2020
DOI: 10.1103/physrevd.102.043015
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Abstract: We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO's and Virgo's third observing run. The signal was recorded on April 12, 2019 at 05∶30∶44 UTC with a network signal-to-noise ratio of 19. The binary is different from observations during the first two observing runs most notably due to its asymmetric masses: a ∼30 M ⊙ black hole merged with a ∼8 M ⊙ black hole companion. The more massive black hole rotated with a dimensionless spin magnitude … Show more

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Cited by 508 publications
(422 citation statements)
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References 228 publications
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“…Astrophysical source.-GW190521 is qualitatively different from previous detections [3,[6][7][8] due to the small number of cycles and maximum frequency in the sensitive band of the detectors. Hence, its astrophysical interpretation as a quasicircular compact binary merger warrants more discussion than previous events.…”
mentioning
confidence: 57%
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“…Astrophysical source.-GW190521 is qualitatively different from previous detections [3,[6][7][8] due to the small number of cycles and maximum frequency in the sensitive band of the detectors. Hence, its astrophysical interpretation as a quasicircular compact binary merger warrants more discussion than previous events.…”
mentioning
confidence: 57%
“…In their first two observing runs (O1 and O2), the LIGO Scientific Collaboration and the Virgo Collaboration (LVC) have reported the detection of GWs from 10 binary black hole (BH) mergers, and a binary neutron star inspiral [3,4]. The third observing run (O3) started on April 1, 2019, and was suspended on March 27, 2020; numerous public alerts pertaining to possible detections have been sent to the astronomical community [5], with three confirmed detections [6][7][8].…”
mentioning
confidence: 99%
“…The LIGO Scientific Collaboration and Virgo Collaboration (LVC) has so far announced 56 gravitational wave candidates on the GraceDB website, coupled with two gravitational wave events analyzed in detail [1,2]. GW190425, the first gravitational wave event announced in O3, is likely the second observed gravitational wave event of a binary neutron star (BNS) inspiral, with its distance much farther than that of GW170817 [3].…”
mentioning
confidence: 99%
“…In the context of GW data analysis, the luminosity distance and inclination angle of the source binary are usually degenerated, so it is usually difficult to accurately measure both parameters. This degeneracy may be changed by the existence of higher-order modes [2], for instance in GW190412. When using the binary black hole gravitational wave template containing higher-order modes for parameter estimation, the posterior probability distribution obtained (the green line) is significantly better than the result without higher-order modes (the blue line), breaking the V-shaped distribution.…”
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confidence: 99%
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