Imbrogno, M., Motta, S. E., Amato, R., Israel, G. L., Rodríguez-Castillo, G. A., Brightman, M., Casella, P., Bachetti, M., Fürst, F., Stella, L., Pinto, C., Pintore, F., Tombesi, F., Gúrpide, A., Middleton, M. J., Salvaggio, C., Tiengo, A., Belfiore, A., De Luca, A., Esposito, P., …Salvaterra, R. (2024). Skipping a beat: discovery of persistent quasi-periodic oscillations associated with pulsed fraction drop of the spin signal in M51 ULX-7. Astronomy & Astrophysics, 689, Article A284. https://doi.org/10.1051/0004-6361/202450432