SN 2009ib: a Type II-P supernova with an unusually long plateau
SN 2009ib: a Type II-P supernova with an unusually long plateau
We present optical and near-infrared photometry and spectroscopy of SN 2009ib, a Type II-P supernova in NGC 1559. This object has moderate brightness, similar to those of the intermediate-luminosity SNe 2008in and 2009N. Its plateau phase is unusually long, lasting for about 130 days after explosion. The spectra are similar …