universität Bochum (author)
  • de Blok, W. J. G.Rijksuniversiteit Groningen,University of Groningen,University of Cape Town,Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Ivashina, Marianna,1975Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ivashina (author)
  • Coolen, A. H. W. M.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Damstra, S.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Hut, B.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Loose, G. M.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Lucero, D. M.Virginia Polytechnic Institute and State University (Virginia Tech) (author)
  • Maan, Y.Netherlands Institute for Radio Astronomy (ASTRON),Tata Institute of Fundamental Research (author)
  • Mika, A.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Norden, M. J.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Oostrum, L. C.Universiteit Van Amsterdam,University of Amsterdam,Netherlands eScience Center,Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Pisano, D. J.University of Cape Town,West Virginia University (author)
  • Smits, R.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • van Cappellen, W. A.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • van den Brink, R.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • van der Schuur, D.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • van Diepen, G. N. J.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • van Leeuwen, J.Universiteit Van Amsterdam,University of Amsterdam,Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Vohl, D.Netherlands Institute for Radio Astronomy (ASTRON),Universiteit Van Amsterdam,University of Amsterdam (author)
  • Wijnholds, S. J.Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Ziemke, J.Universitetet i Oslo,University of Oslo,Netherlands Institute for Radio Astronomy (ASTRON) (author)
  • Netherlands Institute for Radio Astronomy (ASTRON)Agencia Estatal Consejo Superior de Investigaciones Científicas (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences6670004-63611432-0746

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