http://arxiv.org/pdf/1503.05245v2.pdf ABSTRACT "Fast Radios Bursts (FRBs) show large dispersion measures (DMs), suggesting an extra galactic location. We analyze the DMs of the 11 known FRBs in detail and identify steps as integer multiples of half the lowest DM found, 187.5cm3 pc, so that DMs occur in groups centered at 375, 562,750, 937, 1125cm3 pc, with errors observed < 5%. We estimate the likelihood of a coincidence as 5 : 10,000. We speculate that this could originate from a Galaxy population of FRBs, with Milky Way DM contribution as model deviations, and an underlying generator process that produces FRBs with DMs in discrete steps. However, we find that FRBs tend to arrive at close to the full integer second, like man-made perytons. If this holds, FRBs would also be man-made. This can be verifi ed, or refuted, with new FRBs to be detected." Is the DM integer second spacing coincidence, man-made or extra-terrestial in origin?