OBSERVATIONS OF THE BLAZAR 3C 66A WITH THE MAGIC TELESCOPES IN STEREOSCOPIC MODE

被引：25

作者：

Aleksic, J. ^{[1
]}

Antonelli, L. A. ^{[2
]}

Antoranz, P. ^{[3
,4
]}

Backes, M. ^{[5
]}

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

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

Becerra Gonzalez, J. ^{[9
,10
]}

Bednarek, W. ^{[11
]}

Berdyugin, A. ^{[12
]}

Berger, K. ^{[9
]}

Bernardini, E. ^{[13
]}

Biland, A. ^{[14
]}

Blanch, O. ^{[1
]}

Bock, R. K. ^{[15
]}

Boller, A. ^{[14
]}

Bonnoli, G. ^{[2
]}

Bordas, P. ^{[16
]}

Tridon, D. Borla ^{[15
]}

Bosch-Ramon, V. ^{[16
]}

Bose, D. ^{[6
]}

Braun, I. ^{[14
]}

Bretz, T. ^{[17
]}

Camara, M. ^{[6
]}

Canellas, A. ^{[16
]}

Carmona, E. ^{[15
]}

Carosi, A. ^{[2
]}

Colin, P. ^{[15
]}

Colombo, E. ^{[9
]}

Contreras, J. L. ^{[6
]}

Cortina, J. ^{[1
]}

Cossio, L. ^{[18
,19
]}

Covino, S. ^{[2
]}

Dazzi, F. ^{[18
,19
]}

De Angelis, A. ^{[18
,19
]}

De Cea del Pozo, E. ^{[20
]}

De Lotto, B. ^{[18
,19
]}

De Maria, M. ^{[18
,19
]}

De Sabata, F. ^{[18
,19
]}

Delgado Mendez, C. ^{[9
]}

Diago Ortega, A. ^{[9
,10
]}

Doert, M. ^{[5
]}

Dominguez, A. ^{[21
]}

Prester, D. Dominis ^{[22
,23
]}

Dorner, D. ^{[14
]}

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

Elsaesser, D. ^{[17
]}

Errando, M. ^{[1
]}

Ferenc, D. ^{[22
,23
]}

Fonseca, M. V. ^{[6
]}

Font, L. ^{[24
]}

机构：

[1] IFAE, E-08193 Bellaterra, Spain

[2] INAF Natl Inst Astrophys, I-00136 Rome, Italy

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

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

[5] Tech Univ Dortmund, D-44221 Dortmund, Germany

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

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

[8] Ist Nazl Fis Nucl, I-35131 Padua, Italy

[9] Inst Astrofis Canarias, E-38200 Tenerife, Spain

[10] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain

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

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

[13] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany

[14] ETH, CH-8093 Zurich, Switzerland

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

[16] Univ Barcelona, ICC IEEC, E-08028 Barcelona, Spain

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

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

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

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

[21] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain

[22] Univ Rijeka, Croatian MAGIC Consortium, Inst R Boskovic, HR-10000 Zagreb, Croatia

[23] Univ Split, HR-10000 Zagreb, Croatia

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

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

[26] INAF Osservatorio Astron, I-34143 Trieste, Italy

[27] Ist Nazl Fis Nucl, I-34143 Trieste, Italy

[28] ICREA, E-08010 Barcelona, Spain

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

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

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 726卷 / 02期

基金：

芬兰科学院;

关键词：

BL Lacertae objects: individual (3C 66A); galaxies: active; gamma rays: galaxies; BL LACERTAE OBJECTS; EXTRAGALACTIC BACKGROUND LIGHT; HIGH-ENERGY EMISSION; GAMMA-RAY EMISSION; CHERENKOV TELESCOPE; PROTON BLAZAR; LAC OBJECTS; TEV BLAZARS; X-RAY; SPECTRA;

D O I：

10.1088/0004-637X/726/2/58

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report new observations of the intermediate-frequency peaked BL Lacertae object 3C 66A with the MAGIC telescopes. The data sample we use were taken in 2009 December and 2010 January, and comprises 2.3 hr of good quality data in stereoscopic mode. In this period, we find a significant signal from the direction of the blazar 3C 66A. The new MAGIC stereoscopic system is shown to play an essential role for the separation between 3C 66A and the nearby radio galaxy 3C 66B, which is at a distance of only 6'. The derived integral flux above 100 GeV is 8.3% of the Crab Nebula flux and the energy spectrum is reproduced by a power law of photon index 3.64 +/- 0.39(stat) +/- 0.25(sys). Within errors, this is compatible with the one derived by VERITAS in 2009. From the spectra corrected for absorption by the extragalactic background light, we only find small differences between the four models that we applied, and constrain the redshift of the blazar to z < 0.68.

引用

页数：5

共 47 条

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