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  Limits on the TeV flux of diffuse gamma rays as measured with the HEGRA air shower array

Aharonian, F. A., Akhperjanian, A. G., Barrio, J. A., Bernlöhr, K., Bojahr, H., Bolz, O., et al. (2002). Limits on the TeV flux of diffuse gamma rays as measured with the HEGRA air shower array. Astroparticle Physics, 17(4), 459-475.

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Aharonian, F. A.1, Author           
Akhperjanian, A. G.1, Author           
Barrio, J. A.2, Author
Bernlöhr, K.1, Author           
Bojahr, H.2, Author
Bolz, O.1, Author           
Borst, H.2, Author
Contreras, J. L.2, Author
Cortina, J.2, Author
Denninghoff, S.2, Author
Fonseca, V.2, Author
Gebauer, H. J.1, Author           
Gonzalez, J. C.2, Author
Gotting, N.2, Author
Heinzelmann, G.2, Author
Hermann, G.1, Author           
Heusler, A.1, Author           
Hofmann, W.1, Author           
Horns, D.1, Author           
Ibarra, S.2, Author
Iserlohe, C.2, AuthorJung, I.1, Author           Kankanyan, R.1, Author           Kestel, M.2, AuthorKohnle, A.1, Author           Konopelko, A.3, Author           Kornmayer, H.2, AuthorKranich, D.2, AuthorKrawczynski, H.1, Author           Lampeitl, H.1, Author           Lopez, M.2, AuthorLorenz, E.2, AuthorLucarelli, F.2, AuthorMagnussen, N.2, AuthorMang, O.2, AuthorMeyer, H.2, AuthorMirzoyan, R.2, AuthorMoralejo, A.2, AuthorOna, E.2, AuthorPadilla, L.2, AuthorPanter, M.1, Author           Plaga, R.2, AuthorPlyasheshnikov, A.1, Author           Prahl, J.2, AuthorPühlhofer, G.1, Author           Rauterberg, G.2, AuthorRhode, W.2, AuthorRohring, A.2, AuthorRowell, G. P.1, Author           Sahakian, V.2, AuthorSamorski, M.2, AuthorSchilling, M.1, Author           Schroder, F.2, AuthorSiems, M.2, AuthorStamm, W.2, AuthorTluczykont, M.2, AuthorVölk, H. J.3, Author           Wiedner, C.1, Author           Wittek, W.1, Author            more..
1Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550              
2Yerevan Phys Inst, Yerevan 375036, Armenia; Univ Complutense Madrid, Fac Ciencias Fis, E-28040 Madrid, Spain; Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany; Univ Kiel, Inst Exptl & Angew Phys, D-24118 Kiel, Germany; Univ Hamburg, Inst Expt Phys 2, D-22761 Hamburg, Germany, ou_persistent22              
3Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society, ou_907548              


Free keywords: cosmic rays; diffuse gamma-ray galactic emission; gamma rays; observations
 Abstract: Using data from the HEGRA air shower array. taken in the period from April 1998 to March 2000, upper limits on the ratio I- gamma/I-CR of the diffuse photon flux I-gamma to the hadronic cosmic ray flux I-CR are determined for the energy region 20, 100 TeV. The analysis uses a gamma-hadron discrimination which is based on differences in the development of photon- and hadron-induced air showers after the shower maximum, A method which is sensitive only to the non-isotropic component of the diffuse photon flux yields an upper limit of I-gamma/I-CR (at 54 TeV) < 2.0 x 10 (3) (at the 90% confidence level) for a sky region near the inner galaxy (20degrees < galactic longitude < 60degrees and \galactic latitude\ < 5degrees). A method which is sensitive to both the isotropic and the non-isotropic component yields global upper limits of I-gamma/I-CR (at 31 TeV) < 1.2 x 10(-2) and I-gamma/(CR) (at 53 TeV) < 1.4 x 10 (2) (at the 90% confidence level). (C) 2002 Elsevier Science B.V. All rights reserved.


Language(s): eng - English
 Dates: 2002-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 28253
ISI: 000176198700008
 Degree: -



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Title: Astroparticle Physics
  Alternative Title : Astropart Phys.
Source Genre: Journal
Publ. Info: -
Pages: - Volume / Issue: 17 (4) Sequence Number: - Start / End Page: 459 - 475 Identifier: ISSN: 0927-6505