Tackling excess noise from bilinear and nonlinear couplings in gravitational-wave interferometers

11th Edoardo Amaldi Conference on Gravitational Waves

Bose, Sukanta^1,2 ; Hall, Bernard^1 ; Mazumder, Nairwita^1 ; Dhurandhar, Sanjeev^2 ; Gupta, Anuradha^2 ; Lundgren, Andrew^3

Department of Physics and Astronomy, Washington State University, 1245 Webster, Pullman

WA

99164-2814, United States^1

Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune

411 007, India^2

Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Callinstrasse 38, Hannover

30167, Germany^3

关键词: Engineering data;    Excess noise;    Gaussians;    Gravitational wave interferometers;    Noise artifacts;    Nonlinear coupling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/716/1/012007/pdf
DOI  :  10.1088/1742-6596/716/1/012007

来源: IOP

【 摘 要 】

We describe a tool we improved to detect excess noise in the gravitational wave (GW) channel arising from its bilinear or nonlinear coupling with fluctuations of various components of a GW interferometer and its environment. We also describe a higher-order statistics tool we developed to characterize these couplings, e.g., by unraveling the frequencies of the fluctuations contributing to such noise, and demonstrate its utility by applying it to understand nonlinear couplings in Advanced LIGO engineering data. Once such noise is detected, it is highly desirable to remove it or correct for it. Such action in the past has been shown to improve the sensitivity of the instrument in searches of astrophysical signals. If this is not possible, then steps must be taken to mitigate its influence, e.g., by characterizing its effect on astrophysical searches. We illustrate this through a study of the effect of transient sine-Gaussian noise artifacts on a compact binary coalescence template bank.