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

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

doi:10.1051/0004-6361:20020206

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

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

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Abstract

The detection of TeV γ-rays from the blazar H 1426+428 at an integral flux level of (4 ± 2_stat ± 1_syst) × 10^-12 erg cm^-2 s^-1 above 1 TeV with the HEGRA imaging atmospheric Cherenkov telescope system is reported. H 1426+428 is located at a redshift of z = 0.129, which makes it the most distant source detected in TeV γ-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 ∝ 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.

Original language	English
Pages (from-to)	L23-L26
Journal	Astronomy and Astrophysics
Volume	384
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:20020206
State	Published - Mar 2002

Keywords

BL Lacertae objects: individual: H 1426+428
Diffuse radiation
Gamma rays: observations

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10.1051/0004-6361:20020206

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Aharonian, F., Akhperjanian, A., Barrio, J., Beilicke, M., Bernlöhr, K., Börst, H., Bojahr, H., Bolz, O., Contreras, J., Cornils, R., Cortina, J., Denninghoff, S., Fonseca, V., Girma, M., Gonzalez, J., Götting, N., Heinzelmann, G., Hermann, G., Heusler, A., ... Wittek, W. (2002). TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation. Astronomy and Astrophysics, 384(3), L23-L26. https://doi.org/10.1051/0004-6361:20020206

@article{41fdc104293d48b380ac28ba5711596c,

title = "TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation",

abstract = "The detection of TeV γ-rays from the blazar H 1426+428 at an integral flux level of (4 ± 2stat ± 1syst) × 10-12 erg cm-2 s-1 above 1 TeV with the HEGRA imaging atmospheric Cherenkov telescope system is reported. H 1426+428 is located at a redshift of z = 0.129, which makes it the most distant source detected in TeV γ-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 ∝ 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.",

keywords = "BL Lacertae objects: individual: H 1426+428, Diffuse radiation, Gamma rays: observations",

author = "F. Aharonian and A. Akhperjanian and J. Barrio and M. Beilicke and K. Bernl{\"o}hr and H. B{\"o}rst and H. Bojahr and O. Bolz and J. Contreras and R. Cornils and J. Cortina and S. Denninghoff and V. Fonseca and M. Girma and J. Gonzalez and N. G{\"o}tting and G. Heinzelmann and G. Hermann and A. Heusler and W. Hofmann and D. Horns and I. Jung and R. Kankanyan and M. Kestel and J. Kettler and A. Kohnle and A. Konopelko and H. Kornmeyer and D. Kranich and H. Krawczynski and H. Lampeitl and M. Lopez and E. Lorenz and F. Lucarelli and N. Magnussen and O. Mang and H. Meyer and R. Mirzoyan and A. Moralejo and E. Ona and L. Padilla and M. Panter and R. Plaga and A. Plyasheshnikov and G. P{\"u}hlhofer and G. Rauterberg and A. R{\"o}hring and W. Rhode and J. Robrade and G. Rowell and V. Sahakian and M. Samorski and M. Schilling and F. Schr{\"o}der and I. Sevilla and M. Siems and W. Stamm and M. Tluczykont and V{\"o}lk, {H. J.} and Wiedner, {C. A.} and W. Wittek",

year = "2002",

month = mar,

doi = "10.1051/0004-6361:20020206",

language = "English",

volume = "384",

pages = "L23--L26",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

number = "3",

}

Aharonian, F, Akhperjanian, A, Barrio, J, Beilicke, M, Bernlöhr, K, Börst, H, Bojahr, H, Bolz, O, Contreras, J, Cornils, R, Cortina, J, Denninghoff, S, Fonseca, V, Girma, M, Gonzalez, J, Götting, N, Heinzelmann, G, Hermann, G, Heusler, A, Hofmann, W, Horns, D, Jung, I, Kankanyan, R, Kestel, M, Kettler, J, 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, Röhring, A, Rhode, W, Robrade, J, Rowell, G, Sahakian, V, Samorski, M, Schilling, M, Schröder, F, Sevilla, I, Siems, M, Stamm, W, Tluczykont, M, Völk, HJ, Wiedner, CA & Wittek, W 2002, 'TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation', Astronomy and Astrophysics, vol. 384, no. 3, pp. L23-L26. https://doi.org/10.1051/0004-6361:20020206

TY - JOUR

T1 - TeV gamma rays from the blazar H 1426+428 and the diffuse extragalactic background radiation

AU - Aharonian, F.

AU - Akhperjanian, A.

AU - Barrio, J.

AU - Beilicke, M.

AU - Bernlöhr, K.

AU - Börst, H.

AU - Bojahr, H.

AU - Bolz, O.

AU - Contreras, J.

AU - Cornils, R.

AU - Cortina, J.

AU - Denninghoff, S.

AU - Fonseca, V.

AU - Girma, M.

AU - Gonzalez, J.

AU - Götting, N.

AU - Heinzelmann, G.

AU - Hermann, G.

AU - Heusler, A.

AU - Hofmann, W.

AU - Horns, D.

AU - Jung, I.

AU - Kankanyan, R.

AU - Kestel, M.

AU - Kettler, J.

AU - Kohnle, A.

AU - Konopelko, A.

AU - Kornmeyer, H.

AU - Kranich, D.

AU - Krawczynski, H.

AU - Lampeitl, H.

AU - Lopez, M.

AU - Lorenz, E.

AU - Lucarelli, F.

AU - Magnussen, N.

AU - Mang, O.

AU - Meyer, H.

AU - Mirzoyan, R.

AU - Moralejo, A.

AU - Ona, E.

AU - Padilla, L.

AU - Panter, M.

AU - Plaga, R.

AU - Plyasheshnikov, A.

AU - Pühlhofer, G.

AU - Rauterberg, G.

AU - Röhring, A.

AU - Rhode, W.

AU - Robrade, J.

AU - Rowell, G.

AU - Sahakian, V.

AU - Samorski, M.

AU - Schilling, M.

AU - Schröder, F.

AU - Sevilla, I.

AU - Siems, M.

AU - Stamm, W.

AU - Tluczykont, M.

AU - Völk, H. J.

AU - Wiedner, C. A.

AU - Wittek, W.

PY - 2002/3

Y1 - 2002/3

N2 - The detection of TeV γ-rays from the blazar H 1426+428 at an integral flux level of (4 ± 2stat ± 1syst) × 10-12 erg cm-2 s-1 above 1 TeV with the HEGRA imaging atmospheric Cherenkov telescope system is reported. H 1426+428 is located at a redshift of z = 0.129, which makes it the most distant source detected in TeV γ-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 ∝ 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.

AB - The detection of TeV γ-rays from the blazar H 1426+428 at an integral flux level of (4 ± 2stat ± 1syst) × 10-12 erg cm-2 s-1 above 1 TeV with the HEGRA imaging atmospheric Cherenkov telescope system is reported. H 1426+428 is located at a redshift of z = 0.129, which makes it the most distant source detected in TeV γ-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 ∝ 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.

KW - BL Lacertae objects: individual: H 1426+428

KW - Diffuse radiation

KW - Gamma rays: observations

UR - http://www.scopus.com/inward/record.url?scp=0036500893&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20020206

DO - 10.1051/0004-6361:20020206

M3 - Article

AN - SCOPUS:0036500893

SN - 0004-6361

VL - 384

SP - L23-L26

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

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

Abstract

Keywords

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