  The physical nature of gamma-ray bursts (GRBs) are believed to involve an
ultra-relativistic jet. The observed complex structure of light curves motivate
the idea of jet precession. In this work, we study the gravitational waves of
jet precession based on neutrino-dominated accretion disks around black holes,
which may account for the central engine of GRBs. In our model, the jet and the
inner part of the disk may precess along with the black hole, which is driven
by the outer part of the disk. Gravitational waves are therefore expected to be
significant from this black hole-inner disk precession system. By comparing our
numerical results with the sensitivity of some detectors, we find that it is
possible for DECIGO and BBO to detect such gravitational waves, particularly
for GRBs in the Local Group.
