Properties of the Binary Black Hole Merger GW150914
Affiliations
- 1 LIGO, California Institute of Technology, Pasadena, California 91125, USA.
- 2 Louisiana State University, Baton Rouge, Louisiana 70803, USA.
- 3 Università di Salerno, Fisciano, I-84084 Salerno, Italy.
- 4 INFN, Sezione di Napoli, Complesso Universitario di Monte S.Angelo, I-80126 Napoli, Italy.
- 5 University of Florida, Gainesville, Florida 32611, USA.
- 6 LIGO Livingston Observatory, Livingston, Louisiana 70754, USA.
- 7 Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France.
- 8 Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik, D-30167 Hannover, Germany.
- 9 Nikhef, Science Park, 1098 XG Amsterdam, Netherlands.
- 10 LIGO, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
- 11 Instituto Nacional de Pesquisas Espaciais, 12227-010 São José dos Campos, São Paulo, Brazil.
- 12 INFN, Gran Sasso Science Institute, I-67100 L'Aquila, Italy.
- 13 INFN, Sezione di Roma Tor Vergata, I-00133 Roma, Italy.
- 14 Inter-University Centre for Astronomy and Astrophysics, Pune 411007, India.
- 15 International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Bangalore 560012, India.
- 16 University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, USA.
- 17 Leibniz Universität Hannover, D-30167 Hannover, Germany.
- 18 Università di Pisa, I-56127 Pisa, Italy.
- 19 INFN, Sezione di Pisa, I-56127 Pisa, Italy.
- 20 Australian National University, Canberra, Australian Capital Territory 0200, Australia.
- 21 The University of Mississippi, University, Mississippi 38677, USA.
- 22 California State University Fullerton, Fullerton, California 92831, USA.
- 23 LAL, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91400 Orsay, France.
- 24 Chennai Mathematical Institute, Chennai 603103, India.
- 25 Università di Roma Tor Vergata, I-00133 Roma, Italy.
- 26 University of Southampton, Southampton SO17 1BJ, United Kingdom.
- 27 Universität Hamburg, D-22761 Hamburg, Germany.
- 28 INFN, Sezione di Roma, I-00185 Roma, Italy.
- 29 Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik, D-14476 Potsdam-Golm, Germany.
- 30 APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, France.
- 31 Montana State University, Bozeman, Montana 59717, USA.
- 32 Università di Perugia, I-06123 Perugia, Italy.
- 33 INFN, Sezione di Perugia, I-06123 Perugia, Italy.
- 34 European Gravitational Observatory (EGO), I-56021 Cascina, Pisa, Italy.
- 35 Syracuse University, Syracuse, New York 13244, USA.
- 36 SUPA, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
- 37 LIGO Hanford Observatory, Richland, Washington 99352, USA.
- 38 Wigner RCP, RMKI, H-1121 Budapest, Konkoly Thege Miklós út 29-33, Hungary.
- 39 Columbia University, New York, New York 10027, USA.
- 40 Stanford University, Stanford, California 94305, USA.
- 41 Università di Padova, Dipartimento di Fisica e Astronomia, I-35131 Padova, Italy.
- 42 INFN, Sezione di Padova, I-35131 Padova, Italy.
- 43 CAMK-PAN, 00-716 Warsaw, Poland.
- 44 University of Birmingham, Birmingham B15 2TT, United Kingdom.
- 45 Università degli Studi di Genova, I-16146 Genova, Italy.
- 46 INFN, Sezione di Genova, I-16146 Genova, Italy.
- 47 RRCAT, Indore, Madhya Pradesh 452013, India.
- 48 Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia.
- 49 SUPA, University of the West of Scotland, Paisley PA1 2BE, United Kingdom.
- 50 University of Western Australia, Crawley, Western Australia 6009, Australia.
- 51 Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, Netherlands.
- 52 Artemis, Université Côte d'Azur, CNRS, Observatoire Côte d'Azur, CS 34229, Nice cedex 4, France.
- 53 MTA Eötvös University, "Lendulet" Astrophysics Research Group, Budapest 1117, Hungary.
- 54 Institut de Physique de Rennes, CNRS, Université de Rennes 1, F-35042 Rennes, France.
- 55 Washington State University, Pullman, Washington 99164, USA.
- 56 Università degli Studi di Urbino "Carlo Bo", I-61029 Urbino, Italy.
- 57 INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Firenze, Italy.
- 58 University of Oregon, Eugene, Oregon 97403, USA.
- 59 Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France, F-75005 Paris, France.
- 60 Astronomical Observatory Warsaw University, 00-478 Warsaw, Poland.
