The total number of such highly energetic events is however tiny. The previous analysis was based on a total of 27 events. Meanwhile, AUGER has more data and they've redone their analysis with 31 additional events. The news is that there's no news. One might have expected the correlation to become better, but it didn't. The observed correlation has still less than 1% chance to occur by chance if the arrival directions were isotropically distributed, but that's it. The situation is depicted in the below figure. Shown is the number of events and their angular distance to the next closest active galactic nuclei (in the VCV catalogue). The brown shaded region is the average expectation from isotropy. You see how the data has an excess at small angles. The hatched data shows events from directions close by the galactic plane (I suppose because the error might be higher).
[Picture Credits: J.D. Hague, AUGER Collaboration]
You can find the details and the above figure in this paper:
- Astrophysical Sources of Cosmic Rays and Related Measurements with the Pierre Auger Observatory