Understanding type Ia supernovae through their U-band spectra J. Nordin, G. Aldering, P. Antilogus, C. Aragon, S. Bailey, C. Baltay, K. Barbary, S. Bongard, K. Boone, V. Brinnel et al. (33 more) A&A, 614 (2018) A71 Published online: 15 June 2018 DOI: 10.1051/0004-6361/201732137