Tuesday, August 05, 2008

Auger Observatory Collaboration Sees the GZK Cuttoff

Now both HiRES and Auger have observed the GZK cuttoff. In the latest report out of Auger, they see a suppression of ultra-high energy cosmic rays above 4 x 10^19 eV.

There is a Viewpoint article on this in the APS Physics section (and even a free download to the paper).


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