The outermost stellar halo of NGC 5128 (Centaurus A): Radial structure M. Rejkuba, W. E. Harris, L. Greggio, D. Crnojević and G. L. H. Harris A&A, 657 (2022) A41 Published online: 04 January 2022 DOI: 10.1051/0004-6361/202141347