  Significant gravitational wave emission is expected from gamma-ray bursts
arising from compact stellar mergers, and possibly also from bursts associated
with fast-rotating massive stellar core collapses. These models have in common
a high angular rotation rate, and observations provide evidence for jet
collimation of the photon emission, with properties depending on the polar
angle, which may also be of relevance for X-ray flashes. Here we consider the
gravitational wave emission and its polarization as a function of angle which
is expected from such sources. We discuss possible correlations between the
burst photon luminosity, or the delay between gravitational wave bursts and
X-ray flashes, and the polarization degree of the gravitational waves.
