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[Submitted on 29 Jul 2026 ( v1 ), last revised 29 Oct 2026 (this version, v2)] Title:Bayesian nonparametric estimation of correlated gravitational wave detector network noise using matrix-gamma process priors View a PDF of the paper titled Bayesian nonparametric estimation of correlated gravitational wave detector network noise using matrix-gamma process priors, by Yixuan Liu and Renate Meyer and Nelson Christensen and Jeung Eun Lee and Jianan Liu and Patricio Maturana-Russel and Avi Vajpeyi...
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Abstract The new era of gravitational wave astronomy truly began on September 14, 2015, with the detection of GW150914, the sensational first direct observation of gravitational waves from the inspiral and merger of two black holes by the two Advanced LIGO detectors. In the subsequent first three observing runs of the LIGO-Virgo network, gravitational waves from ∼50 compact binary mergers have been announced, with more results to come.
A stochastic background of gravitational waves could be created by the superposition of a large number of independent sources. The physical processes occurring at the earliest moments of the universe certainly created a stochastic background that exists, at some level, today. This is analogous to the cosmic microwave background, which is an electromagnetic record of the early universe.
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