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

Michael William Coughlin, Nelson L. Christensen, Rosario D De Rosa, Irene Fiori, Mark Gołkowski, Melissa Guidry, Jan Harms, Jerzy Kubisz, Andrzej Kulak, Janusz Mlynarczyk, Federico Paoletti, Eric Thrane

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18 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number224003
Number of pages13
JournalClassical and Quantum Gravity
Volume33
Issue number22
DOIs
Publication statusPublished - 26 Oct 2016

Keywords

  • correlated noise
  • Schumann resonances
  • Wiener filter

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