ATLAS - I. Third release of 1.4 GHz mosaics and component catalogues

T. M O Franzen, J. K. Banfield, C. A. Hales, A. Hopkins, R. P. Norris, Nick Seymour, K. E. Chow, A. Herzog, M. T. Huynh, E. Lenc, Minnie Y. Mao, Enno Middelberg

    Research output: Contribution to journalArticlepeer-review

    65 Citations (Scopus)

    Abstract

    We present the third data release from the Australia Telescope Large Area Survey. These data combine the observations at 1.4 GHz before and after upgrades to the Australia Telescope Compact Array reaching a sensitivity of 14 μJy beam−1 in 3.6 deg2 over the Chandra Deep Field South (CDFS) and of 17 μJy beam−1 in 2.7 deg2 over the European Large Area ISO Survey South 1 (ELAIS-S1). We used a variety of array configurations to maximize the uv coverage resulting in a resolution of 16 by 7 arcsec in CDFS and of 12 by 8 arcsec in ELAIS-S1. After correcting for peak bias and bandwidth smearing, we find a total of 3034 radio source components above 5σ in CDFS, of which 514 (17 per cent) are considered to be extended. The number of components detected above 5σ in ELAIS-S1 is 2084, of which 392 (19 per cent) are classified as extended. The catalogues include reliable spectral indices (Δα < 0.2) between 1.40 and 1.71 GHz for ∼350 of the brightest components.

    Original languageEnglish
    Pages (from-to)4020-4036
    Number of pages17
    JournalMonthly Notices of the Royal Astronomical Society
    Volume453
    Issue number4
    DOIs
    Publication statusPublished - 11 Nov 2015

    Keywords

    • methods: data analysis
    • catalogues
    • surveys
    • radio continuum: galaxies
    • DEEP FIELD-SOUTH
    • INFRARED EXTRAGALACTIC FIELD
    • SPECTRAL INDEX PROPERTIES
    • VLA-COSMOS SURVEY
    • AREA ISO SURVEY
    • RADIO OBSERVATIONS
    • SKY SURVEY
    • SOURCE EXTRACTION
    • STRIPE 82
    • CDF-S

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