Deep ATLAS Radio Observations of the ELAIS-S1/Spitzer Wide-Area Infrared Extragalctic field

TL;DR

This paper presents deep 1.4 GHz radio observations of the ELAIS-S1/Spitzer field, identifying numerous radio sources, many with infrared counterparts, and discovering new infrared-faint radio sources.

Contribution

It provides the first sensitive radio catalog of the ELAIS-S1/Spitzer field, including cross-matched infrared counterparts and the identification of infrared-faint radio sources.

Findings

Detected 1366 radio components grouped into 1276 sources.

Matched 1183 sources with infrared counterparts.

Discovered 31 radio sources without infrared counterparts.

Abstract

We have conducted sensitive (1 sigma<30 uJy) 1.4 GHz radio observations with the Australia Telescope Compact Array of a field largely coincident with infrared observations of the Spitzer Wide-Area Extragalactic Survey. The field is centred on the European Large Area ISO Survey S1 region and has a total area of 3.9 deg. We describe the observations and calibration, source extraction, and cross-matching to infrared sources. Two catalogues are presented; one of the radio components found in the image and one of radio sources with counterparts in the infrared and extracted from the literature. 1366 radio components were grouped into 1276 sources, 1183 of which were matched to infrared sources. We discover 31 radio sources with no infrared counterpart at all, adding to the class of Infrared-Faint Radio Sources.