Improving LIGO calibration accuracy by tracking and compensating for slow temporal variations

Abstract

Calibration of the second-generation LIGO interferometric gravitational-wave detectors employs a method that uses injected periodic modulations to track and compensate for slow temporal variations in the differential length response of the instruments. These detectors utilize feedback control loops to maintain resonance conditions by suppressing differential arm length variations. We describe how the sensing and actuation functions of these servo loops are parameterized and how the slow variations in these parameters are quantified using the injected modulations. We report the results of applying this method to the LIGO detectors and show that it significantly reduces systematic errors in their calibrated outputs.

13 pages, 8 figures. This is an author-created, un-copyedited version of an article published in Classical and Quantum Gravity. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it

References in corpus (9)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
• Characterization of the LIGO detectors during their sixth science run
• GW150914: The Advanced LIGO Detectors in the Era of First Discoveries
• The Sensitivity of the Advanced LIGO Detectors at the Beginning of Gravitational Wave Astronomy
• Calibration of the LIGO Gravitational Wave Detectors in the Fifth Science Run
• The Advanced LIGO Photon Calibrators
• Sensors and Actuators for the Advanced LIGO Mirror Suspensions
• Optimal Calibration Accuracy for Gravitational Wave Detectors

Cited by in corpus (24)

• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run
• Sensitivity and Performance of the Advanced LIGO Detectors in the Third Observing Run
• Characterization of systematic error in Advanced LIGO calibration
• Effects of waveform model systematics on the interpretation of GW150914
• Calibration Uncertainty for Advanced LIGO's First and Second Observing Runs
• Calibration of the Advanced LIGO detectors for the discovery of the binary black-hole merger GW150914
• Review of the Advanced LIGO gravitational wave observatories leading to observing run four
• The Advanced LIGO Photon Calibrators
• Search for Gravitational Waves Associated with Gamma-Ray Bursts During the First Advanced LIGO Observing Run and Implications for the Origin of GRB 150906B
• Gravitational-wave cosmography with LISA and the Hubble tension
• Possible Causes of False General Relativity Violations in Gravitational Wave Observations
• physiCal: A physical approach to the marginalization of LIGO calibration uncertainties
• Measurement of Hubble constant with stellar-mass binary black holes
• Detecting the Beaming Effect of Gravitational Waves
• Fiducial displacements with improved accuracy for the global network of gravitational wave detectors
• Improving the absolute accuracy of the gravitational wave detectors by combining the photon pressure and gravity field calibrators
• Prospects of the local Hubble parameter measurement using gravitational waves from double neutron stars
• Calibrating the cosmic distance ladder using gravitational-wave observations
• A back-linked Fabry-Perot interferometer for space-borne gravitational wave observations
• Impact of calibration uncertainties on Hubble constant measurements from gravitational-wave sources
• Experimental Demonstration of Back-Linked Fabry-Perot Interferometer for the Space Gravitational Wave Antenna
• Improving LIGO calibration accuracy by using time-dependent filters to compensate for temporal variations
• Effects of calibration uncertainties on the detection and parameter estimation of isotropic gravitational-wave backgrounds