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We analyze the active-galaxy correlation reported in 2007 by the Pierre AugerCollaboration. The signal diminishes if the correlation-function approach(counting all "source-event" pairs and not only "nearest neighbours") is used,suggesting that the correlation may reveal individual sources and not theirpopulation. We analyze available data on physical conditions in theseindividual correlated sources and conclude that acceleration of protons to theobserved energies is hardly possible in any of these galaxies, while heaviernuclei would be deflected by the Galactic magnetic field thus spoiling thecorrelation. Our results question the Auger interpretation of the reportedanisotropy signal but do not contradict to its explanation withintermediate-mass nuclei accelerated in Cen A.

Physical conditions in nearby active galaxies correlated with ultra-high-energy cosmic rays detected by the Pierre Auger Observatory