Gravitational wave memory of the binary black hole events in GWTC-2

Gravitational wave (GW) memory is an important prediction of general relativity. Existing works on the GW detection targeted nonoscillatory strain. It hard for strain analysis method to detect due its quasidirect current behavior and weakness. We implement a completely different scheme in this work estimate memory. In scheme, we first apply Bondi-Metzner-Sachs calculate binary black hole based numerical relativity simulation. Then construct surrogate model relate hole's parameters Afterwards together with Bayesian techniques 48 events recorded GWTC-2. The corresponding all has been estimated.