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A very large team of researchers affiliated with several institutions in China and Japan has measured the highest energy photon ever recorded. In their paper published in the journal Physical Review Letters, the group describes their study of data from the Tibet Air Shower Gamma Collaboration and what they found.
The Tibet Air Shower Gamma Collaboration is an observatory in the Tibetan Plateau and the people that run it. It consists of 600 particle detectors built on a 65,000-square-meter parcel of land. Its objective is to detect subatomic particles emanating from space. The detectors there observe the debris from photons colliding with particles in the Earth's atmosphere and cosmic rays, which are mostly protons and atomic nuclei. The team members with this new effort were focused on photons that make their way to Earth from far-off places. To measure them, the researchers excluded muon detections, leaving only particles associated with photon collisions. The researchers were able to calculate the energy of a given photon using data from the particles that it struck.
Researchers - Report
The researchers report...
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