Improving the sensitivity of Advanced LIGO using noise subtraction

Derek Davis, T. J. Massinger, Andrew Lundgren, J. C. Driggers, A. L. Urban, Laura Nuttall

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This paper presents an adaptable, parallelizable method for subtracting linearly coupled noise from Advanced LIGO data. We explain the features developed to ensure that the process is robust enough to handle the variability present in Advanced LIGO data. In this work, we target subtraction of noise due to beam jitter, detector calibration lines, and mains power lines. We demonstrate noise subtraction over the entirety of the second observing run, resulting in increases in sensitivity comparable to those reported in previous targeted efforts. Over the course of the second observing run, we see a 30% increase in Advanced LIGO sensitivity to gravitational waves from a broad range of compact binary systems. We expect the use of this method to result in a higher rate of detected gravitational-wave signals in Advanced LIGO data.
Original languageEnglish
Article number055011
Number of pages14
JournalClassical and Quantum Gravity
Issue number5
Early online date24 Jan 2019
Publication statusPublished - 13 Feb 2019


  • gravitational waves
  • detector characterization
  • noise subtraction
  • RCUK
  • STFC


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