Reanalysis of the high energy cutoff of the 1997 Mkn 501 TeV energy spectrum

被引：68

作者：

Aharonian, FA

Akhperjanian, AG

Barrio, JA

Bernlöhr, K

Bolz, O

Börst, H

Bojahr, H

Contreras, JL

Cortina, J

Denninghoff, S

Fonseca, V

Gonzalez, JC

Götting, N

Heinzelmann, G

Hermann, G

Heusler, A

Hofmann, W

Horns, D

Ibarra, A

Iserlohe, C

Jung, I

Kankanyan, R

Kestel, M

Kettler, J

Kohnle, A

Konopelko, A

Kornmeyer, H

Kranich, D

Krawczynski, H

Lampeitl, H

Lorenz, E

Lucarelli, F

Magnussen, N

Mang, O

Meyer, H

Mirzoyan, R

Moralejo, A

Padilla, L

Panter, M

Plaga, R

Plyasheshnikov, A

Prahl, J

Pühlhofer, G

Rhode, W

Röhring, A

Rowell, GP

Sahakian, V

Samorski, M

Schilling, M

Schröder, F

机构：

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

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

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

[4] Univ Hamburg, Inst Expt Phys 2, D-22761 Hamburg, Germany

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

[6] Berg Univ Gesamthsch Wuppertal, D-42097 Wuppertal, Germany

[7] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 366卷 / 01期

关键词：

galaxies : BL Lacertae objects : individual : Mkn 501; gamma-rays : observations;

D O I：

10.1051/0004-6361:20000098

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Data taken with the HEGRA system of imaging atmospheric Cherenkov telescopes during the 1997 flares of Markarian 501 (Mkn 501) are reanalyzed using an algorithm providing improved energy resolution. A resolution of 10% to 12% is obtained by accounting for the variation of the Cherenkov light yield with the height of the shower maximum in the atmosphere. The improved energy resolution is particularly relevant for the study of the high-energy cutoff in the spectrum, which might be caused by interactions with the intergalactic infrared background radiation. The reanalysis presented here confirms the results obtained in the previous analysis, but hints a steeper slope of the spectrum in the region around 20 TeV.

引用

页码：62 / 67

页数：6

共 27 条

[1]

Aharonian F, 1999, ASTRON ASTROPHYS, V349, P29

[2]

Aharonian FA, 1999, ASTRON ASTROPHYS, V349, P11

[3]

Aharonian FA, 1999, ASTRON ASTROPHYS, V342, P69

[4]

AHARONIAN FA, 2000, UNPUB APJ