Deep ASKAP EMU Survey of the GAMA23 field: properties of radio sources

ABSTRACT We present the Australian Square Kilometre Array Pathfinder (ASKAP) observations of Galaxy and Mass Assembly (GAMA)-23h field. The survey was carried out at 887.5 MHz covers an ?83 square deg imaged calibrated visibility data, taken as part Evolutionary Mapping Universe Early Science Programme, using latest version ASKAPSoft pipeline. final mosaic has angular resolution 10 arcsec a central rms noise around 38 $\mu$Jy beam?1. derived radio source catalogue 39 812 entries above peak flux density threshold 5?. searched for host galaxy counterparts GAMA spectroscopic (with i-band magnitude limit 19.2 mag) multiwavelength catalogues that are available collaboration. identified hosts with redshifts 5934 sources. describe data reduction, imaging, identification process, counts. Thanks to wide area covered by our survey, we obtain very robust counts down 0.2 mJy. ASKAP’s exceptional speed, providing efficient, sensitive, high-resolution mapping large regions sky in conjunction GAMA23 field, allowed us discover 63 giant galaxies. presented here demonstrate excellent capabilities ASKAP pre-SKA era.