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

被引：101

作者：

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

机构：

[1] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

[2] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[3] Univ Complutense, Fac Ciencias Fis, E-28040 Madrid, Spain

[4] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[5] Univ Kiel, Inst Expt & Angew Phys, D-24118 Kiel, Germany

[6] Berg Univ Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany

[7] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 384卷 / 03期

关键词：

BL Lacertae objects : individual : H 1426+428; gamma rays : observations; diffuse radiation;

D O I：

10.1051/0004-6361:20020206

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：L23 / L26

页数：4

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