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We present optical imaging and spectroscopy of supernova (SN) LSQ13fn, a type II supernova with several hitherto-unseen properties. Although it initially showed strong symmetric spectral emission features attributable to He ii, N iii, and C iii, reminiscent of some interacting SNe, it transitione...


Polshaw, J.Kotak, R.Dessart, L.Fraser, M.Gal-Yam, A.Inserra, C.Sim, S. A.Smartt, S. J.Sollerman, J.Baltay, C.Rabinowitz, D.Benetti, S.Botticella, M. T.Campbell, H.Chen, T.-W.Galbany, L.McKinnon, R.Nicholl, M.Smith, K. W.Sullivan, M.Takáts, K.Valenti, S.Young, D. R.[LSQ13fn: A type II-Plateau supernova with a possibly low metallicity progenitor that breaks the standardised candle relation]LSQ13fn: A type II-Plateau supernova with a possibly low metallicity progenitor that breaks the standardised candle relation

Valenti, S.Fraser, M.;Benetti, S.Pignata, G.Sollerman, J.Inserra, C.Cappellaro, E.Pastorello, A.Smartt, S. J.Ergon, M.Botticella, M. T.Brimacombe, J.Bufano, F.Crockett, M.Eder, I.Fugazza, D.Haislip, J. B.Hamuy, M.Ivarsen, K. M.Kankare, E.Kotak, R.LaCluyze, A. P.Magill, L.Mattila, S.Maza, J.Mazzali, P. A.Reichart, D. E.Taubenberger, S.Turatto, M.Zampieri, L.Harutyunyan, K.M.[SN 2009jf: a slow-evolving stripped-envelope core-collapse supernova]SN 2009jf: a slow-evolving stripped-envelope core-collapse supernova

It is well known that massive stars (M > 8 M ) evolve up to the collapse of the stellar core, resulting in most cases in a supernova (SN) explosion. Their heterogeneity is related mainly to different configurations of the progenitor star at the moment of the explosion and to their immediate envir...


Elias-Rosa, N.Van Dyk, S.D.Benetti, S.Cappellaro, E.Smith, N.Kotak, R.Turatto, M.Filippenko, A.V.Pignata, G.Fox, O.D.Galbany, L.González-Gaitán, S.Miluzio, M.Monard, L.A.G.Ergon, M.[The Type IIn Supernova SN 2010bt: The Explosion of a Star in Outburst]The Type IIn Supernova SN 2010bt: The Explosion of a Star in Outburst

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