@article{2f35f652dd2944cf945dabde91b28f07,
title = "Noise subtraction from KAGRA O3GK data using Independent Component Analysis",
abstract = "During April 7–21 2020, KAGRA conducted its first scientific observation in conjunction with the GEO600 detector. The dominant noise sources during this run were found to be suspension control noise in the low-frequency range and acoustic noise in the mid-frequency range. In this study, we show that their contributions in the observational data can be reduced by a signal processing method called independent component analysis (ICA). The model of ICA is extended from that studied in the initial KAGRA data analysis to account for frequency dependence, while the linearity and stationarity of the coupling between the interferometer and the noise sources are still assumed. We identify optimal witness sensors in the application of ICA, leading to successful mitigation of these two dominant contributions. We also analyze the stability of the transfer functions for the entire two weeks of data to investigate the applicability of the proposed subtraction method in gravitational wave searches.",
keywords = "data analysis, gravitational wave, independent component analysis, noise subtraction",
author = "{the KAGRA Collaboration} and H. Abe and T. Akutsu and M. Ando and A. Araya and N. Aritomi and H. Asada and Y. Aso and S. Bae and Y. Bae and R. Bajpai and K. Cannon and Z. Cao and E. Capocasa and M. Chan and C. Chen and D. Chen and K. Chen and Y. Chen and Chiang, {C. Y.} and Chu, {Y. K.} and S. Eguchi and M. Eisenmann and Y. Enomoto and R. Flaminio and Fong, {H. K.} and Y. Fujii and Y. Fujikawa and Y. Fujimoto and I. Fukunaga and D. Gao and Ge, {G. G.} and S. Ha and Hadiputrawan, {I. P.W.} and S. Haino and Han, {W. B.} and K. Hasegawa and K. Hattori and H. Hayakawa and K. Hayama and Y. Himemoto and N. Hirata and C. Hirose and Ho, {T. C.} and Hsieh, {B. H.} and Hsieh, {H. F.} and C. Hsiung and Huang, {H. Y.} and P. Huang and Huang, {Y. C.} and C. Kim",
note = "Funding Information: This work was supported by MEXT, JSPS Leading-edge Research Infrastructure Program, JSPS Grant-in-Aid for Specially Promoted Research 26000005, JSPS Grant-inAid for Scientific Research on Innovative Areas 2905: JP17H06358, JP17H06361 and JP17H06364, JSPS Core-to-Core Program A. Advanced Research Networks, JSPS Grantin-Aid for Scientific Research (S) 17H06133 and 20H05639, JSPS Grant-in-Aid for Transformative Research Areas (A) 20A203: JP20H05854, the joint research program of the Institute for Cosmic Ray Research, University of Tokyo, National Research Foundation (NRF), Computing Infrastructure Project of Global Science experimental Data hub Center (GSDC) at KISTI, Korea Astronomy and Space Science Institute (KASI), and Ministry of Science and ICT (MSIT) in Korea, Academia Sinica (AS), AS Grid Center (ASGC) and the National Science and Technology Council (NSTC) in Taiwan under grants including the Rising Star Program and Science Vanguard Research Program, Advanced Technology Center (ATC) of NAOJ, and Mechanical Engineering Center of KEK. Funding Information: This work was partially supported by JSPS KAKENHI, Grant Numbers JP20J21866 (J K), 19J01299 and 20H05256 (T W). J K was supported by Leading Graduate Course for Frontiers of Mathematical Sciences and Physics (FMSP). The authors would like to thank Editage ( www.editage.com ) for English language editing. Publisher Copyright: {\textcopyright} 2023 IOP Publishing Ltd.",
year = "2023",
month = apr,
day = "20",
doi = "10.1088/1361-6382/acc0cb",
language = "English",
volume = "40",
journal = "Classical and Quantum Gravity",
issn = "0264-9381",
publisher = "IOP Publishing Ltd.",
number = "8",
}