- 61 VU University Amsterdam, 1081 HV Amsterdam, Netherlands.
- 62 University of Maryland, College Park, Maryland 20742, USA.
- 63 Center for Relativistic Astrophysics and School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
- 64 Institut Lumière Matière, Université de Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5306, 69622 Villeurbanne, France.
- 65 Laboratoire des Matériaux Avancés (LMA), IN2P3/CNRS, Université de Lyon, F-69622 Villeurbanne, Lyon, France.
- 66 Universitat de les Illes Balears, IAC3-IEEC, E-07122 Palma de Mallorca, Spain.
- 67 Università di Napoli "Federico II", Complesso Universitario di Monte S.Angelo, I-80126 Napoli, Italy.
- 68 NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
- 69 Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, Ontario M5S 3H8, Canada.
- 70 Tsinghua University, Beijing 100084, China.
- 71 Texas Tech University, Lubbock, Texas 79409, USA.
- 72 The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
- 73 National Tsing Hua University, Hsinchu City, 30013 Taiwan, Republic of China.
- 74 Charles Sturt University, Wagga Wagga, New South Wales 2678, Australia.
- 75 University of Chicago, Chicago, Illinois 60637, USA.
- 76 Caltech CaRT, Pasadena, California 91125, USA.
- 77 Korea Institute of Science and Technology Information, Daejeon 305-806, Korea.
- 78 Carleton College, Northfield, Minnesota 55057, USA.
- 79 Università di Roma "La Sapienza", I-00185 Roma, Italy.
- 80 University of Brussels, Brussels 1050, Belgium.
- 81 Sonoma State University, Rohnert Park, California 94928, USA.
- 82 Northwestern University, Evanston, Illinois 60208, USA.
- 83 University of Minnesota, Minneapolis, Minneapolis 55455, USA.
- 84 The University of Melbourne, Parkville, Victoria 3010, Australia.
- 85 The University of Texas Rio Grande Valley, Brownsville, Texas 78520, USA.
- 86 The University of Sheffield, Sheffield S10 2TN, United Kingdom.
- 87 University of Sannio at Benevento, I-82100 Benevento, Italy and INFN, Sezione di Napoli, I-80100 Napoli, Italy.
- 88 West Virginia University, Morgantown, West Virginia 26506, USA.
- 89 Montclair State University, Montclair, New Jersey 07043, USA.
- 90 Università di Trento, Dipartimento di Fisica, I-38123 Povo, Trento, Italy.
- 91 INFN, Trento Institute for Fundamental Physics and Applications, I-38123 Povo, Trento, Italy.
- 92 Cardiff University, Cardiff CF24 3AA, United Kingdom.
- 93 National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
- 94 School of Mathematics, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
- 95 Indian Institute of Technology, Gandhinagar Ahmedabad Gujarat 382424, India.
- 96 Institute for Plasma Research, Bhat, Gandhinagar 382428, India.
- 97 University of Szeged, Dóm tér 9, Szeged 6720, Hungary.
- 98 Embry-Riddle Aeronautical University, Prescott, Arizona 86301, USA.
- 99 University of Michigan, Ann Arbor, Michigan 48109, USA.
- 100 Tata Institute of Fundamental Research, Mumbai 400005, India.
- 101 American University, Washington, D.C. 20016, USA.
- 102 Rochester Institute of Technology, Rochester, New York 14623, USA.
- 103 University of Massachusetts-Amherst, Amherst, Massachusetts 01003, USA.
- 104 University of Adelaide, Adelaide, South Australia 5005, Australia.
- 105 University of Białystok, 15-424 Biał ystok, Poland.
- 106 SUPA, University of Strathclyde, Glasgow G1 1XQ, United Kingdom.
- 107 IISER-TVM, CET Campus, Trivandrum Kerala 695016, India.
- 108 Institute of Applied Physics, Nizhny Novgorod, 603950, Russia.
- 109 Pusan National University, Busan 609-735, Korea.
- 110 Hanyang University, Seoul 133-791, Korea.
- 111 NCBJ, 05-400 Świerk-Otwock, Poland.
- 112 IM-PAN, 00-956 Warsaw, Poland.
- 113 Monash University, Victoria 3800, Australia.
- 114 Seoul National University, Seoul 151-742, Korea.
- 115 University of Alabama in Huntsville, Huntsville, Alabama 35899, USA.
- 116 ESPCI, CNRS, F-75005 Paris, France.
- 117 Università di Camerino, Dipartimento di Fisica, I-62032 Camerino, Italy.
- 118 Southern University and A&M College, Baton Rouge, Louisiana 70813, USA.
