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 language | English (US) |
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Article number | 224003 |
Journal | Classical and Quantum Gravity |
Volume | 33 |
Issue number | 22 |
DOIs | |
State | Published - Oct 26 2016 |
Externally published | Yes |
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.
Publisher Copyright:
© 2016 IOP Publishing Ltd.
Keywords
- Schumann resonances
- Wiener filter
- correlated noise