The technical performance of the HEGRA system of imaging air Cherenkov telescopes

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dc.contributor.authorPuhlhofer, G.
dc.contributor.authorBolz, O.
dc.contributor.authorGotting, N.
dc.contributor.authorHeusler, A.
dc.contributor.authorHorns, D.
dc.contributor.authorKohnle, A.
dc.contributor.authorLampeitl, H.
dc.contributor.authorPanter, M.
dc.contributor.authorTluczykont, M.
dc.contributor.authorAharonian, F.
dc.contributor.authorAkhperjanian, A.
dc.contributor.authorBeilicke, M.
dc.contributor.authorBernlohr, K.
dc.contributor.authorBorst, H.
dc.contributor.authorBojahr, H.
dc.contributor.authorCoarasa, T.
dc.contributor.authorContreras, J.
dc.contributor.authorContina, J.
dc.contributor.authorDenninghoff, S.
dc.contributor.authorFonseca, M.
dc.contributor.authoret al.
dc.date.issued2003
dc.description.abstractBetween early 1997 and late 2002, the HEGRA collaboration operated a stereoscopic system of 4 (later 5) imaging atmospheric Cherenkov telescopes. In this paper we present the calibration schemes which were developed for the system, and report on the performance of the detector over the years. In general, the telescope system was very well understood, regarding both the absolute calibration and the slight changes in performance over the years. The system had an energy threshold of 500 GeV for observations at zenith and under optimum detector conditions. With the corresponding calibration schemes, a systematic accuracy of 15 percent on the absolute energy scale has been achieved. The continuous sensitivity monitoring provided a relative accuracy of a few percent, and showed that the threshold did not exceed 600 GeV throughout the entire operation time. The readout electronics and the imaging quality of the dishes were well monitored and stable. The absolute pointing had an accuracy of at least 25 arcsec; this number was guaranteed throughout the whole lifetime of the experiment.
dc.description.statementofresponsibilityG. Puhlhofer ... G. P. Rowell.. and W. Wittek...et al., the HEGRA Collaboration
dc.identifier.citationAstroparticle Physics, 2003; 20(3):267-291
dc.identifier.doi10.1016/j.astropartphys.2003.06.001
dc.identifier.issn0927-6505
dc.identifier.orcidRowell, G. [0000-0002-9516-1581]
dc.identifier.urihttp://hdl.handle.net/2440/37592
dc.language.isoen
dc.publisherElsevier Science BV
dc.rights(c) 2003 Elsevier B.V. All rights reserved. Submitted to Cornell University’s online archive www.arXiv.org in 2003 by Gerd Puehlhofer. Post-print sourced from www.arxiv.org
dc.source.urihttp://arxiv.org/abs/astro-ph/0306123
dc.subjectImaging air Cherenkov technique
dc.subjectVery high energy gamma ray astronomy PACS: 95.55.Ka, 95.55.Vj, 96.40.Pq
dc.titleThe technical performance of the HEGRA system of imaging air Cherenkov telescopes
dc.typeJournal article
pubs.publication-statusPublished

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