Type Iax Supernovae: A New Class of Stellar Explosion: This new class currently has 25 members, are spectroscopically similar to SNe Ia, but have lower maximum-light velocities, and most have hot photospheres. Relative to SNe Ia, SNe Iax have low luminosities for their light-curve shape. The Puckett Observatory Supernova Search has discovered 7 of them: 2008ha, 2008ae, 2007J, 2006hn, 2005cc, 2003gq, 2002bp. An article about this discovery is posted on the Science Daily website. http://www.sciencedaily.com/releases/2013/03/130326133337.htm. The paper published by the discovers is posted here: http://arxiv.org/abs/1212.2209
The POSS search team made a rare discovery of two supernovae in one galaxy. Details of the discovery in UGC 4132 can be found in the IAU circular 8605.