What is recorded here?
On 27 May 2021 Telescope Array recorded an extensive air shower across 23 surface detectors. Its reconstructed primary energy was 244 ± 29 statistical and +51/−76 systematic exaelectronvolts on the fluorescence-calibrated energy scale. The arrival direction and backtracking under selected Galactic magnetic-field models were compared with nearby source distributions.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
This is one reconstructed air-shower event, not a direct detection of the primary particle in the detector. The fluorescence detectors were inactive because of moonlight; the classifier disfavored a photon under its model but could not distinguish a proton from heavy nuclei. The 244 EeV scale is calibrated from other fluorescence observations; the original surface-detector estimate was 309 ± 37 EeV before normalization. Large energy and composition uncertainties and Galactic/extragalactic magnetic deflections affect source inference. The authors identified no convincing source under their selected models; a Local Void line of sight is not proof of a source in the void or of new physics. Earlier 1991, 1993 and 2001 ultra-high-energy events retain credit. The paper includes supplementary material; the raw event data have not been independently reanalyzed.
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People and systems
R. U. Abbasi; M. G. Allen; R. Arimura; Toshihiro Fujii
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged. The recorded author list is incomplete.
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English catalogue narrative
Telescope Array records an exceptionally energetic cosmic-ray air shower
On 27 May 2021 Telescope Array recorded an extensive air shower across 23 surface detectors. Its reconstructed primary energy was 244 ± 29 statistical and +51/−76 systematic exaelectronvolts on the fluorescence-calibrated energy scale. The arrival direction and backtracking under selected Galactic magnetic-field models were compared with nearby source distributions.
Scientific scope
This is one reconstructed air-shower event, not a direct detection of the primary particle in the detector. The fluorescence detectors were inactive because of moonlight; the classifier disfavored a photon under its model but could not distinguish a proton from heavy nuclei. The 244 EeV scale is calibrated from other fluorescence observations; the original surface-detector estimate was 309 ± 37 EeV before normalization. Large energy and composition uncertainties and Galactic/extragalactic magnetic deflections affect source inference. The authors identified no convincing source under their selected models; a Local Void line of sight is not proof of a source in the void or of new physics. Earlier 1991, 1993 and 2001 ultra-high-energy events retain credit. The paper includes supplementary material; the raw event data have not been independently reanalyzed.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
R. U. Abbasi; M. G. Allen; R. Arimura; Toshihiro Fujii
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.