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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.Vaeisaenen, P.Childress, M.Pignata Libralato, GiulianoMcCully, C.Valenti, S.Vinkó, J.Pastorello, A.Elias Rosa, N.Fraser, M.Gal Yam, AvishayKotak, R.Kotilainen, J. K.Smartt, S. J.Galbany, LluisHarmanen, 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]

Smith, K. W.Balega, Y. Y.Lachaume, R.Duschl, W. J.Hofmann, K.-H.Preibisch, T.Schertl, D.Weigelt, G.[Close binary companions of the HAeBe stars LkHα 198, Elias 1, HK Ori and V380 Ori.]Close binary companions of the HAeBe stars LkHα 198, Elias 1, HK Ori and V380 Ori.

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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