Recurrent X-ray flares of the black hole candidate in the globular cluster RZ 2109 in NGC 4472 A. Tiengo, P. Esposito, M. Toscani, G. Lodato, M. Arca Sedda, S. E. Motta, F. Contato, M. Marelli, R. Salvaterra and A. De Luca A&A, 661 (2022) A68 Published online: 03 May 2022 DOI: 10.1051/0004-6361/202142662