SN 2213-1745 was an extremely remote superluminous supernova (SLSN), which occurred in between November 2004 and June 2005.[1] It was discovered in Canada-France-Hawaii Telescope Legacy Survey data.[3] Its peak far-ultraviolet absolute magnitude reached −21.2, which was comparable to the total absolute magnitude of its host galaxy. The distance (redshift) to this supernova z=2.0458±0.0005 makes it one of the most remote supernova observed as of 2012. The luminosity of SN 2213-1745 evolved slowly over several years as it was still detectable in November 2006. Both the high luminosity and slow decay indicate that the supernova's progenitor was a star with an initial mass as high as 250 solar masses.[1] The supernova explosion itself may have been a pair-instability supernova[4] similar to the SN 2007bi event, with which it shares many similarities.[1]
Observations of SN 2213-1745 imply that more than 3 solar masses of radioactive 56Ni may have been released by the star's explosion.[5]
