MAGIC CONSTRAINTS ON γ-RAY EMISSION FROM CYGNUS X-3

被引:46
作者
Aleksic, J. [1 ]
Antonelli, L. A. [2 ]
Antoranz, P. [3 ,4 ]
Backes, M. [5 ]
Baixeras, C. [6 ]
Barrio, J. A. [7 ]
Bastieri, D. [8 ,9 ]
Gonzalez, J. Becerra [10 ,11 ]
Bednarek, W. [12 ]
Berdyugin, A. [13 ]
Berger, K. [13 ]
Bernardini, E. [14 ]
Biland, A. [15 ]
Blanch, O. [1 ]
Bock, R. K. [16 ]
Boller, A. [15 ]
Bonnoli, G. [2 ]
Bordas, P. [17 ]
Tridon, D. Borla [16 ]
Bosch-Ramon, V. [18 ]
Bose, D. [7 ]
Braun, I. [15 ]
Bretz, T. [18 ]
Britzger, D. [16 ]
Camara, M. [7 ]
Carmona, E. [16 ]
Carosi, A. [2 ]
Colin, P. [16 ]
Contreras, J. L. [7 ]
Cortina, J. [1 ]
Costado, M. T. [10 ,11 ]
Covino, S. [2 ]
Dazzi, F. [19 ]
De Angelis, A. [19 ]
Del Pozo, E. De Cea [20 ]
De Lotto, B. [19 ]
De Maria, M. [19 ]
De Sabata, F. [19 ]
Mendez, C. Delgado [10 ]
Doert, M.
Dominguez, A. [21 ]
Prester, D. Dominis [22 ,23 ]
Dorner, D. [15 ]
Doro, M. [8 ,9 ]
Elsaesser, D. [18 ]
Errando, M. [1 ]
Ferenc, D. [22 ,23 ]
Fonseca, M. V. [7 ]
Font, L. [6 ]
Lopez, R. J. Garcia [10 ,11 ]
机构
[1] IFAE, E-08193 Barcelona, 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 Autonoma Barcelona, E-08193 Barcelona, Spain
[7] Univ Complutense, E-28040 Madrid, Spain
[8] Univ Padua, I-35131 Padua, Italy
[9] Ist Nazl Fis Nucl, I-35131 Padua, Italy
[10] Inst Astrofis Canarias, E-38200 Tenerife, Spain
[11] Dept Astrofis, E-38206 Tenerife, Spain
[12] Univ Lodz, PL-90236 Lodz, Poland
[13] Univ Turku, Tuorla Observ, FI-21500 Piikkio, Finland
[14] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany
[15] Swiss Fed Inst Technol, CH-8293 Zurich, Switzerland
[16] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[17] Univ Barcelona, ICC, IEEC, E-08028 Barcelona, Spain
[18] Univ Wurzburg, D-97074 Wurzburg, Germany
[19] Univ Udine, I-33100 Udine, Italy
[20] Inst Ciencies Espai IEEC CSIC, E-08193 Barcelona, Spain
[21] Inst Astrofis Andalucia, CSIC, E-18080 Granada, Spain
[22] Univ Split, HR-10000 Zagreb, Croatia
[23] Univ Rijeka, Inst R Boskov, HR-10000 Zagreb, Croatia
[24] Univ Calif Davis, Davis, CA 95616 USA
[25] Inst Nucl Energy Res, BG-1784 Sofia, Bulgaria
[26] INAF Osserv 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
[31] INAF IASF, Bologna, Italy
[32] CALTECH, Owens Valley Radio Observ, Pasadena, CA 91125 USA
[33] Univ Roma Tor Vergata, I-00133 Rome, Italy
[34] Ist Nazl Fis Nucl, I-00133 Rome, Italy
[35] Cavendish Lab, Cambridge CB3 0HE, England
[36] INAF IASF, I-00133 Rome, Italy
[37] Special Astrophys Observ RAS, Nizhnii Arkhyz, Russia
基金
俄罗斯基础研究基金会;
关键词
acceleration of particles; binaries: general; gamma rays: general; methods: observational; X-rays: binaries; HIGH-ENERGY EMISSION; X-RAY; RELATIVISTIC JET; CRAB-NEBULA; RADIO; PULSAR; TEV; VARIABILITY; MODULATION; RADIATION;
D O I
10.1088/0004-637X/721/1/843
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Cygnus X-3 is a microquasar consisting of an accreting compact object orbiting around a Wolf-Rayet star. It has been detected at radio frequencies and up to high-energy. rays (above 100 MeV). However, many models also predict a very high energy (VHE) emission (above hundreds of GeV) when the source displays relativistic persistent jets or transient ejections. Therefore, detecting such emission would improve the understanding of the jet physics. The imaging atmospheric Cherenkov telescope MAGIC observed Cygnus X-3 for about 70 hr between 2006 March and 2009 August in different X-ray/radio spectral states and also during a period of enhanced gamma-ray emission. MAGIC found no evidence for a VHE signal from the direction of the microquasar. An upper limit to the integral flux for energies higher than 250 GeV has been set to 2.2 x 10(-12) photons cm(-2) s(-1) (95% confidence level). This is the best limit so far to the VHE emission from this source. The non-detection of a VHE signal during the period of activity in the high-energy band sheds light on the location of the possible VHE radiation favoring the emission from the innermost region of the jets, where absorption is significant. The current and future generations of Cherenkov telescopes may detect a signal under precise spectral conditions.
引用
收藏
页码:843 / 855
页数:13
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