Gravitational waveforms of Kerr black holes interacting with high-density matter

Interactions of high-density matter with rapidly rotating black holes are a natural outcome of core collapse in massive stars, neutron star mergers, or the coalescence of black hole-neutron star binaries. An ensuing long-lived state of suspended accretion may explain GRB 030329/SN 2003dh and GRB 060614. It predicts a chirp in gravitational radiation with exponential decaying frequency, by correlation of the radius of the surrounding matter with an expanding ISCO during viscous relaxation to a nearly Schwarzschild spacetime. The asymptotic value f(gw) (in kHz) provides novel metrology of the black hole mass M <= 5.9f(gw)(-1) M-circle dot. An optimal search algorithm is included.