Abstract
A torus develops a state of suspended accretion against a magnetic wall around a rapidly rotating black hole formed in core-collapse hypernovae. It hereby emits about 10% of the black hole spin energy in gravitational radiation from a finite number of multipole mass moments. We quantify the relation between the frequency of quadrupole gravitational radiation and the energy output Ew in torus winds by fgw 470 Hz(Ew/4 × 1052 ergs)1/2(7 M☉/M)3/2, where M denotes the mass of the black hole. We propose that Ew irradiates the remnant stellar envelope from within. We identify Ew with energies ~ 1052 ergs inferred from X-ray observations on matter injecta and the poloidal curvature in the magnetic wall with the horizon opening angle in baryon poor outflows that power true GRB energies of Eγ 3 × 1051 ergs.
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