Dong, SuboSuboDongShappee, B. J.B. J.ShappeePrieto, J. L.J. L.PrietoJha, S. W.S. W.JhaStanek, K. Z.K. Z.StanekHoloien, T. W. -S.T. W. -S.HoloienKochanek, C. S.C. S.KochanekThompson, T. A.T. A.ThompsonMorrell, N.N.MorrellThompson, I. B.I. B.ThompsonBasu, U.U.BasuBeacom, J. F.J. F.BeacomBersier, D.D.BersierBrimacombe, J.J.BrimacombeBrown, J. S.J. S.BrownBUFANO, FILOMENAFILOMENABUFANOChen, PingPingChenConseil, E.E.ConseilDanilet, A. B.A. B.DaniletFalco, E.E.FalcoGrupe, D.D.GrupeKiyota, S.S.KiyotaMasi, G.G.MasiNicholls, B.B.NichollsOlivares E., F.F.Olivares E.Pignata, G.G.PignataPojmanski, G.G.PojmanskiSimonian, G. V.G. V.SimonianSzczygiel, D. M.D. M.SzczygielWoźniak, P. R.P. R.Woźniak2020-07-232020-07-2320160036-8075http://hdl.handle.net/20.500.12386/26585We report the discovery of ASASSN-15lh (SN 2015L), which we interpret as the most luminous supernova yet found. At redshift z = 0.2326, ASASSN-15lh reached an absolute magnitude of M<SUB>u</SUB><SUB>,AB</SUB> = -23.5 ± 0.1 and bolometric luminosity L<SUB>bol</SUB> = (2.2 ± 0.2) × 10<SUP>45</SUP> ergs s<SUP>-1</SUP>, which is more than twice as luminous as any previously known supernova. It has several major features characteristic of the hydrogen-poor super-luminous supernovae (SLSNe-I), whose energy sources and progenitors are currently poorly understood. In contrast to most previously known SLSNe-I that reside in star-forming dwarf galaxies, ASASSN-15lh appears to be hosted by a luminous galaxy (M<SUB>K</SUB> ≈ -25.5) with little star formation. In the 4 months since first detection, ASASSN-15lh radiated (1.1 ± 0.2) × 10<SUP>52</SUP> ergs, challenging the magnetar model for its engine.STAMPAenArticle10.1126/science.aac96132-s2.0-84954357260000368098600036https://science.sciencemag.org/content/351/6270/2572016Sci...351..257DFIS/05 - ASTRONOMIA E ASTROFISICA