A tale of two populations: Rotating Radio Transients and X-ray Dim   Isolated Neutron Stars
  We highlight similarities between recently discovered Rotating Radio Transients and X-ray Dim Isolated Neutron Stars. In particular, it is shown that X-ray Dim Isolated Neutron Stars have a birthrate comparable to that of Rotating Radio Transients. On the contrary, magnetars have too low a formation rate to account for the bulk of the radio transient population. The consequences of the recent detection of a thermal X-ray source associated with one of the Rotating Radio Transients on the proposed scenarios for these sources are also discussed. 
S.B. Popov (1), R. Turolla (2), A. Possenti (3) (1-Sternberg   Astronomical Institute; 2- University of Padova; 3- Osservato...