Subtraction of correlated noise in global networks of gravitational-wave interferometers

作者：Coughlin Michael W; Christensen Nelson L; De Rosa Rosario; Fiori Irene; Golkowski Mark; Guidry Melissa; Harms Jan; Kubisz Jerzy; Kulak Andrzej; Mlynarczyk Janusz; Paoletti Federico; Thrane Eric

来源：Classical and Quantum Gravity, 2016, 33(22): 1-13.

DOI：10.1088/0264-9381/33/22/224003

• Schumann resonances
• correlated noise
• Wiener filter

The recent discovery of merging black holes suggests that a stochastic gravitational-wave background is within reach of the advanced detector network operating at design sensitivity. However, correlated magnetic noise from Schumann resonances threatens to contaminate observation of a stochastic background. In this paper, we report on the first effort to eliminate intercontinental correlated noise from Schumann resonances using Wiener filtering. Using magnetometers as proxies for gravitational-wave detectors, we demonstrate as much as a factor of two reduction in the coherence between magnetometers on different continents. While much work remains to be done, our results constitute a proof-of-principle and motivate follow-up studies with a dedicated array of magnetometers.

• 出版日期2016-11-17