Search for VHE gamma-ray emission from Geminga pulsar and nebula with the MAGIC telescopes

被引：21

作者：

Ahnen, M. L. ^{[1
]}

Ansoldi, S. ^{[2
,3
]}

Antonelli, L. A. ^{[4
]}

Antoranz, P. ^{[5
,6
]}

Babic, A. ^{[7
,8
,9
,10
,11
]}

Banerjee, B. ^{[12
]}

Bangale, P. ^{[13
]}

Barres de Almeida, U. ^{[13
,45
]}

Barrio, J. A. ^{[14
]}

Becerra Gonzalez, J. ^{[15
,16
,46
,47
,48
]}

Bednarek, W. ^{[17
]}

Bernardini, E. ^{[18
,49
]}

Berti, A. ^{[2
,3
,50
]}

Biasuzzi, B. ^{[2
,3
]}

Biland, A. ^{[1
]}

Blanch, O. ^{[19
]}

Bonnefoy, S. ^{[14
]}

Bonnoli, G. ^{[4
]}

Borracci, F. ^{[13
]}

Bretz, T. ^{[20
,51
]}

Buson, S. ^{[21
,22
]}

Carosi, A. ^{[4
]}

Chatterjee, A. ^{[12
]}

Clavero, R. ^{[15
,16
]}

Colin, P. ^{[13
]}

Colombo, E. ^{[15
,16
]}

Contreras, J. L. ^{[14
]}

Cortina, J. ^{[19
]}

Covino, S. ^{[4
]}

Da Vela, P. ^{[5
,6
]}

Dazzi, F. ^{[13
]}

De Angelis, A. ^{[21
,22
]}

De Lotto, B. ^{[2
,3
]}

de Ona Wilhelmi, E. ^{[23
]}

Di Pierro, F. ^{[4
]}

Doert, M. ^{[24
]}

Dominguez, A. ^{[14
]}

Prester, D. Dominis ^{[7
,8
,9
,10
,11
]}

Dorner, D. ^{[20
]}

Doro, M. ^{[21
,22
]}

Einecke, S. ^{[24
]}

Glawion, D. Eisenacher ^{[20
]}

Elsaesser, D. ^{[24
]}

Ramazani, V. Fallah ^{[25
,26
,27
,28
]}

Fernandez-Barral, A. ^{[19
]}

Fidalgo, D. ^{[14
]}

Fonseca, M. V. ^{[14
]}

Font, L. ^{[29
,30
]}

Frantzen, K. ^{[24
]}

Fruck, C. ^{[13
]}

机构：

[1] Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland

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

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

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

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

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

[7] Croatian MAGIC Consortium, Zagreb, Croatia

[8] Rudjer Boskovic Inst, Zagreb, Croatia

[9] Univ Rijeka, Rijeka, Croatia

[10] Univ Split, Split, Croatia

[11] Univ Zagreb, Zagreb, Croatia

[12] Saha Inst Nucl Phys, Sect 1, 1-AF Bidhannagar, Kolkata 700064, India

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

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

[15] Inst Astrofis Canarias, Tenerife 38200, Spain

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

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

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

[19] Barcelona Inst Sci & Technol, IFAE, Campus UAB, Bellaterra 08193, Barcelona, Spain

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

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

[22] INFN, I-35131 Padua, Italy

[23] CSIC, IEEC, Inst Space Sci, Barcelona 08193, Spain

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

[25] Finnish MAGIC Consortium, Turku, Finland

[26] Tuorla Observ, Piikkio, Finland

[27] Univ Turku, SF-20500 Turku, Finland

[28] Univ Oulu, Astron Div, Oulu, Finland

[29] Univ Autonoma Barcelona, Dept Fis, Unitat Fis Radiac, Bellaterra 08193, Spain

[30] Univ Autonoma Barcelona, CERES IEEC, Bellaterra 08193, Spain

[31] Univ Barcelona, ICC, IEEC UB, Barcelona 08028, Spain

[32] Japanese MAGIC Consortium, Kyoto, Japan

[33] ICRR, Kyoto, Japan

[34] Univ Tokyo, Tokyo 1138654, Japan

[35] Kyoto Univ, Dept Phys, Kyoto 6068501, Japan

[36] Kyoto Univ, Hakubi Ctr, Kyoto 6068501, Japan

[37] Tokai Univ, Hiratsuka, Kanagawa 25912, Japan

[38] Univ Tokushima, Tokushima, Japan

[39] KEK, Tsukuba, Ibaraki, Japan

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

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

[42] INFN Pisa, I-56126 Pisa, Italy

[43] ICREA, Barcelona 08193, Spain

[44] CSIC, IEEC, Inst Space Sci, Barcelona 08193, Spain

[45] MCTI, CBPF, R Dr Xavier Sigaud,150 Urca, BR-22290180 Rio De Janeiro, Brazil

[46] NASA, Goddard Space Flight Ctr, Code 661, Greenbelt, MD 20771 USA

[47] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[48] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[49] Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany

[50] Univ Trieste, Trieste, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2016年 / 591卷

基金：

芬兰科学院;

关键词：

astroparticle physics; stars: neutron; pulsars: general; LARGE-AREA TELESCOPE; HIGH-ENERGY EMISSION; RAPIDLY SPINNING PULSARS; CRAB PULSAR; CURVATURE-RADIATION; MAJOR UPGRADE; 1E 0630+178; SLOT GAPS; MODEL; CATALOG;

D O I：

10.1051/0004-6361/201527722

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Geminga pulsar, one of the brighest gamma-ray sources, is a promising candidate for emission of very-high-energy (VHE > 100 GeV) pulsed gamma rays. Also, detection of a large nebula has been claimed by water Cherenkov instruments. We performed deep observations of Geminga with the MAGIC telescopes, yielding 63 h of good-quality data, and searched for emission from the pulsar and pulsar wind nebula. We did not find any significant detection, and derived 95% confidence level upper limits. The resulting upper limits of 5.3 x 10(-13) TeV cm(-2) s(-1) for the Geminga pulsar and 3.5 x 10(-12) TeV cm(-2) s(-1) for the surrounding nebula at 50 GeV are the most constraining ones obtained so far at VHE. To complement the VHE observations, we also analyzed 5 yr of Fermi-LAT data from Geminga, finding that the sub-exponential cut-off is preferred over the exponential cut-off that has been typically used in the literature. We also find that, above 10 GeV, the gamma-ray spectra from Geminga can be described with a power law with index softer than 5. The extrapolation of the power-law Fermi-LAT pulsed spectra to VHE goes well below the MAGIC upper limits, indicating that the detection of pulsed emission from Geminga with the current generation of Cherenkov telescopes is very difficult.

引用

页数：7

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