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The University of Durham Southern Hemisphere VHE gamma ray telescope

Abstract

The design of very high energy (VHE) gamma ray telescopes is discussed and it is shown that a triple-mirror telescope operating in threefold fast coincidence provides an effective instrument. The design, construction and operation of a large VHE gamma ray telescope with an energy threshold of 300 GeV (at the zenith) and incorporating several novel features is described. The use of a coincidence ‘guard ring’ technique is shown to result in the rejection of about 50% of the off-source (proton) events which form a high background and limit the sensitivity of such telescopes.

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References

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Brazier, K.T., Carramiñana, A., Chadwick, P.M. et al. The University of Durham Southern Hemisphere VHE gamma ray telescope. Exp Astron 1, 77–99 (1989). https://doi.org/10.1007/BF00457984

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Keywords

  • Southern Hemisphere
  • Energy Threshold
  • High Background
  • Guard Ring
  • Effective Instrument