Authors: A Gal-Yam; P Mazzali; E O Ofek; P E Nugent; S R Kulkarni; M M Kasliwal; R M Quimby; A V Filippenko; S B Cenko; R Chornock; R Waldman; D Kasen; M Sullivan; E C Beshore; A J Drake; R C Thomas; J S Bloom; D Poznanski; A A Miller; R J Foley; J M Silverman; I Arcavi; R S Ellis; J Deng Journal: Nature Date: 2009-12-03 Impact factor: 49.962