{"id":"W3122719773","doi":"10.1103/physrevd.104.022004","title":"Upper limits on the isotropic gravitational-wave background from Advanced LIGO and Advanced Virgo’s third observing run","year":2021,"lang":"en","type":"article","venue":"Physical review. D/Physical review. 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University of Tokyo; Cancéropôle Ile de France; National Astronomical Observatory of Japan; Ministry of Education, India; Conseil Régional, Île-de-France; Canada Foundation for Innovation; Fonds De La Recherche Scientifique - FNRS; Narodowe Centrum Nauki; Scottish Universities Physics Alliance; National Natural Science Foundation of China; National Research Foundation of Korea; Science and Technology Facilities Council; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung; Ministério da Ciência, Tecnologia e Inovação; Hungarian Scientific Research Fund; Generalitat de Catalunya; Generalitat Valenciana; Fonds Wetenschappelijk Onderzoek; Agence Nationale de la Recherche; Kavli Foundation; U.S. Department of Energy; Royal Society; Netherlands Organization for International Cooperation in Higher Education; Korea Institute of Science and Technology Information; Nederlandse Organisatie voor Wetenschappelijk Onderzoek; Ministry of Science and Technology of the People's Republic of China; Ministry of Education, Culture, Sports, Science and Technology; Council of Scientific and Industrial Research, India; National Research Council Canada; Fundacja na rzecz Nauki Polskiej; Academia Sinica; Abdus Salam International Centre for Theoretical Physics; Engineering and Physical Sciences Research Council; Leverhulme Trust; European Commission; Research Grants Council, University Grants Committee; Conselleria de Innovación, Universidades, Ciencia y Sociedad Digital, Generalitat Valenciana; Russian Foundation for Basic Research; Centres de Recerca de Catalunya; Institut des Origines de Lyon; Russian Science Foundation; Scottish Funding Council; Istituto Nazionale di Fisica Nucleare; Department of Science and Technology, Ministry of Science and Technology, India; National Science Foundation","keywords":"Physics; LIGO; Gravitational wave; Dimensionless quantity; Isotropy; Omega; Upper and lower bounds; Astrophysics; Computational physics; Optics; Quantum mechanics; Mathematical analysis; 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