Abbott, B. P.B. P.AbbottAbbott, R.R.AbbottAbbott, T. D.T. D.AbbottAbraham, S.S.AbrahamAcernese, F.F.AcerneseAckley, K.K.AckleyAdams, C.C.AdamsAdya, V. B.V. B.AdyaAffeldt, C.C.AffeldtAgathos, M.M.AgathosAgatsuma, K.K.AgatsumaAggarwal, N.N.AggarwalAguiar, O. D.O. D.AguiarAiello, L.L.AielloAin, A.A.AinAjith, P.P.AjithAllen, G.G.AllenAllocca, A.A.AlloccaAloy, M. A.M. A.AloyAltin, P. A.P. A.AltinAmato, A.A.AmatoAnand, S.S.AnandAnanyeva, A.A.AnanyevaAnderson, S. B.S. B.AndersonAnderson, W. G.W. G.AndersonAngelova, S. V.S. V.AngelovaAntier, S.S.AntierAppert, S.S.AppertArai, K.K.AraiAraya, M. C.M. C.ArayaAreeda, J. S.J. S.AreedaArène, M.M.ArèneArnaud, N.N.ArnaudAronson, S. M.S. M.AronsonAscenzi, S.S.AscenziAshton, G.G.AshtonAston, S. M.S. M.AstonAstone, P.P.AstoneAubin, F.F.AubinAufmuth, P.P.AufmuthAultoneal, K.K.AultonealAustin, C.C.AustinAvendano, V.V.AvendanoAvila-Alvarez, A.A.Avila-AlvarezBabak, S.S.BabakBacon, P.P.BaconBadaracco, F.F.BadaraccoBader, M. K.M.M. K.M.BaderBae, S.S.BaeBaird, J.J.BairdBaker, P. T.P. T.BakerBaldaccini, F.F.BaldacciniBallardin, G.G.BallardinBallmer, S. W.S. W.BallmerBals, A.A.BalsBanagiri, S.S.BanagiriBarayoga, J. C.J. C.BarayogaBarbieri, C.C.BarbieriBarclay, S. E.S. E.BarclayBarish, B. C.B. C.BarishBarker, D.D.BarkerBarkett, K.K.BarkettBarnum, S.S.BarnumBarone, F.F.BaroneBarr, B.B.BarrBarsotti, L.L.BarsottiBarsuglia, M.M.BarsugliaBarta, D.D.BartaBartlett, J.J.BartlettBartos, I.I.BartosBassiri, R.R.BassiriBasti, A.A.BastiBawaj, M.M.BawajBayley, J. C.J. C.BayleyBazzan, M.M.BazzanBécsy, B.B.BécsyBejger, M.M.BejgerBelahcene, I.I.BelahceneBell, A. S.A. S.BellBeniwal, D.D.BeniwalBenjamin, M. G.M. G.BenjaminBergmann, G.G.BergmannBernuzzi, S.S.BernuzziBerry, C. P.L.C. P.L.BerryBersanetti, D.D.BersanettiBertolini, A.A.BertoliniBetzwieser, J.J.BetzwieserBhandare, R.R.BhandareBidler, J.J.BidlerBiggs, E.E.BiggsBilenko, I. A.I. A.BilenkoBilgili, S. A.S. A.BilgiliBillingsley, G.G.BillingsleyBirney, R.R.BirneyBirnholtz, O.O.BirnholtzBiscans, S.S.BiscansBischi, M.M.BischiBiscoveanu, S.S.BiscoveanuBisht, A.A.BishtBitossi, M.M.Bitossi2025-08-312025-08-312020-04-1510.1103/PhysRevD.101.0840022-s2.0-85084593840https://d8.irins.org/handle/IITG2025/24177We present the results from a search for gravitational-wave transients associated with core-collapse supernovae observed within a source distance of approximately 20 Mpc during the first and second observing runs of Advanced LIGO and Advanced Virgo. No significant gravitational-wave candidate was detected. We report the detection efficiencies as a function of the distance for waveforms derived from multidimensional numerical simulations and phenomenological extreme emission models. The sources with neutrino-driven explosions are detectable at the distances approaching 5 kpc, and for magnetorotationally driven explosions the distances are up to 54 kpc. However, waveforms for extreme emission models are detectable up to 28 Mpc. For the first time, the gravitational-wave data enabled us to exclude part of the parameter spaces of two extreme emission models with confidence up to 83%, limited by coincident data coverage. Besides, using ad hoc harmonic signals windowed with Gaussian envelopes, we constrained the gravitational-wave energy emitted during core collapse at the levels of 4.27×10-4 M·c2 and 1.28×10-1 M·c2 for emissions at 235 and 1304 Hz, respectively. These constraints are 2 orders of magnitude more stringent than previously derived in the corresponding analysis using initial LIGO, initial Virgo, and GEO 600 data.falseArticlehttp://link.aps.org/pdf/10.1103/PhysRevD.101.0840022470002915 April 202089084002arJournal93