Spectral and magnetic properties of the jet base in NGC 315 L. Ricci, B. Boccardi, J. Röder, M. Perucho, G. Mattia, M. Kadler, P. Benke, V. Bartolini, T. P. Krichbaum and E. Madika A&A, 693 (2025) A172 Published online: 14 January 2025 DOI: 10.1051/0004-6361/202451434