Properties of active galaxies at the extreme of Eigenvector 1 M. Śniegowska, B. Czerny, B. You, S. Panda, J.-M. Wang, K. Hryniewicz and C. Wildy A&A, 613 (2018) A38 Published online: 28 May 2018 DOI: 10.1051/0004-6361/201730433