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

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

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

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 (US)
Article number224003
JournalClassical and Quantum Gravity
Volume33
Issue number22
DOIs
StatePublished - Oct 26 2016
Externally publishedYes

Bibliographical note

Funding Information:
MC is supported by the National Science Foundation Graduate Research Fellowship Program, under NSF grant number DGE 1144152. NC work is supported by NSF grant PHY-1505373. ET is supported through ARC FT150100281. We would like to acknowledge Luciano Papi for his assistance in the Villa Cristina measurements.

Keywords

  • Schumann resonances
  • Wiener filter
  • correlated noise

Fingerprint Dive into the research topics of 'Subtraction of correlated noise in global networks of gravitational-wave interferometers'. Together they form a unique fingerprint.

Cite this