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Four UHECRs in the combined HiRes and AGASA datasets are backtracked in theGalactic magnetic field. They point to a common source which is localized towithin 1 degree, if they are protons as is shown to be the most probable chargeassignment. A Swift-BAT hard X-ray AGN in the galaxy CGCG 291-028 is the onlynotable source candidate within the source locus and within the GZK distancehorizon. The spectrum of the four events is consistent with production in atransient event such as a stellar tidal disruption flare. Under the assumptionthe UHECRs were produced in CGCG 291-028, the total energy of UHECRs producedby the transient can be estimated and extragalactic magnetic deflections can beconstrained. If CGCG 291-028 is indeed the source of the UHECRs, observationsof its present state should elucidate the phenomenon of UHECR acceleration.

Tentative identification of the source of four UHECRs, and implications thereof