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Upgrading and testing the 3D reconstruction of gamma-ray air showers as observed with an array of Imaging Atmospheric Cherenkov Telescopes

hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorNAUMANN-GODO, M.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorLEMOINE-GOUMARD, M.
hal.structure.identifierLaboratoire Leprince-Ringuet [LLR]
dc.contributor.authorDEGRANGE, B.
dc.date.issued2009-07
dc.identifier.issn0927-6505
dc.description.abstractEnStereoscopic arrays of Imaging Atmospheric Cherenkov Telescopes allow to reconstruct gamma-ray-induced showers in three dimensions, which offers several advantages: direct access to the shower parameters in space and straightforward calorimetric measurement of the incident energy. In addition, correlations between the different images of the same shower are taken into account. An analysis method based on a simple 3D-model of electromagnetic showers was recently implemented in the framework of the H.E.S.S. experiment. In the present article, the method is completed by an additional quality criterion, which reduces the background contamination by a factor of about 2 in the case of extended sources, while keeping gamma-ray efficiency at a high level. On the other hand, the dramatic flares of the blazar PKS 2155-304 in July 2006, which provided H.E.S.S. data with an almost pure gamma-ray sample, offered the unique opportunity of a precision test of the 3D-reconstruction method as well as of the H.E.S.S. simulations used in its calibration. An agreement at a few percent level is found between data and simulations for the distributions of all 3D shower parameters.
dc.language.isoen
dc.publisherElsevier
dc.subject.enGamma-ray astronomy
dc.subject.enHESS
dc.subject.enStereoscopy
dc.subject.enCherenkov Telescopes
dc.subject.en3D-reconstruction
dc.subject.enAnalysis method
dc.title.enUpgrading and testing the 3D reconstruction of gamma-ray air showers as observed with an array of Imaging Atmospheric Cherenkov Telescopes
dc.typeArticle de revue
dc.identifier.doi10.1016/j.astropartphys.2009.04.006
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Phénomènes cosmiques de haute energie [astro-ph.HE]
dc.identifier.arxiv0905.0359
bordeaux.journalAstroparticle Physics
bordeaux.page421-430
bordeaux.volume31
bordeaux.peerReviewedoui
hal.identifierin2p3-00410721
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00410721v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astroparticle%20Physics&rft.date=2009-07&rft.volume=31&rft.spage=421-430&rft.epage=421-430&rft.eissn=0927-6505&rft.issn=0927-6505&rft.au=NAUMANN-GODO,%20M.&LEMOINE-GOUMARD,%20M.&DEGRANGE,%20B.&rft.genre=article


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