Evolution of Kerr-Schild type initial data for binary black holes using   the horizon penetrating Teukolsky equation
  We use the Kerr-Schild type Teukolsky equation (horizon penetrating) to evolve binary black hole initial data as proposed by Bishop {\em et al.} in the close limit. Our results are in agreement with those recently obtained by Sarbach {\em et al.} from the Zerilli equation evolution of the same initial data. 
Gaurav Khanna