  I discuss the nature of the compact X-ray source inside the supernova remnant
RCW 103. Several models, based on the accretion onto a compact object such as a
neutron star or a black hole (isolated or binary), are analyzed. I show that it
is more likely that the X-ray source is an accreting neutron star than an
accreting black hole. I also argue that models of a binary system with an old
accreting neutron star are most favored.
