Radio observations of the Hubble Deep Field-South region. III : the 2.5, 5.2, and 8.7 GHz catalogs and radio source properties

Deep radio observations of a wide region centered on the Hubble Deep Field-South have been performed, providing one of the most sensitive sets of radio observations acquired on the Australia Telescope Compact Array to date. A central rms of ∼10 μJy is reached at four frequencies (1.4,2.5,5.2, and 8.7 GHz). In this paper the full source catalogs from the 2.5,5.2, and 8.7 GHz observations are presented to complement Paper II in this series, along with a detailed analysis of image quality and noise. We produce a consolidated catalog by matching sources across all four frequencies of our survey. Radio spectral indices are used to investigate the nature of the radio sources and identify a number of sources with flat or inverted radio spectra, which indicate active galactic nucleus activity. We also find several other interesting sources, including a broad-line-emitting radio galaxy, a giant radio galaxy, and three gigahertz-peaked spectrum sources.