The long-term enhanced brightness of the magnetar 1E 1547.0–5408 Francesco Coti Zelati, Alice Borghese, Nanda Rea, Daniele Viganò, Teruaki Enoto, Paolo Esposito, José A. Pons, Sergio Campana and Gian Luca Israel A&A, 633 (2020) A31 Published online: 03 January 2020 DOI: 10.1051/0004-6361/201936317