# Measuring the speed of gravitational waves from the first and second observing run of Advanced LIGO and Advanced Virgo

@article{Liu2020MeasuringTS, title={Measuring the speed of gravitational waves from the first and second observing run of Advanced LIGO and Advanced Virgo}, author={Xiaoshu Liu and Vincent Yaofeng He and Timothy M. Mikulski and Daria Palenova and Claire E. Williams and Jolien D. E. Creighton and Jay D. Tasson}, journal={Physical Review D}, year={2020}, volume={102}, pages={024028} }

The speed of gravitational waves for a single observation can be measured by the time delay among gravitational-wave detectors with Bayesian inference. Then multiple measurements can be combined to produce a more accurate result. From the near simultaneous detection of gravitational waves and gamma rays originating from GW170817/GRB 170817A, the speed of gravitational wave signal was found to be the same as the the speed of the gamma rays to approximately one part in $10^{15}$. Here we present…

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