eROSITA X-ray analysis of the PeVatron candidate Westerlund 1 Konstantin Haubner, Manami Sasaki, Alison Mitchell, Gabriele Ponti, Gavin Rowell, Sabrina Einecke, Miroslav Filipović, Sanja Lazarević, Gerd Pühlhofer and Andrew Strong A&A, 695 (2025) A3 Published online: 26 February 2025 DOI: 10.1051/0004-6361/202451964