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We have observed the G23 field of the Galaxy And Mass Assembly (GAMA) surveyusing the Australian Square Kilometre Array Pathfinder (ASKAP) in itscommissioning phase, to validate the performance of the telescope and tocharacterize the detected galaxy populations. This observation covers $\sim$48deg$^2$ with synthesized beam of 32.7$^{\prime\prime}$ by 17.8$^{\prime\prime}$at 936 MHz, and $\sim$39 deg$^2$ with synthesized beam of 15.8$^{\prime\prime}$by 12.0$^{\prime\prime}$ at 1320 MHz. At both frequencies, the r.m.s.(root-mean-square) noise is $\sim$0.1 mJy/beam. We combine these radioobservations with the GAMA galaxy data, which includes spectroscopy of galaxiesthat are i-band selected with a magnitude limit of 19.2. Wide-field InfraredSurvey Explorer (WISE) infrared (IR) photometry is used to determine whichgalaxies host an active galactic nucleus (AGN). In properties including sourcecounts, mass distributions, and IR vs. radio luminosity relation, the ASKAPdetected radio sources behave as expected. Radio galaxies have higher stellarmass and luminosity in IR, optical and UV than other galaxies. We apply opticaland IR AGN diagnostics and find that they disagree for $\sim$30% of thegalaxies in our sample. We suggest possible causes for the disagreement. Somecases can be explained by optical extinction of the AGN, but for more than halfof the cases we do not find a clear explanation. Radio sources are more likely($\sim$6%) to have an AGN than radio quiet galaxies ($\sim$1%), but themajority of AGN are not detected in radio at this sensitivity.

ASKAP Commissioning Observations of the GAMA 23 Field