SN 1999eu was a type IIP supernova that happened in NGC 1097 in the constellation Fornax. It was discovered 5 November 1999, possibly three months after its initial brightening, and is unusually under-luminous for a type II supernova.
^Pastorello, A.; Zampieri, L.; Turatto, M.; Cappellaro, E.; Meikle, W. P. S.; Benetti, S.; Branch, D.; Baron, E.; Patat, F.; Armstrong, M.; Altavilla, G.; Salvo, M.; Riello, M. (2004). "Low-luminosity Type II supernovae: spectroscopic and photometric evolution". Monthly Notices of the Royal Astronomical Society. 347 (1): 74–94. Bibcode:2004MNRAS.347...74P. arXiv:astro-ph/0309264. doi:10.1111/j.1365-2966.2004.07173.x.
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