- 119 College of William and Mary, Williamsburg, Virginia 23187, USA.
- 120 Instituto de Física Teórica, University Estadual Paulista/ICTP South American Institute for Fundamental Research, São Paulo, São Paulo 01140-070, Brazil.
- 121 University of Cambridge, Cambridge CB2 1TN, United Kingdom.
- 122 IISER-Kolkata, Mohanpur, West Bengal 741252, India.
- 123 Rutherford Appleton Laboratory, HSIC, Chilton, Didcot, Oxon OX11 0QX, United Kingdom.
- 124 Whitman College, 345 Boyer Avenue, Walla Walla, Washington 99362 USA.
- 125 National Institute for Mathematical Sciences, Daejeon 305-390, Korea.
- 126 Hobart and William Smith Colleges, Geneva, New York 14456, USA.
- 127 Janusz Gil Institute of Astronomy, University of Zielona Góra, 65-265 Zielona Góra, Poland.
- 128 Andrews University, Berrien Springs, Michigan 49104, USA.
- 129 Università di Siena, I-53100 Siena, Italy.
- 130 Trinity University, San Antonio, Texas 78212, USA.
- 131 University of Washington, Seattle, Washington 98195, USA.
- 132 Kenyon College, Gambier, Ohio 43022, USA.
- 133 Abilene Christian University, Abilene, Texas 79699, USA.
- 134 Cornell University, Ithaca, New York 14853, USA.
- 135 Theoretical Physics Institute, University of Jena, 07743 Jena, Germany.
- 136 Caltech JPL, Pasadena, California 91109, USA.
- PMID: 27367378
- DOI: 10.1103/PhysRevLett.116.241102
Properties of the Binary Black Hole Merger GW150914
Authors
Affiliations
- 1 LIGO, California Institute of Technology, Pasadena, California 91125, USA.
- 2 Louisiana State University, Baton Rouge, Louisiana 70803, USA.
- 3 Università di Salerno, Fisciano, I-84084 Salerno, Italy.
- 4 INFN, Sezione di Napoli, Complesso Universitario di Monte S.Angelo, I-80126 Napoli, Italy.
- 5 University of Florida, Gainesville, Florida 32611, USA.
- 6 LIGO Livingston Observatory, Livingston, Louisiana 70754, USA.
- 7 Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France.
- 8 Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik, D-30167 Hannover, Germany.
- 9 Nikhef, Science Park, 1098 XG Amsterdam, Netherlands.
- 10 LIGO, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
- 11 Instituto Nacional de Pesquisas Espaciais, 12227-010 São José dos Campos, São Paulo, Brazil.
- 12 INFN, Gran Sasso Science Institute, I-67100 L'Aquila, Italy.
- 13 INFN, Sezione di Roma Tor Vergata, I-00133 Roma, Italy.
- 14 Inter-University Centre for Astronomy and Astrophysics, Pune 411007, India.
- 15 International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Bangalore 560012, India.
- 16 University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, USA.
- 17 Leibniz Universität Hannover, D-30167 Hannover, Germany.
- 18 Università di Pisa, I-56127 Pisa, Italy.
- 19 INFN, Sezione di Pisa, I-56127 Pisa, Italy.
- 20 Australian National University, Canberra, Australian Capital Territory 0200, Australia.
- 21 The University of Mississippi, University, Mississippi 38677, USA.
- 22 California State University Fullerton, Fullerton, California 92831, USA.
- 23 LAL, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91400 Orsay, France.
- 24 Chennai Mathematical Institute, Chennai 603103, India.
- 25 Università di Roma Tor Vergata, I-00133 Roma, Italy.
- 26 University of Southampton, Southampton SO17 1BJ, United Kingdom.
- 27 Universität Hamburg, D-22761 Hamburg, Germany.
- 28 INFN, Sezione di Roma, I-00185 Roma, Italy.
- 29 Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik, D-14476 Potsdam-Golm, Germany.
- 30 APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, France.
- 31 Montana State University, Bozeman, Montana 59717, USA.
- 32 Università di Perugia, I-06123 Perugia, Italy.
- 33 INFN, Sezione di Perugia, I-06123 Perugia, Italy.
- 34 European Gravitational Observatory (EGO), I-56021 Cascina, Pisa, Italy.
- 35 Syracuse University, Syracuse, New York 13244, USA.
- 36 SUPA, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
- 37 LIGO Hanford Observatory, Richland, Washington 99352, USA.
- 38 Wigner RCP, RMKI, H-1121 Budapest, Konkoly Thege Miklós út 29-33, Hungary.
