Is there a non-stationary γ-ray emission zone 42 pc from the 3C 279 core? V. M. Patiño-Álvarez, S. A. Dzib, A. Lobanov and V. Chavushyan A&A, 630 (2019) A56 Published online: 23 September 2019 DOI: 10.1051/0004-6361/201834401