The XXL Survey XVIII. ATCA 2.1 GHz radio source catalogue and source counts for the XXL-South field
Journal article, 2018

The 2.1 GHz radio source catalogue of the 25 deg(2) ultimate XMM extragalactic survey south (XXL-S) field, observed with the Australia Telescope Compact Array (ATCA), is presented. The final radio mosaic achieved a resolution of similar to 4.8" and a median rms noise of sigma approximate to 41 mu Jy/beam. To date, this is the largest area radio survey to reach this flux density level. A total of 6350 radio components above 5 sigma are included in the component catalogue, 26.4% of which are resolved. Of these components, 111 were merged together to create 48 multiple-component radio sources, resulting in a total of 6287 radio sources in the source catalogue, 25.9% of which were resolved. A survival analysis revealed that the median spectral index of the Sydney University Molonglo Sky Survey (SUMSS) 843 MHz sources in the field is alpha = 0.75, consistent with the values of -0.7 to -0.8 commonly used to characterise radio spectral energy distributions of active galactic nuclei. The 2.1 GHz and 1.4 GHz di ff erential radio source counts are presented and compared to other 1.4 GHz radio surveys. The XXL-S source counts show good agreement with the other surveys.

galaxies: evolution



radio continuum: galaxies

galaxies: general

galaxies: active


Andrew Butler

University of Western Australia

Minh Huynh

University of Western Australia

CSIRO Astronomy and Space Science

Jacinta Delhaize

University of Zagreb

Vernesa Smolcic

University of Zagreb

Anna Kapinska

University of Western Australia

Dinko Milakovic

University of Zagreb

Mladen Novak

University of Zagreb

Nikola Baran

University of Zagreb

Andrew O'Brien

Western Sydney University

Lucio Chiappetti

IASF Milano

Shantanu Desai

IIT Hyderabad

Sotiria Fotopoulou

University of Geneva

Cathy Horellou

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Extragalactic Astrophysics

Chris Lidman

Australian Astronomical Observatory

Marguerite Pierre

University Paris-Saclay

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 620 A3

Subject Categories

Accelerator Physics and Instrumentation

Astronomy, Astrophysics and Cosmology

Signal Processing



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