- 39 Columbia University, New York, New York 10027, USA.
- 40 Stanford University, Stanford, California 94305, USA.
- 41 Università di Padova, Dipartimento di Fisica e Astronomia, I-35131 Padova, Italy.
- 42 INFN, Sezione di Padova, I-35131 Padova, Italy.
- 43 CAMK-PAN, 00-716 Warsaw, Poland.
- 44 University of Birmingham, Birmingham B15 2TT, United Kingdom.
- 45 Università degli Studi di Genova, I-16146 Genova, Italy.
- 46 INFN, Sezione di Genova, I-16146 Genova, Italy.
- 47 RRCAT, Indore, Madhya Pradesh 452013, India.
- 48 Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia.
- 49 SUPA, University of the West of Scotland, Paisley PA1 2BE, United Kingdom.
- 50 University of Western Australia, Crawley, Western Australia 6009, Australia.
- 51 Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, Netherlands.
- 52 Artemis, Université Côte d'Azur, CNRS, Observatoire Côte d'Azur, CS 34229, Nice cedex 4, France.
- 53 MTA Eötvös University, "Lendulet" Astrophysics Research Group, Budapest 1117, Hungary.
- 54 Institut de Physique de Rennes, CNRS, Université de Rennes 1, F-35042 Rennes, France.
- 55 Washington State University, Pullman, Washington 99164, USA.
- 56 Università degli Studi di Urbino "Carlo Bo", I-61029 Urbino, Italy.
- 57 INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Firenze, Italy.
- 58 University of Oregon, Eugene, Oregon 97403, USA.
- 59 Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France, F-75005 Paris, France.
- 60 Astronomical Observatory Warsaw University, 00-478 Warsaw, Poland.
- 61 VU University Amsterdam, 1081 HV Amsterdam, Netherlands.
- 62 University of Maryland, College Park, Maryland 20742, USA.
- 63 Center for Relativistic Astrophysics and School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
- 64 Institut Lumière Matière, Université de Lyon, Université Claude Bernard Lyon 1, UMR CNRS 5306, 69622 Villeurbanne, France.
- 65 Laboratoire des Matériaux Avancés (LMA), IN2P3/CNRS, Université de Lyon, F-69622 Villeurbanne, Lyon, France.
- 66 Universitat de les Illes Balears, IAC3-IEEC, E-07122 Palma de Mallorca, Spain.
- 67 Università di Napoli "Federico II", Complesso Universitario di Monte S.Angelo, I-80126 Napoli, Italy.
- 68 NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
- 69 Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, Ontario M5S 3H8, Canada.
- 70 Tsinghua University, Beijing 100084, China.
- 71 Texas Tech University, Lubbock, Texas 79409, USA.
- 72 The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
- 73 National Tsing Hua University, Hsinchu City, 30013 Taiwan, Republic of China.
- 74 Charles Sturt University, Wagga Wagga, New South Wales 2678, Australia.
- 75 University of Chicago, Chicago, Illinois 60637, USA.
- 76 Caltech CaRT, Pasadena, California 91125, USA.
- 77 Korea Institute of Science and Technology Information, Daejeon 305-806, Korea.
- 78 Carleton College, Northfield, Minnesota 55057, USA.
- 79 Università di Roma "La Sapienza", I-00185 Roma, Italy.
- 80 University of Brussels, Brussels 1050, Belgium.
- 81 Sonoma State University, Rohnert Park, California 94928, USA.
- 82 Northwestern University, Evanston, Illinois 60208, USA.
- 83 University of Minnesota, Minneapolis, Minneapolis 55455, USA.
- 84 The University of Melbourne, Parkville, Victoria 3010, Australia.
- 85 The University of Texas Rio Grande Valley, Brownsville, Texas 78520, USA.
- 86 The University of Sheffield, Sheffield S10 2TN, United Kingdom.
- 87 University of Sannio at Benevento, I-82100 Benevento, Italy and INFN, Sezione di Napoli, I-80100 Napoli, Italy.
- 88 West Virginia University, Morgantown, West Virginia 26506, USA.
- 89 Montclair State University, Montclair, New Jersey 07043, USA.
- 90 Università di Trento, Dipartimento di Fisica, I-38123 Povo, Trento, Italy.
- 91 INFN, Trento Institute for Fundamental Physics and Applications, I-38123 Povo, Trento, Italy.
- 92 Cardiff University, Cardiff CF24 3AA, United Kingdom.
- 93 National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
- 94 School of Mathematics, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
- 95 Indian Institute of Technology, Gandhinagar Ahmedabad Gujarat 382424, India.
