Gu, Liyi, Mao, Junjie, Kaastra, Jelle S., Mehdipour, Missagh, Pinto, Ciro, Grafton-Waters, Sam, Bianchi, Stefano, Landt, Hermine, Branduardi-Raymont, Graziella, Costantini, Elisa, Ebrero, Jacobo, Petrucci, Pierre-Olivier, Behar, Ehud, di Gesu, Laura, De Marco, Barbara, Matt, Giorgio, Mitchell, Jake A.J., Peretz, Uria, Ursini, Francesco, Ward, Martin, "Detection of an unidentified soft X-ray emission feature in NGC 5548", Astronomy & Astrophysics, 2025