SN 2213−1745

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]

SN 2213-1745

Light curves for SN 2213-45 in three photometric bands, plotted from data published by Cooke et al. (2012)[1]
Event type	Supernova
SLNS-R
Date	Supernova Legacy Survey
Constellation	Aquarius
Right ascension	22h 13m 39.970s[1]
Declination	−17° 45′ 24.49″[1]
Epoch	J2000.0
Distance	z=2.0458±0.0005
Redshift	2.0458 ±0.0005
Progenitor	~250 M☉ star
Other designations	SN J2213-1745[2]

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]