Ensemble power spectral density of SDSS quasars in UV/optical bands V. Petrecca, I. E. Papadakis, M. Paolillo, D. De Cicco and F. E. Bauer A&A, 686 (2024) A286 Published online: 20 June 2024 DOI: 10.1051/0004-6361/202449161