ASKAP commissioning observations of the GAMA 23 field by Leahy, DA, Hopkins, AM, Norris, RP, Marvil, J, Collier, JD, Taylor, EN, Allison, JR, Anderson, C, Bell, M, Bilicki, M, Bland-Hawthorn, J, Brough, S, Brown, MJI, Driyer, S, Gurkan, G, Haryey-Smith, L, Heywood, I, Holwerda, BW, Liske, J, Lopez-Sanchez, AR, McConnell, D, Moffett, A, Owers, MS, Pimbblet, KA, Raja, W, Seymour, N, Voronkov, MA, Wang, L