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Title:
Single photon counting approach for imaging atmospheric Cherenkov telescopes
Authors:
Catalano, O.; Maccarone, M. C.; Sacco, B.
Affiliation:
AA(Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo, Istituto Nazionale di Astrofisica, Via Ugo La Malfa 153, 90146 Palermo, Italy), AB(Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo, Istituto Nazionale di Astrofisica, Via Ugo La Malfa 153, 90146 Palermo, Italy), AC(http://www.iasf-palermo.inaf.it.)
Publication:
Astroparticle Physics, Volume 29, Issue 2, p. 104-116. (APh Homepage)
Publication Date:
03/2008
Origin:
ELSEVIER
PACS Keywords:
X- and gamma-ray telescopes and instrumentation, gamma-ray
DOI:
10.1016/j.astropartphys.2007.11.011
Bibliographic Code:
2008APh....29..104C

Abstract

The aim of this article is to present a single photon counting technique applied to the imaging atmospheric Cherenkov telescopes as an alternative to the charge integration technique used by most experiments in the field. A comparison of the two techniques has been performed, assuming suitable and realistic telescope layouts but different methods to treat and convert the electrical signals at the output of the light sensors. A set of γ-ray induced showers, with primary energies ranging from 300 GeV to 10 TeV, has been simulated for this comparison. The study has been performed both for a single telescope and for a three-telescope array. The results show, in both cases, considerably higher trigger efficiencies in the single photon counting method, with respect to the analog one, particularly at the lowest energies. Single telescope energy thresholds for the two methods are also reported and discussed.
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Database: Astronomy
Physics
arXiv e-prints