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Highlights from the Telescope Array Experiments

by Hiroyuki Sagawa

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Submission summary

Authors (as registered SciPost users): Hiroyuki Sagawa
Submission information
Preprint Link:  (pdf)
Date submitted: 2022-09-30 05:16
Submitted by: Sagawa, Hiroyuki
Submitted to: SciPost Physics Proceedings
Proceedings issue: 21st International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI2022)
Ontological classification
Academic field: Physics
  • Gravitation, Cosmology and Astroparticle Physics
Approach: Observational


The Telescope Array (TA) is the largest hybrid cosmic ray detector in the Northern Hemisphere, which observes primary particles in the energy range from 2 PeV to 100 EeV. The main TA detector consists of 507 plastic scintillation counters on a 1.2-km spacing square grid and fluorescence detectors at three stations overlooking the sky above the surface detector array. The TA Low energy Extension (TALE) hybrid detectors, which consists of ten fluorescence telescopes, and 80 infill surface detectors with 400-m and 600-m spacing, has continued to provide stable observations since its construction completion in 2018. The TAx4, a plan to quadruple the detection area of TA is also ongoing. About half of the planned detectors have been deployed, and the current TAx4 continues to operate stably as a hybrid detector. I review the present status of the TA experiment and the recent results on the cosmic-ray anisotropy, mass composition and energy spectrum.

Current status:
Has been resubmitted

Reports on this Submission

Anonymous Report 1 on 2022-10-21 (Invited Report)

  • Cite as: Anonymous, Report on arXiv:2209.03591v2, delivered 2022-10-21, doi: 10.21468/SciPost.Report.5945


The paper reports recent and interesting results on ultra-high energy cosmic rays (UHECRs) from the TALE and the TA observatories, which were recently presented at the ISVHECRI 2022. The contribution shows results on the energy spectrum, arrival directions and the composition of UHECRs. The TALE/TA observatory is the only UHECR detector on the northern hemisphere. Its data complements the measurements from the Pierre Auger observatory, which are done on the southern hemisphere.




I recommend to address the comments, questions, suggestions and corrections that are listed in the attached PDF document before resubmitting the paper.

Requested changes

The list of changes and suggestions are listed in the attached PDF document .


  • validity: high
  • significance: high
  • originality: high
  • clarity: good
  • formatting: good
  • grammar: good

Author:  Hiroyuki Sagawa  on 2023-03-14  [id 3475]

(in reply to Report 1 on 2022-10-21)

Dear the referee,

The updated arXiv can be found as version 3. I attached my reply to your comments in the attached file.



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