  Compact object mergers are one of the favorite models of GRBs. It has been
noted that in opposition to the collapsars, compact object mergers do not
necessarily take place in the host galaxies, and may travel outside of them.
With the discovery of afterglows and identification of host galaxies one can
measure the distribution of GRBs with respect to their host galaxies. This
distribution has been calculated using different population synthesis codes,
and for different galactic potentials
  In this paper we compare the distributions of different types of compact
object binaries: double neutron star systems (NS-NS), black hole -neutron star
systems (BH-NS) and double black holes (BH-BH). We calculate the orbits and
distributions of the projected distances on the sky for two extreme cases: a
massive galaxy like the Milky Way, and empty space (corresponding to e.g. a
globular cluster), and consider a wide range of possible kick velocity
distributions. We find that BH-NS are more likely gamma-ray burst counterparts,
since they lie close to the host galaxies, contrary to the NS-NS binaries.
