Table 1 Relative uncertainties of three factors contributing to the accuracy of time-delay distance measurement

From: Precision cosmology from future lensed gravitational wave and electromagnetic signals

 

δΔt

δΔψ

δLOS

Lensed GW + EM

0%

0.6%

1%

Lensed quasar

3%

3%

1%

  1. δΔt, δΔψ, δLOS correspond to time delay, Fermat potential difference, and light-of-sight environment, respectively. We show the case for lensed gravitational wave (GW) + electromagnetic (EM) signals compared with standard technique in the EM domain using lensed quasars
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