SN 2008ha: AN EXTREMELY LOW LUMINOSITY AND EXCEPTIONALLY LOW ENERGY SUPERNOVA

@article{Foley2009SN2A,
  title={SN 2008ha: AN EXTREMELY LOW LUMINOSITY AND EXCEPTIONALLY LOW ENERGY SUPERNOVA},
  author={Ryan J. Foley and Ryan Chornock and Alexei V. Filippenko and Mohan Ganeshalingam and Robert P. Kirshner and Weidong Li and S. Bradley Cenko and Peter Challis and Andrew S. Friedman and Maryam Modjaz and Jeffrey M. Silverman and W. Michael Wood-Vasey},
  journal={The Astronomical Journal},
  year={2009},
  volume={138},
  pages={376 - 391}
}
We present ultraviolet, optical, and near-infrared photometry as well as optical spectra of the peculiar supernova (SN) 2008ha. SN 2008ha had a very low peak luminosity, reaching only MV = −14.2 mag, and low line velocities of only ∼2000 km s−1 near maximum brightness, indicating a very small kinetic energy per unit mass of ejecta. Spectroscopically, SN 2008ha is a member of the SN 2002cx-like class of SNe, a peculiar subclass of SNe Ia; however, SN 2008ha is the most extreme member, being… 

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