MG11 
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Horizon news function and quasi-local energy-momentum flux near black hole

From the 'quasi-local' definition of horizons, e.g. isolated horizon and dynamical horizon, the consequence quasi-local energy-momentum near horizons can be observed by using the idea of frame alignment. In particular, we find the horizon news function from the asymptotic expansion near horizon and use this to describe the gravitational flux and change of mass of a black hole.