VHE γ-ray observation of the Crab Nebula and its pulsar with the MAGIC telescope

被引：259

作者：

Albert, J. ^{[1
]}

Aliu, E. ^{[2
]}

Anderhub, H. ^{[3
]}

Antoranz, P. ^{[4
]}

Armada, A. ^{[2
]}

Baixeras, C. ^{[5
]}

Barrio, J. A. ^{[4
]}

Bartko, H. ^{[6
]}

Bastieri, D. ^{[7
,8
]}

Becker, J. K. ^{[9
]}

Bednarek, W. ^{[10
]}

Berger, K. ^{[1
]}

Bigongiari, C. ^{[7
,8
]}

Biland, A. ^{[3
]}

Bock, R. K. ^{[6
,7
]}

Bordas, P. ^{[11
]}

Bosch-Ramon, V. ^{[11
]}

Bretz, T. ^{[1
]}

Britvitch, I. ^{[3
]}

Camara, M. ^{[4
]}

Carmona, E. ^{[6
]}

Chilingarian, A. ^{[12
]}

Coarasa, J. A. ^{[6
]}

Commichau, S. ^{[3
]}

Contreras, J. L. ^{[4
]}

Cortina, J. ^{[2
]}

Costado, M. T. ^{[13
]}

Curtef, V. ^{[9
]}

Danielyan, V. ^{[12
]}

Dazzi, F. ^{[7
,8
]}

De Angelis, A. ^{[14
,15
]}

Delgado, C. ^{[13
]}

de los Reyes, R. ^{[4
]}

De Lotto, B. ^{[14
,15
]}

Domingo-Santamaria, E. ^{[2
]}

Dorner, D. ^{[1
]}

Doro, M. ^{[7
,8
]}

Errando, M. ^{[2
]}

Fagiolini, M. ^{[16
,17
]}

Ferenc, D. ^{[18
]}

Fernandez, E. ^{[2
]}

Firpo, R. ^{[2
]}

Flix, J. ^{[2
]}

Fonseca, M. V. ^{[4
]}

Font, L. ^{[5
]}

Fuchs, M.

Galante, N. ^{[6
]}

Garcia-Lopez, R. ^{[13
]}

Garczarczyk, M. ^{[6
]}

Gaug, M. ^{[7
,8
]}

机构：

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

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

[3] ETH, CH-8093 Zurich, Switzerland

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

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

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

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

[8] Ist Nazl Fis Nucl, 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] Inst Astrofis Canarias, E-38200 Tenerife, Spain

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

[15] INFN Trieste, I-33100 Udine, Italy

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

[17] INFN Pisa, I-53100 Siena, Italy

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

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

[20] Turku Univ, Tuorla Observ, FI-21500 Piikkio, Finland

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

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

[23] INFN Trieste, I-34131 Trieste, Italy

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

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

[26] ICREA, E-08193 Barcelona, Spain

[27] IEEC CSIC, Inst Ciencies Espai, E-08193 Barcelona, Spain

来源：

ASTROPHYSICAL JOURNAL | 2008年 / 674卷 / 02期

关键词：

acceleration of particles; gamma rays : observations; pulsars : individual (PSR B0531+21); radiation mechanisms : nonthermal;

D O I：

10.1086/525270

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report about very high energy (VHE) gamma-ray observations of the Crab Nebula with the MAGIC telescope. The gamma-ray flux from the nebula was measured between 60 GeV and 9 TeV. The energy spectrum can be described by a curved power law dF/dE = f(0)(E/300 GeV)([a+b log)((E/300 GeV)])(10) with a flux normalization f(0) of (6.0 +/- 0.2(stat)) x 10(-10) cm(-2) s(-1) TeV-1, a = 2.31 +/- 0.06(stat), and b = 0.26 +/- 0.07(stat). The peak in the spectral energy distribution is estimated at 77 +/- 35 GeV. Within the observation time and the experimental resolution of the telescope, the gamma-ray emission is steady and pointlike. The emission's center of gravity coincides with the position of the pulsar. Pulsed gamma-ray emission from the pulsar could not be detected. We constrain the cutoff energy of the pulsed spectrum to be less than 27 GeV, assuming that the differential energy spectrum has an exponential cutoff. For a superexponential shape, the cutoff energy can be as high as 60 GeV.

引用

页码：1037 / 1055

页数：19

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