Timing the Kilohertz Quasi-Periodic Oscillations in Low-mass X-ray   Binaries
  I describe a new technique that we have been using in the past few years to get precise measurements of the frequency separation of the kHz QPOs in some Low-mass X-ray binaries. I show how this technique (that we call "shift-and-add") works, and I present some of the results we obtained using it. 
Mariano Mendez (University of Amsterdam)