TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic 
background radiation

Aharonian, F.; Akhperjanian, A.; Barrio, J.; Beilicke, M.; Bernlöhr, K.; Borst, H.; Bojahr, H.; Bolz, O.; Contreras, J.; Cornils, R.; Cortina, J.; Denninghoff, S.; Fonseca, V.; Girma, M.; Gonzalez, J.; Gotting, N.; Heinzelmann, G.; Hermann, G.; Heusler, A.; Hofmann, W.; Horns, D.; Jung, I.; Kankanyan, R.; Kestel, M.; Kohnle, A.; Konopelko, A.; Kornmeyer, H.; Kranich, D.; Krawczynski, H.; Lampeitl, H.; Lopez, M.; Lorenz, E.; Lucarelli, F.; Magnussen, N.; Mang, O.; Meyer, H.; Mirzoyan, R.; Moralejo, A.; Ona, E.; Padilla, L.; Panter, M.; Plaga, R.; Plyasheshnikov, A.; Pühlhofer, G.; Rauterberg, G.; Rohring, A.; Rhode, W.; Robrade, J.; Rowell, G.; Sahakian, V.; Samorski, M.; Schilling, M.; Schroder, F.; Sevilla, I.; Siems, M.; Stamm, W.; Tluczykont, M.; Völk, H. J.; Wiedner, C. A.; Wittek, W.

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TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation

MPS-Authors

/persons/resource/persons30244

Aharonian, F.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30247

Akhperjanian, A.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30290

Beilicke, M.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30300

Bernlöhr, K.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30322

Bolz, O.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30380

Cornils, R.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30517

Girma, M.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30584

Hermann, G.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30591

Heusler, A.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30605

Hofmann, W.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30623

Horns, D.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30641

Jung, I.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30653

Kankanyan, R.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30699

Kohnle, A.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30703

Konopelko, A.
Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30720

Krawczynski, H.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30741

Lampeitl, H.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30878

Panter, M.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30901

Plyasheshnikov, A.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30914

Pühlhofer, G.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30959

Rowell, G.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30987

Schilling, M.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31141

Völk, H. J.
Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31174

Wiedner, C. A.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31183

Wittek, W.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Citation

Aharonian, F., Akhperjanian, A., Barrio, J., Beilicke, M., Bernlöhr, K., Borst, H., et al. (2002). TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation. Astronomy & Astrophysics, 384(3), L23-L26.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-83B4-1

Abstract

The detection of TeV gamma-rays from the blazar H1426+428 at an integral flux level of (4 +/- 2(stat) +/- 1(syst)) x 10(-12) erg cm-(2) s(-1) above 1 TeV with the HEGRA imaging atmospheric Cherenkov telescope system is reported. H1426+428 is located at a redshift of z = 0.129, which makes it the most distant source detected in TeV gamma-rays so far. The TeV radiation is expected to be strongly absorbed by the diffuse extragalactic background radiation (DEBRA). The observed energy spectrum of TeV photons is in good agreement with an intrinsic power law spectrum of the source proportional to E-(1.9) corrected for DEBRA absorption. Statistical errors as well as uncertainties about the intrinsic source spectrum, however, do not permit strong statements about the density of the DEBRA infrared photon field.