Ultra Super Super Explosions

I tried to add another superlative to the title:  Ultraviolet Observations of Super-Chandrasekhar Mass Type Ia Supernova Candidates with Swift UVOT.  It would have been fair, since these objects are extreme, but seemed cheesy.  Nevertheless, Ultra-Super-Super Explosions seems an adequate short title.




Of the three objects studied, only one is a clear Super-Chandrasekhar mass SN Ia (2009dc).  SN2012dn was spectroscopically identified as similar to those events.  SN2011aa is very broad, and similarly UV bright, but not directly connected to the other Supers based on the data available to me, but Kamiya had a poster at the Munich supernova meeting showing the photometric light curves to match Super-Chandrasekhar mass SN models.

Here is the photometry.