期刊
PHYSICAL REVIEW D
卷 105, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.105.122001
关键词
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资金
- NSF's LIGO Laboratory - National Science Foundation
- Science and Technology Facilities Council (STFC) of the United Kingdom
- Max-Planck-Society (MPS)
- State of Niedersachsen/Germany
- Australian Research Council
- Italian Istituto Nazionale di Fisica Nucleare (INFN)
- Council of Scientific and Industrial Research of India
- Department of Science and Technology, India
- Science & Engineering Research Board (SERB), India
- Ministry of Human Resource Development, India
- Spanish Agencia Estatal de Investigacion (AEI)
- Spanish Ministerio de Ciencia e Innovacion
- Ministerio de Universidades
- Conselleria de Fons Europeus, Universitat i Cultura
- Direccio General de Politica Universitaria i Recerca del Govern de les Illes Balears
- Conselleria d'Innovacio, Universitats, Ciencia i Societat Digital de la Generalitat Valenciana
- CERCA Programme Generalitat de Catalunya, Spain
- National Science Centre of Poland
- European Union-European Regional Development Fund
- Foundation for Polish Science (FNP)
- Swiss National Science Foundation (SNSF)
- Russian Foundation for Basic Research
- Russian Science Foundation
- European Commission
- European Social Funds (ESF)
- European Regional Development Funds (ERDF)
- Royal Society
- Scottish Funding Council
- Scottish Universities Physics Alliance
- Hungarian Scientific Research Fund (OTKA)
- French Lyon Institute of Origins (LIO)
- Belgian Fonds de la Recherche Scientifique (FRS-FNRS)
- Actions de Recherche Concertees (ARC)
- Fonds Wetenschappelijk Onderzoek-Vlaanderen (FWO), Belgium
- Paris Ile-de-France Region
- National Research, Development and Innovation Office Hungary (NKFIH)
- National Research Foundation of Korea
- Natural Science and Engineering Research Council Canada
- Canadian Foundation for Innovation (CFI)
- Brazilian Ministry of Science, Technology, and Innovations
- International Center for Theoretical Physics South American Institute for Fundamental Research (ICTP-SAIFR)
- Research Grants Council of Hong Kong
- National Natural Science Foundation of China (NSFC)
- Leverhulme Trust
- Research Corporation
- Ministry of Science and Technology (MOST), Taiwan
- United States Department of Energy
- Kavli Foundation
- MEXT
- JSPS
- JSPS [26000005, JP17H06358, JP17H06361, JP17H06364, 17H06133, 20H05639, 20A203, JP20H05854]
- Institute for Cosmic Ray Research, University of Tokyo
- National Research Foundation (NRF)
- Computing Infrastructure Project of KISTI-GSDC in Korea
- Academia Sinica (AS)
- AS Grid Center (ASGC)
- Ministry of Science and Technology (MoST) in Taiwan [AS-CDA-105-M06]
- Advanced Technology Center (ATC) of NAOJ
- Mechanical Engineering Center of KEK
- French Centre National de la Recherche Scientifique (CNRS)
- Netherlands Organization for Scientific Research (NWO)
This study presents the first results from an all-sky all-frequency search for an anisotropic stochastic gravitational-wave background using data from the Advanced LIGO and Advanced Virgo detectors. No statistically significant evidence for narrowband gravitational-wave signals was found in the analyzed frequency range. Upper limits on the gravitational-wave strain were placed for each pixel-frequency pair with a 95% confidence level.
We present the first results from an all-sky all-frequency (ASAF) search for an anisotropic stochastic gravitational-wave background using the data from the first three observing runs of the Advanced LIGO and Advanced Virgo detectors. Upper limit maps on broadband anisotropies of a persistent stochastic background were published for all observing runs of the LIGO-Virgo detectors. However, a broadband analysis is likely to miss narrowband signals as the signal-to-noise ratio of a narrowband signal can be significantly reduced when combined with detector output from other frequencies. Data folding and the computationally efficient analysis pipeline, PyStoch, enable us to perform the radiometer map-making at every frequency bin. We perform the search at 3072 HEALPix equal area pixels uniformly tiling the sky and in every frequency bin of width 1/32 Hz in the range 20-1726 Hz, except for bins that are likely to contain instrumental artefacts and hence are notched. We do not find any statistically significant evidence for the existence of narrowband gravitational-wave signals in the analyzed frequency bins. Therefore, we place 95% confidence upper limits on the gravitational-wave strain for each pixel-frequency pair, the limits are in the range (0.030-9.6) x 10(-24). In addition, we outline a method to identify candidate pixelfrequency pairs that could be followed up by a more sensitive (and potentially computationally expensive) search, e.g., a matched-filtering-based analysis, to look for fainter nearly monochromatic coherent signals. The ASAF analysis is inherently independent of models describing any spectral or spatial distribution of power. We demonstrate that the ASAF results can be appropriately combined over frequencies and sky directions to successfully recover the broadband directional and isotropic results.
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