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

Butler, Andrew and Huynh, Minh and Delhaize, Jacinta and Smolčić, Vernesa and Kapińska, Anna and Milaković, Dinko and Novak, Mladen and Baran, Nikola and O'Brien, Andrew and Chiappetti, Lucio and Desai, Shantanu and Fotopoulou, Sotiria and Horellou, Cathy and Lidman, Chris and Pierre, Marguerite (2018) The XXL Survey. XVIII. ATCA 2.1 GHz radio source catalogue and source counts for the XXL-South field. Astronomy and Astrophysics, 620. A3-1-A3-17. ISSN 0004-6361

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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 ~4.8’’ and a median rms noise of σ ≈ 41 μJy/beam. To date, this is the largest area radio survey to reach this flux density level. A total of 6350 radio components above 5σ 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 α = -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 differential 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.

Item Type: Article
Keywords: galaxies: general; galaxies: evolution; galaxies: active; radio continuum: galaxies; surveys; catalogs
Date: 20 November 2018
Subjects: NATURAL SCIENCES > Physics > Astronomy and Astrophysics
Additional Information: ©ESO 2018. Received 25 November 2016; Accepted 12 March 2017; Published online 20 November 2018.
Divisions: Faculty of Science > Department of Physics
Publisher: EDP Sciences
Depositing User: Vernesa Smolčić
Date Deposited: 03 May 2019 08:24
Last Modified: 06 May 2019 12:41

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