TY - JOUR
T1 - Measurement and subtraction of Schumann resonances at gravitational-wave interferometers
AU - Coughlin, Michael W.
AU - Cirone, Alessio
AU - Meyers, Patrick
AU - Atsuta, Sho
AU - Boschi, Valerio
AU - Chincarini, Andrea
AU - Christensen, Nelson L.
AU - De Rosa, Rosario
AU - Effler, Anamaria
AU - Fiori, Irene
AU - Gołkowski, Mark
AU - Guidry, Melissa
AU - Harms, Jan
AU - Hayama, Kazuhiro
AU - Kataoka, Yuu
AU - Kubisz, Jerzy
AU - Kulak, Andrzej
AU - Laxen, Michael
AU - Matas, Andrew
AU - Mlynarczyk, Janusz
AU - Ogawa, Tsutomu
AU - Paoletti, Federico
AU - Salvador, Jacobo
AU - Schofield, Robert
AU - Somiya, Kentaro
AU - Thrane, Eric
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/5/15
Y1 - 2018/5/15
N2 - Correlated magnetic noise from Schumann resonances threatens to contaminate the observation of a stochastic gravitational-wave background in interferometric detectors. In previous work, we reported on the first effort to eliminate global correlated noise from the Schumann resonances using Wiener filtering, demonstrating as much as a factor of two reduction in the coherence between magnetometers on different continents. In this work, we present results from dedicated magnetometer measurements at the Virgo and KAGRA sites, which are the first results for subtraction using data from gravitational-wave detector sites. We compare these measurements to a growing network of permanent magnetometer stations, including at the LIGO sites. We show the effect of mutual magnetometer attraction, arguing that magnetometers should be placed at least one meter from one another. In addition, for the first time, we show how dedicated measurements by magnetometers near to the interferometers can reduce coherence to a level consistent with uncorrelated noise, making a potential detection of a stochastic gravitational-wave background possible.
AB - Correlated magnetic noise from Schumann resonances threatens to contaminate the observation of a stochastic gravitational-wave background in interferometric detectors. In previous work, we reported on the first effort to eliminate global correlated noise from the Schumann resonances using Wiener filtering, demonstrating as much as a factor of two reduction in the coherence between magnetometers on different continents. In this work, we present results from dedicated magnetometer measurements at the Virgo and KAGRA sites, which are the first results for subtraction using data from gravitational-wave detector sites. We compare these measurements to a growing network of permanent magnetometer stations, including at the LIGO sites. We show the effect of mutual magnetometer attraction, arguing that magnetometers should be placed at least one meter from one another. In addition, for the first time, we show how dedicated measurements by magnetometers near to the interferometers can reduce coherence to a level consistent with uncorrelated noise, making a potential detection of a stochastic gravitational-wave background possible.
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U2 - 10.1103/PhysRevD.97.102007
DO - 10.1103/PhysRevD.97.102007
M3 - Article
AN - SCOPUS:85048095492
SN - 2470-0010
VL - 97
JO - Physical Review D
JF - Physical Review D
IS - 10
M1 - 102007
ER -