HESS observations of the Crab during its March 2013 GeV gamma-ray flare

被引：32

作者：

Collaboration, H. E. S. S.

Abramowski, A. ^{[1
]}

Aharonian, F. ^{[2
,3
,4
]}

Benkhali, F. Ait ^{[2
]}

Akhperjanian, A. G. ^{[4
,5
]}

Anguener, E. ^{[6
]}

Anton, G. ^{[7
]}

Balenderan, S. ^{[8
]}

Balzer, A. ^{[9
,10
]}

Barnacka, A. ^{[11
]}

Becherini, Y. ^{[12
]}

Tjus, J. Becker ^{[13
]}

Bernloehr, K. ^{[2
,6
]}

Birsin, E. ^{[6
]}

Bissaldi, E. ^{[14
]}

Biteau, J. ^{[15
]}

Boettcher, M. ^{[16
]}

Boisson, C. ^{[17
]}

Bolmont, J. ^{[18
]}

Bordas, P. ^{[19
]}

Brucker, J. ^{[7
]}

Brun, F. ^{[2
]}

Brun, P. ^{[20
]}

Bulik, T. ^{[21
]}

Carrigan, S. ^{[2
]}

Casanova, S. ^{[2
,16
]}

Cerruti, M. ^{[17
,22
]}

Chadwick, P. M. ^{[8
]}

Chalme-Calvet, R. ^{[18
]}

Chaves, R. C. G. ^{[20
]}

Cheesebrough, A. ^{[8
]}

Chretien, M. ^{[18
]}

Colafrancesco, S. ^{[23
]}

Cologna, G. ^{[24
]}

Conrad, J. ^{[25
,26
]}

Couturier, C. ^{[18
]}

Cui, Y. ^{[19
]}

Dalton, M. ^{[27
]}

Daniel, M. K. ^{[8
]}

Davids, I. D. ^{[16
,28
]}

Degrange, B. ^{[15
]}

Deil, C. ^{[2
]}

de Wilt, P. ^{[29
]}

Dickinson, H. J. ^{[25
]}

Djannati-Atai, A. ^{[30
]}

Domainko, W. ^{[2
]}

Drury, L. O'C. ^{[3
]}

Dubus, G. ^{[31
]}

Dutson, K. ^{[32
]}

Dyks, J. ^{[11
]}

机构：

[1] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[2] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

[3] Dublin Inst Adv Studies, Dublin 2, Ireland

[4] Natl Acad Sci Republ Armenia, Yerevan, Armenia

[5] Yerevan Phys Inst, Yerevan 375036, Armenia

[6] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[7] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

[8] Univ Durham, Dept Phys, Durham DH1 3LE, England

[9] DESY, D-15738 Zeuthen, Germany

[10] Univ Potsdam, Inst Phys & Astron, D-14476 Golm, Germany

[11] Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland

[12] Linnaeus Univ, Dept Phys & Elect Engn, S-35195 Vaxjo, Sweden

[13] Ruhr Univ Bochum, Inst Theoret Phys, D-44780 Bochum, Germany

[14] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria

[15] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[16] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa

[17] Univ Paris Diderot, CNRS, Observ Paris, LUTH, F-92190 Meudon, France

[18] Univ Paris 06, Univ Paris 07, CNRS IN2P3, LPNHE, F-75252 Paris 5, France

[19] Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany

[20] CEA Saclay, DSM Irfu, F-91191 Gif Sur Yvette, France

[21] Univ Warsaw, Astron Observ, PL-00478 Warsaw, Poland

[22] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[23] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[24] Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany

[25] Univ Stockholm, Albanova Univ Ctr, Oskar Klein Ctr, Dept Phys, S-10691 Stockholm, Sweden

[26] Wallenberg Acad, Stockholm, Sweden

[27] Univ Bordeaux 1, CNRS IN2P3, Ctr Etudes Nucl Bordeaux Gradignan, F-33175 Gradignan, France

[28] Univ Namibia, Dept Phys, Windhoek, Namibia

[29] Univ Adelaide, Sch Chem & Phys, Adelaide, SA 5005, Australia

[30] Univ Paris Diderot, CNRS IN2P3, CEA Irfu, APC,Sorbonne Paris Cite, F-75205 Paris, France

[31] UJF Grenoble, CNRS INSU 1, IPAG, UMR 5274, F-38041 Grenoble, France

[32] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[33] Inst Fizyki Jadrowej PAN, PL-31342 Krakow, Poland

[34] Univ Montpellier 2, CNRS IN2P3, Lab Univ & Particules Montpellier, F-34095 Montpellier 5, France

[35] Univ Savoie, CNRS IN2P3, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France

[36] Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, PL-30244 Krakow, Poland

[37] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland

[38] Univ Free State, Dept Phys, ZA-9300 Bloemfontein, South Africa

[39] Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, CR-18000 Prague, Czech Republic

来源：

ASTRONOMY & ASTROPHYSICS | 2014年 / 562卷

基金：

新加坡国家研究基金会; 英国科学技术设施理事会;

关键词：

gamma rays: ISM; ISM: individual objects: Crab nebula; radiation mechanisms: non-thermal; relativistic processes; HIGH-ENERGY; PARTICLE-ACCELERATION; STANDARD CANDLE; NEBULA FLARE; EMISSION; PULSAR; VARIABILITY; COMPTON; TEV; ASTROPHYSICS;

D O I：

10.1051/0004-6361/201323013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. On March 4, 2013 the Fermi-EAT and AGILE reported a flare from the direction of the Crab nebula in which the high-energy (HE; E > 100 MeV) flux was six times above its quiescent level. Simultaneous observations in other energy bands give us hints about the emission processes during the flare episode and the physics of pulsar wind nebulae in general. Aims. We search for variability in the emission of the Crab nebula at very-high energies (VHF,; E > 100 GeV), using contemporaneous data taken with the H.E.S.S. array of Cherenkov telescopes. Methods. Observational data taken with the H.E.S.S. instrument on five consecutive days during the flare were analysed for the flux and spectral shape of the emission from the Crab nebula. Night-wise light curves are presented with energy thresholds of 1 TeV and 5 TeV. Results. The observations conducted with H.E.S.S. on March 6 to March 10, 2013 show no significant changes in the flux. They limit the variation in the integral flux above 1 TeV to less than 63% and the integral flux above 5 TeV to less than 78% at a 95% confidence level.

引用

页数：5

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