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The Evolutionary Map of the Universe pilot survey
Reiprich, Thomas H.; Koribalski, Bärbel S.; Norris, Ray P. +45 more
We present the data and initial results from the first pilot survey of the Evolutionary Map of the Universe (EMU), observed at 944 MHz with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope. The survey covers $270 deg^2$ of an area covered by the Dark Energy Survey, reaching a depth of 25-30 $µJy beam^{-1}$ rms at a spatial …
Diffuse galaxy cluster emission at 168 MHz within the Murchison Widefield Array Epoch of Reionization 0-h field
Pratt, G. W.; Johnston-Hollitt, M.; Offringa, A. R. +3 more
We detect and characterise extended, diffuse radio emission from galaxy clusters at 168 MHz within the Epoch of Reionization 0-h field: a$45^{\circ} \times 45^{\circ}$region of the southern sky centred on R. A.${}= 0^{\circ}$, decl.${}=-27^{\circ}$. We detect 29 sources of interest; a newly detected halo in Abell 0141; a newly detected relic in Ab…
Low-frequency integrated radio spectra of diffuse, steep-spectrum sources in galaxy clusters: palaeontology with the MWA and ASKAP
Bartalucci, I.; Johnston-Hollitt, M.; Duchesne, S. W.
Galaxy clusters have been found to host a range of diffuse, non-thermal emission components, generally with steep, power law spectra. In this work we report on the detection and follow-up of radio halos, relics, remnant radio galaxies, and other fossil radio plasmas in Southern Sky galaxy clusters using the Murchison Widefield Array and the Austra…
SPT-CL J2032-5627: A new Southern double relic cluster observed with ASKAP
Pratt, G. W.; Bartalucci, I.; Johnston-Hollitt, M. +2 more
We present a radio and X-ray analysis of the galaxy cluster SPT-CL J2032-5627. Investigation of public data from the Australian Square Kilometre Array Pathfinder (ASKAP) at 943 MHz shows two previously undetected radio relics at either side of the cluster. For both relic sources, we utilise archival Australia Telescope Compact Array (ATCA) data at…