The topological second-level trigger of the HESS phase 2 telescope
HESS is an array of atmospheric Cherenkov telescopes dedicated to GeV–TeV γ-ray astronomy. The original array has been in operation since the beginning of 2004. It is composed of four 12-m diameter telescopes. The installation of a fifth 28-m diameter telescope is being completed. This telescope wil...
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Published in | Astroparticle physics Vol. 34; no. 7; pp. 568 - 574 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
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Elsevier B.V
01.02.2011
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Abstract | HESS is an array of atmospheric Cherenkov telescopes dedicated to GeV–TeV
γ-ray astronomy. The original array has been in operation since the beginning of 2004. It is composed of four 12-m diameter telescopes. The installation of a fifth 28-m diameter telescope is being completed. This telescope will operate both in stereoscopic mode and in monoscopic mode
i.e. without a coincident detection on the smaller telescopes. A second-level trigger system is needed to suppress spurious triggers of the 28-m telescope when operated in monoscopic mode. This paper gives the motivation and principle of the second-level trigger. The principle of operation is illustrated by an example algorithm. The hardware implementation of the second level trigger system of HESS phase 2 is described and its expected performances are then evaluated. |
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AbstractList | HESS is an array of atmospheric Cherenkov telescopes dedicated to GeV–TeV
γ-ray astronomy. The original array has been in operation since the beginning of 2004. It is composed of four 12-m diameter telescopes. The installation of a fifth 28-m diameter telescope is being completed. This telescope will operate both in stereoscopic mode and in monoscopic mode
i.e. without a coincident detection on the smaller telescopes. A second-level trigger system is needed to suppress spurious triggers of the 28-m telescope when operated in monoscopic mode. This paper gives the motivation and principle of the second-level trigger. The principle of operation is illustrated by an example algorithm. The hardware implementation of the second level trigger system of HESS phase 2 is described and its expected performances are then evaluated. HESS is an array of atmospheric Cherenkov telescopes dedicated to GeV-TeV gamma -ray astronomy. The original array has been in operation since the beginning of 2004. It is composed of four 12-m diameter telescopes. The installation of a fifth 28-m diameter telescope is being completed. This telescope will operate both in stereoscopic mode and in monoscopic mode i.e. without a coincident detection on the smaller telescopes. A second-level trigger system is needed to suppress spurious triggers of the 28-m telescope when operated in monoscopic mode. This paper gives the motivation and principle of the second-level trigger. The principle of operation is illustrated by an example algorithm. The hardware implementation of the second level trigger system of HESS phase 2 is described and its expected performances are then evaluated. |
Author | Calvet, D. Vivier, M. Glicenstein, J.-F. Barnacka, A. Moudden, Y. Venault, P. Fontaine, G. |
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Snippet | HESS is an array of atmospheric Cherenkov telescopes dedicated to GeV–TeV
γ-ray astronomy. The original array has been in operation since the beginning of... HESS is an array of atmospheric Cherenkov telescopes dedicated to GeV-TeV gamma -ray astronomy. The original array has been in operation since the beginning of... |
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SubjectTerms | FPGA HESS Imaging atmospheric Cherenkov telescope Real-time Trigger γ-Ray astronomy |
Title | The topological second-level trigger of the HESS phase 2 telescope |
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