Newtonian calibrator tests during the Virgo O3 data taking

Abstract The gravitational-wave detectors outputs from the LIGO and Virgo collaborations have been a source of scientific results prime importance in various domains such as astrophysics, cosmology or fundamental physics. With upgrades their improved sensitivities, new challenges are set for these instruments calibration. A calibration method based on local variations Newtonian gravitational field could be next absolute reference interferometers network. We report tests calibrators (NCal) advanced detector performed during LIGO–Virgo observing run O3. NCal-induced strain mirror interferometer has computed both using analytical calculations numerical simulations with very good agreement. strains given by model used to analyse data NCals compared photon radiation pressure. New methods measure NCal distance offset respect plane two also presented. They correct which improves agreement current