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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

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

Kangas, T.Mattila, S.Kankare, E.Lundqvist, P.Väisänen, P.Childress, M.Pignata, G.McCully, C.Valenti, S.Vinkó, J.Pastorello, A.Elias-Rosa, N.Fraser, M.Gal-Yam, A.Kotak, R.Kotilainen, J. K.Smartt, S. J.Galbany, L.Harmanen, J.Howell, D. A.Inserra, C.Marion, G. H.Quimby, R. M.Silverman, J. M.Szalai, T.Wheeler, J. C.Ashall, C.Benetti, S.Romero-Cañizales, C.Smith, K. W.Sullivan, M.Takáts, K.Young, D. R.[Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: The big brother of SN 1998S]Supernova 2013fc in a circumnuclear ring of a luminous infrared galaxy: The big brother of SN 1998S

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