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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

We present the complete set of ultra-violet, optical and near-infrared photometry and spectroscopy for SN 2012ca, covering the period from 6 d prior to maximum light, until 531 d after maximum. The spectroscopic time series for SN 2012ca is essentially unchanged over 1.5 yr, and appear to be domi...


Inserra, C.Fraser, M.Smartt, S. J.Benetti, S.Chen, T.-W.Childress, M.Gal-Yam, A.Howell, D. A.Kangas, T.Pignata, G.Polshaw, J.Sullivan, M.Smith, K. W.Valenti, S.Young, D. R.Parker, S.Seccull, T.McCrum, M.[On Type IIn/Ia-CSM supernovae as exemplified by SN 2012ca]On Type IIn/Ia-CSM supernovae as exemplified by SN 2012ca

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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