Observation of VHE γ-rays from Cassiopeia A with the MAGIC telescope

被引：107

作者：

Albert, J. ^{[1
]}

Aliu, E.

Anderhub, H.

Antoranz, P.

Armada, A.

Baixeras, C.

Barrio, J. A.

Bartko, H.

Bastieri, D.

Becker, J. K.

Bednarek, W.

Berger, K.

Bigongiari, C.

Biland, A.

Bock, R. K.

Bordas, P.

Bosch-Ramon, V.

Bretz, T.

Britvitch, I.

Camara, M.

Carmona, E.

Chilingarian, A.

Coarasa, J. A.

Commichau, S.

Contreras, J. L.

Cortina, J.

Costado, M. T.

Curtef, V.

Danielyan, V.

Dazzi, F.

De Angelis, A.

Delgado, C.

de los Reyes, R.

De Lotto, B.

Domingo-Santamaria, E.

Dorner, D.

Doro, M.

Errando, M.

Fagiolini, M.

Ferenc, D.

Fernandez, E.

Firpo, R.

Flix, J.

Fonseca, M. V.

Font, L.

Fuchs, M.

Galante, N.

Garcia-Lopez, R.

Garczarczyk, M.

Gaug, M.

机构：

[1] Univ Wurzburg, D-97074 Wurzburg, Germany

[2] Inst Fis Altes Energies, Barcelona 08193, Spain

[3] ETH, CH-8093 Zurich, Switzerland

[4] Univ Complutense, E-28040 Madrid, Spain

[5] Univ Autonoma Barcelona, E-08193 Barcelona, Spain

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

[7] Univ Padua, I-35131 Padua, Italy

[8] INFN, I-35131 Padua, Italy

[9] Univ Dortmund, D-44227 Dortmund, Germany

[10] Univ Lodz, PL-90236 Lodz, Poland

[11] Univ Barcelona, E-08028 Barcelona, Spain

[12] Yerevan Phys Inst, Yerevan 375036, Armenia

[13] Turku Univ, Turola Observ, Piikkio 21500, Finland

[14] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain

[15] Univ Udine, I-33100 Udine, Italy

[16] INFN, I-33100 Udine, Italy

[17] Univ Siena, I-53100 Siena, Italy

[18] INFN, I-53100 Siena, Italy

[19] Univ Calif Davis, Davis, CA 95616 USA

[20] Humboldt Univ, D-12489 Berlin, Germany

[21] Inst Nucl Energy Res, Sofia 1784, Bulgaria

[22] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy

[23] Ist Nazl Fis Nucl, I-34131 Trieste, Italy

[24] Univ Pisa, I-56126 Pisa, Italy

[25] Ist Nazl Fis Nucl, I-56126 Pisa, Italy

[26] ICREA, Bellaterra 08193, Spain

[27] Inst Ciencies Espai, CSIC, IEEC, Bellaterra 08193, Spain

来源：

ASTRONOMY & ASTROPHYSICS | 2007年 / 474卷 / 03期

关键词：

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

D O I：

10.1051/0004-6361:20078168

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. We searched for very high energy (VHE)gamma-ray emission from the supernova remnant Cassiopeia A Methods. The shell-type supernova remnant Cassiopeia A was observed with the 17 m MAGIC telescope between July 2006 and January 2007 for a total time of 47 h. Results. The source was detected above an energy of 250 GeV with a significance of 5.2s and a photon flux above 1 TeV of (7.3 +/- 0.7(stat) +/- 2.2(sys)) x 10(-13) cm(-2)s(-1). The photon spectrum is compatible with a power law dN/dE proportional to E-r with a photon index Gamma = 2.3 +/- 0.2(stat) +/- 0.2(sys). The source is point- like within the angular resolution of the telescope.

引用

页码：937 / 940

页数：4

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