  A scalar bimetric theory of gravity with a preferred reference frame is
summarized. Dynamics is governed by an extension of Newton's second law. In the
static case, geodesic motion is recovered together with Newton's attraction
field. In the static spherical case, Schwarzschild's metric is found.
Asymptotic schemes of post-Newtonian (PN) and post-Minkowskian (PM)
approximation are built, each based on associating a conceptual family of
systems with the given system. At the 1PN approximation, there is no
preferred-frame effect for photons, hence the standard predictions of GR for
photons are got. At the 0PM approximation, an isolated system loses energy by
quadrupole radiation, without any monopole or dipole term. Inserting this loss
into the Newtonian 2-body problem gives the Peters-Mathews coefficients of the
theory.
