  We recently suggested a nonlocal modification of Einstein's field equations
in which Newton's constant $G$ was promoted to a covariant differential
operator $G_\Lambda(\Box_g)$. The latter contains two independent
contributions, which operate respectively in the infrared (IR) and ultraviolet
(UV) energy regimes. In the light of the recent direct gravitational radiation
measurements we aim to determine the UV-modified 1.5 post-Newtonian radiative
quadrupole moment of a generic $n$-body system. We eventually use these initial
results in the particular context of a binary system and observe that in the
limit vanishing UV parameters we precisely recover the corresponding general
relativistic results. Moreover we observe that the leading order deviation of
the UV-modified radiative quadrupole moment numerically coincides with findings
obtained in the framework of calculations performed previously in the context
of possible deviations of the perihelion precession of Mercury.
