ENERGY AND ANGULAR-MOMENTUM OF CHARGED ROTATING BLACK-HOLES

We show that the pseudotensors of Einstein, Tolman, Landau and Lifshit z, Papapetrou, and Weinberg essentially coincide for any Kerr-Schild m etric if calculations are carried out in Kerr-Schild Cartesian coordin ates. This generalizes a previous result by Gurses and Gursey that dea lt only with the pseudotensors of Einstein and Landau-Lifshitz. We com pute exactly the energy and angular momentum distributions for the Ker r-Newman metric in Kerr-Schild Cartesian coordinates and compare the r esults with those obtained by using different definitions of quasiloca l mass, which unlike pseudotensors do not agree for all Kerr-Schild me trics.