Calibration of Advanced Virgo and reconstruction of detector strain h(t) during the Observing Run O3

Abstract

The three Advanced Virgo and LIGO gravitational wave detectors participated to the third observing run (O3) between 1 April 2019 15:00 UTC and 27 March 2020 17:00 UTC,leading to several gravitational wave detections per month. This paper describes the Advanced Virgo detector calibration and the reconstruction of the detector strain $h(t)$ during O3, as well as the estimation of the associated uncertainties. For the first time, the photon calibration technique as been used as reference for Virgo calibration, which allowed to cross-calibrate the strain amplitude of the Virgo and LIGO detectors. The previous reference, so-called free swinging Michelson technique, has still been used but as an independent cross-check. $h(t)$ reconstruction and noise subtraction were processed online, with good enough quality to prevent the need for offline reprocessing, except for the two last weeks of September 2019. The uncertainties for the reconstructed $h(t)$ strain, estimated in this paper in a 20-2000~Hz frequency band, are frequency independent: 5% in amplitude, 35 mrad in phase and 10 $\mu$s in timing, with the exception of larger uncertainties around 50 Hz.

50 pages, 30 figures. Submitted to Class. and Quantum Grav.. Includes revision after referee's comments (resubmitted Nov. 2021)

References in corpus (14)

• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Advanced LIGO
• GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half 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
• Machine-learning non-stationary noise out of gravitational wave detectors
• Calibration and sensitivity of the Virgo detector during its second science run
• The Advanced LIGO Photon Calibrators
• High-frequency corrections to the detector response and their effect on searches for gravitational waves
• physiCal: A physical approach to the marginalization of LIGO calibration uncertainties
• Fiducial displacements with improved accuracy for the global network of gravitational wave detectors
• The Advanced Virgo Photon Calibrators
• End benches scattered light modeling and subtraction in Advanced Virgo
• Newtonian calibrator tests during the Virgo O3 data taking

Cited by in corpus (2)

• GWTC-2.1: Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
• Sensors and Actuators for the Advanced LIGO+ Upgrade