- 96 Institute for Plasma Research, Bhat, Gandhinagar 382428, India.
- 97 University of Szeged, Dóm tér 9, Szeged 6720, Hungary.
- 98 Embry-Riddle Aeronautical University, Prescott, Arizona 86301, USA.
- 99 University of Michigan, Ann Arbor, Michigan 48109, USA.
- 100 Tata Institute of Fundamental Research, Mumbai 400005, India.
- 101 American University, Washington, D.C. 20016, USA.
- 102 Rochester Institute of Technology, Rochester, New York 14623, USA.
- 103 University of Massachusetts-Amherst, Amherst, Massachusetts 01003, USA.
- 104 University of Adelaide, Adelaide, South Australia 5005, Australia.
- 105 University of Białystok, 15-424 Biał ystok, Poland.
- 106 SUPA, University of Strathclyde, Glasgow G1 1XQ, United Kingdom.
- 107 IISER-TVM, CET Campus, Trivandrum Kerala 695016, India.
- 108 Institute of Applied Physics, Nizhny Novgorod, 603950, Russia.
- 109 Pusan National University, Busan 609-735, Korea.
- 110 Hanyang University, Seoul 133-791, Korea.
- 111 NCBJ, 05-400 Świerk-Otwock, Poland.
- 112 IM-PAN, 00-956 Warsaw, Poland.
- 113 Monash University, Victoria 3800, Australia.
- 114 Seoul National University, Seoul 151-742, Korea.
- 115 University of Alabama in Huntsville, Huntsville, Alabama 35899, USA.
- 116 ESPCI, CNRS, F-75005 Paris, France.
- 117 Università di Camerino, Dipartimento di Fisica, I-62032 Camerino, Italy.
- 118 Southern University and A&M College, Baton Rouge, Louisiana 70813, USA.
- 119 College of William and Mary, Williamsburg, Virginia 23187, USA.
- 120 Instituto de Física Teórica, University Estadual Paulista/ICTP South American Institute for Fundamental Research, São Paulo, São Paulo 01140-070, Brazil.
- 121 University of Cambridge, Cambridge CB2 1TN, United Kingdom.
- 122 IISER-Kolkata, Mohanpur, West Bengal 741252, India.
- 123 Rutherford Appleton Laboratory, HSIC, Chilton, Didcot, Oxon OX11 0QX, United Kingdom.
- 124 Whitman College, 345 Boyer Avenue, Walla Walla, Washington 99362 USA.
- 125 National Institute for Mathematical Sciences, Daejeon 305-390, Korea.
- 126 Hobart and William Smith Colleges, Geneva, New York 14456, USA.
- 127 Janusz Gil Institute of Astronomy, University of Zielona Góra, 65-265 Zielona Góra, Poland.
- 128 Andrews University, Berrien Springs, Michigan 49104, USA.
- 129 Università di Siena, I-53100 Siena, Italy.
- 130 Trinity University, San Antonio, Texas 78212, USA.
- 131 University of Washington, Seattle, Washington 98195, USA.
- 132 Kenyon College, Gambier, Ohio 43022, USA.
- 133 Abilene Christian University, Abilene, Texas 79699, USA.
- 134 Cornell University, Ithaca, New York 14853, USA.
- 135 Theoretical Physics Institute, University of Jena, 07743 Jena, Germany.
- 136 Caltech JPL, Pasadena, California 91109, USA.
- PMID: 27367378
- DOI: 10.1103/PhysRevLett.116.241102
Abstract
On September 14, 2015, the Laser Interferometer Gravitational-Wave Observatory (LIGO) detected a gravitational-wave transient (GW150914); we characterize the properties of the source and its parameters. The data around the time of the event were analyzed coherently across the LIGO network using a suite of accurate waveform models that describe gravitational waves from a compact binary system in general relativity. GW150914 was produced by a nearly equal mass binary black hole of masses 36_{-4}^{+5}M_{⊙} and 29_{-4}^{+4}M_{⊙}; for each parameter we report the median value and the range of the 90% credible interval. The dimensionless spin magnitude of the more massive black hole is bound to be <0.7 (at 90% probability). The luminosity distance to the source is 410_{-180}^{+160} Mpc, corresponding to a redshift 0.09_{-0.04}^{+0.03} assuming standard cosmology. The source location is constrained to an annulus section of 610 deg^{2}, primarily in the southern hemisphere. The binary merges into a black hole of mass 62_{-4}^{+4}M_{⊙} and spin 0.67_{-0.07}^{+0.05}. This black hole is significantly more massive than any other inferred from electromagnetic observations in the stellar-mass regime.
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