The Virgo Newtonian calibration system for the O4 observing run
Florian Aubin, Eddy Dangelser, Dimitri Estevez, Alain Masserot,, Beno\^it Mours, Thierry Pradier, Antoine Syx, Pierre Van Hove
TL;DR
The paper introduces a Newtonian Calibrator system for Virgo's O4 run, achieving high-precision absolute calibration with lower uncertainty than previous methods, enhancing gravitational wave measurement accuracy.
Contribution
It presents the design, implementation, and uncertainty analysis of a new Newtonian Calibrator system for Virgo's O4 gravitational wave observations.
Findings
Achieved 0.17% amplitude calibration uncertainty
Demonstrated continuous operation during O4 run
Provided more accurate calibration than photon calibrators
Abstract
After initial tests performed during previous observing runs, a Newtonian Calibrator (NCal) system was developed and installed on the Virgo gravitational wave detector for the O4 observing run. This system, which is continuously operated, provides the absolute calibration of Virgo for this run. Its uncertainty of on the amplitudes of the injected signals is better than that obtained with other calibration techniques like the photon calibrator (PCal). This paper presents this NCal system and details the different sources of uncertainties
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Geophysics and Gravity Measurements · Adaptive optics and wavefront sensing