Soares-Santos, M.M.Soares-SantosPalmese, A.A.PalmeseHartley, W.W.HartleyAnnis, J.J.AnnisGarcia-Bellido, J.J.Garcia-BellidoLahav, O.O.LahavDoctor, Z.Z.DoctorFishbach, M.M.FishbachHolz, D. E.D. E.HolzLin, H.H.LinPereira, M. E.S.M. E.S.PereiraGarcia, A.A.GarciaHerner, K.K.HernerKessler, R.R.KesslerPeiris, H. V.H. V.PeirisSako, M.M.SakoAllam, S.S.AllamBrout, D.D.BroutRosell, A. CarneroA. CarneroRosellChen, H. Y.H. Y.ChenConselice, C.C.ConseliceDerose, J.J.DeroseDevicente, J.J.DevicenteDiehl, H. T.H. T.DiehlGill, M. S.S.M. S.S.GillGschwend, J.J.GschwendSevilla-Noarbe, I.I.Sevilla-NoarbeTucker, D. L.D. L.TuckerWechsler, R.R.WechslerBerger, E.E.BergerCowperthwaite, P. S.P. S.CowperthwaiteMetzger, B. D.B. D.MetzgerWilliams, P. K.G.P. K.G.WilliamsAbbott, T. M.C.T. M.C.AbbottAbdalla, F. B.F. B.AbdallaAvila, S.S.AvilaBechtol, K.K.BechtolBertin, E.E.BertinBrooks, D.D.BrooksBuckley-Geer, E.E.Buckley-GeerBurke, D. L.D. L.BurkeKind, M. CarrascoM. CarrascoKindCarretero, J.J.CarreteroCastander, F. J.F. J.CastanderCrocce, M.M.CrocceCunha, C. E.C. E.CunhaD'andrea, C. B.C. B.D'andreaDa Costa, L. N.L. N.Da CostaDavis, C.C.DavisDesai, S.S.DesaiDoel, P.P.DoelDrlica-Wagner, A.A.Drlica-WagnerEifler, T. F.T. F.EiflerEvrard, A. E.A. E.EvrardFlaugher, B.B.FlaugherFosalba, P.P.FosalbaFrieman, J.J.FriemanGaztanaga, E.E.GaztanagaGerdes, D. W.D. W.GerdesGruen, D.D.GruenGruendl, R. A.R. A.GruendlGutierrez, G.G.GutierrezHollowood, D. L.D. L.HollowoodHoyle, B.B.HoyleJames, D. J.D. J.JamesJeltema, T.T.JeltemaKuehn, K.K.KuehnKuropatkin, N.N.KuropatkinLi, T. S.T. S.LiLima, M.M.LimaMaia, M. A.G.M. A.G.MaiaMarshall, J. L.J. L.MarshallMenanteau, F.F.MenanteauMiquel, R.R.MiquelNeilsen, E.E.NeilsenOgando, R. L.C.R. L.C.OgandoPlazas, A. A.A. A.PlazasRomer, A. K.A. K.RomerRoodman, A.A.RoodmanSanchez, E.E.SanchezScarpine, V.V.ScarpineSchindler, R.R.SchindlerSchubnell, M.M.SchubnellSerrano, S.S.SerranoSmith, M.M.SmithSmith, R. C.R. C.SmithSobreira, F.F.SobreiraSuchyta, E.E.SuchytaSwanson, M. E.C.M. E.C.SwansonTarle, G.G.TarleThomas, R. C.R. C.ThomasWalker, A. R.A. R.WalkerWester, W.W.WesterZuntz, J.J.ZuntzAbbott, B. P.B. P.AbbottAbbott, R.R.AbbottAbbott, T. D.T. D.AbbottAbraham, S.S.AbrahamAcernese, F.F.AcerneseAckley, K.K.Ackley2025-08-312025-08-312019-05-0110.3847/2041-8213/ab14f12-s2.0-85067276464https://d8.irins.org/handle/IITG2025/23302We present a multi-messenger measurement of the Hubble constant H <inf>0</inf> using the binary-black-hole merger GW170814 as a standard siren, combined with a photometric redshift catalog from the Dark Energy Survey (DES). The luminosity distance is obtained from the gravitational wave signal detected by the Laser Interferometer Gravitational-Wave Observatory (LIGO)/Virgo Collaboration (LVC) on 2017 August 14, and the redshift information is provided by the DES Year 3 data. Black hole mergers such as GW170814 are expected to lack bright electromagnetic emission to uniquely identify their host galaxies and build an object-by-object Hubble diagram. However, they are suitable for a statistical measurement, provided that a galaxy catalog of adequate depth and redshift completion is available. Here we present the first Hubble parameter measurement using a black hole merger. Our analysis results in , which is consistent with both SN Ia and cosmic microwave background measurements of the Hubble constant. The quoted 68% credible region comprises 60% of the uniform prior range [20, 140] km s^-1 Mpc^-1, and it depends on the assumed prior range. If we take a broader prior of [10, 220] km s^-1 Mpc^-1, we find (57% of the prior range). Although a weak constraint on the Hubble constant from a single event is expected using the dark siren method, a multifold increase in the LVC event rate is anticipated in the coming years and combinations of many sirens will lead to improved constraints on H <inf>0</inf>.trueArticlehttps://iopscience.iop.org/article/10.3847/2041-8213/ab14f1/pdf204182131 May 2019213L7arJournal218