Evidence for TeV gamma ray emission from Cassiopeia A

被引：220

作者：

Aharonian, F

Akhperjanian, A

Barrio, J

Bernlöhr, K

Börst, H

Bojahr, H

Bolz, O

Contreras, J

Cortina, J

Denninghoff, S

Fonseca, V

Gonzalez, J

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

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

Prahl, J

Pühlhofer, G

Rauterberg, G

Röhring, A

Rhode, W

Rowell, GP

Sahakian, V

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] Univ Gesamthsch Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany

[7] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 370卷 / 01期

关键词：

ISM : supernova remnants; ISM : individual objects : Cassiopeia A; cosmic rays; gamma rays : observations;

D O I：

10.1051/0004-6361:20010243

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV gamma -ray emission was detected at the 5 sigma level, and a flux of (5.8 +/- 1.2(stat) +/- 1.2(syst)) 10(-9) ph m(-2) s(-1) above 1 TeV was derived. The spectral distribution is consistent with a power law with a differential spectral index of -2.5 +/- 0.4(stat) +/- 0.1(syst) between 1 and 10 TeV. As this is the first report of the detection of a TeV gamma -ray source on the "centi-Crab" scale, we present the analysis in some detail. Implications for the acceleration of cosmic rays depend on the details of the source modeling. Sire discuss some important aspects in this paper.

引用

页码：112 / 120

页数：9

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