Primary and secondary source of energy in the superluminous supernova 2018ibb Alexandra Kozyreva, Luke Shingles, Petr Baklanov, Alexey Mironov and Fabian R. N. Schneider A&A, 689 (2024) A60 Published online: 30 August 2024 DOI: 10.1051/0004-6361/202449919