Fossil group origins - VIII. RX J075243.6+455653 a transitionary fossil group J. A. L. Aguerri, A. Longobardi, S. Zarattini, A. Kundert, E. D’Onghia and L. Domínguez-Palmero A&A, 609 (2018) A48 Published online: 05 January 2018 DOI: 10.1051/0004-6361/201731711