Hietarinta Chern–Simons supergravity and its asymptotic structure Patrick Concha, Octavio Fierro and Evelyn Rodríguez Eur. Phys. J. C, 84 1 (2024) 102 Published online: 30 January 2024 DOI: 10.1140/epjc/s10052-024-12468-4