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Radio imaging of the Subaru/XMM-Newton Deep Field -I. The 100-μJy catalogue, optical identifications, and the nature of the faint radio source population

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posted on 24.10.2012, 08:56 by C. Simpson, A. Martínez-Sansigre, S. Rawlings, R. Ivison, M. Akiyama, K. Sekiguchi, T. Takata, Y. Ueda, M. Watson
We describe deep radio imaging at 1.4 GHz of the 1.3-deg2 Subaru/XMM–Newton Deep Field (SXDF), made with the Very Large Array in B and C configurations. We present a radio map of the entire field, and a catalogue of 505 sources covering 0.8 deg2 to a peak flux density limit of 100 μJy. Robust optical identifications are provided for 90 per cent of the sources, and suggested identifications are presented for all but 14 (of which seven are optically blank, and seven are close to bright contaminating objects). We show that the optical properties of the radio sources do not change with flux density, suggesting that active galactic nuclei (AGN) continue to contribute significantly at faint flux densities. We test this assertion by cross-correlating our radio catalogue with the X-ray source catalogue and conclude that radio-quiet AGN become a significant population at flux densities below 300 μJy, and may dominate the population responsible for the flattening of the radio source counts if a significant fraction of them are Compton-thick.

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Citation

Monthly Notices of the Royal Astronomical Society, 2006, 372 (2), pp. 741-757

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Royal Astronomical Society (RAS)

issn

0035-8711

eissn

1365-2966

Copyright date

2006

Available date

24/10/2012

Publisher version

http://mnras.oxfordjournals.org/content/372/2/741

Language

en

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