SUPERNOVA 2009kf: AN ULTRAVIOLET BRIGHT TYPE IIP SUPERNOVA DISCOVERED WITH PAN-STARRS 1 AND GALEX

Maria Botticella, Carrie Trundle, Andrea Pastorello, S. Rodney, A. Rest, S. Gezari, Stephen Smartt, G. Narayan, M.E. Huber, J.L. Tonry, David Young, Kenneth Smith, F. Bresolin, Stefano Valenti, Rubina Kotak, Seppo Mattila, E. Kankare, W.M. Wood-Vasey, A. Riess, J.D. NeillK. Forster, D.C. Martin, C.W. Stubbs, W.S. Burgett, K.C. Chambers, T. Dombeck, H. Flewelling, T. Grav, J.N. Heasley, K.W. Hodapp, N. Kaiser, R. Kudritzki, G. Luppino, R.H. Lupton, E.A. Magnier, D.G. Monet, J.S. Morgan, P.M. Onaka, P.A. Price, P.H. Rhoads, W.A. Siegmund, W.E. Sweeney, R.J. Wainscoat, C. Waters, M.F. Waterson, C.G. Wynn-Williams

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43 Citations (Scopus)

Abstract

We present photometric and spectroscopic observations of a luminous Type IIP Supernova (SN) 2009kf discovered by the Pan-STARRS 1 (PS1) survey and also detected by the Galaxy Evolution Explorer. The SN shows a plateau in its optical and bolometric light curves, lasting approximately 70 days in the rest frame, with an absolute magnitude of M-V = - 18.4 mag. The P-Cygni profiles of hydrogen indicate expansion velocities of 9000 km s(-1) at 61 days after discovery which is extremely high for a Type IIP SN. SN 2009kf is also remarkably bright in the near-ultraviolet (NUV) and shows a slow evolution 10-20 days after optical discovery. The NUV and optical luminosity at these epochs can be modeled with a blackbody with a hot effective temperature (T similar to 16,000 K) and a large radius (R similar to 1 x 10(15) cm). The bright bolometric and NUV luminosity, the light curve peak and plateau duration, the high velocities, and temperatures suggest that 2009kf is a Type IIP SN powered by a larger than normal explosion energy. Recently discovered high-z SNe (0.7
Original languageEnglish
Pages (from-to)L52-L56
Number of pages5
JournalAstrophysical Journal Letters
Volume717
DOIs
Publication statusPublished - 2010

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