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Loken, S. Perlmutter, Y. Copin","submitted_at":"2010-03-10T21:51:22Z","abstract_excerpt":"We present photometric and spectroscopic observations of SN 2007if, an overluminous (M_V = -20.4), red (B-V = 0.16 at B-band maximum), slow-rising (t_rise = 24 days) type Ia supernova in a very faint (M_g = -14.10) host galaxy.  A spectrum at 5 days past  B-band maximum light is a direct match to the super-Chandrasekhar-mass candidate SN Ia 2003fg, showing Si II and C II at ~9000 km/s.  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