Orateur
Description
The astrophysical parameters estimation of the sources detected by Advanced LIGO and Advanced Virgo is biased by the uncertainty on the physical parameters of each detector of the network and thus the final uncertainty on the reconstruction of the gravitational waves signal h(t). Before the observing run O3, Advanced LIGO and Advanced Virgo had different absolute references for their calibration procedure to derive the uncertainty on h(t). We present the first results of the intercalibration between Advanced LIGO and Advanced Virgo photon calibrators with respect to the LIGO Gold Standard which has been chosen to be the absolute reference for the time being. This work should lead to a relative calibration of the interferometers network during O3 using the same absolute reference for Advanced LIGO and Advanced Virgo and thus better quantify the global uncertainty of the network. Future interferometers joining the network, for instance KAGRA which has worked for more than one year with LIGO on their Working Standard for calibration, will also be calibrated with respect to the LIGO Gold Standard to be on the same level of absolute uncertainty.
