Spectral dataset of young type Ib supernovae and their time evolution N. Yesmin, C. Pellegrino, M. Modjaz, R. Baer-Way, D. A. Howell, I. Arcavi, J. Farah, D. Hiramatsu, G. Hosseinzadeh, C. McCully et al. (4 more) A&A, 693 (2025) A307 Published online: 29 January 2025 DOI: 10.1051/0004-6361/202452214