Discovery of a VHE gamma-ray source coincident with the supernova remnant CTB 37A

被引：59

作者：

Aharonian, F. ^{[1
,13
]}

Akhperjanian, A. G. ^{[2
]}

de Almeida, U. Barres ^{[8
]}

Bazer-Bachi, A. R. ^{[3
]}

Behera, B. ^{[14
]}

Beilicke, M. ^{[4
]}

Benbow, W. ^{[1
]}

Bernloehr, K. ^{[1
,5
]}

Boisson, C. ^{[6
]}

Borrel, V. ^{[3
]}

Braun, I. ^{[1
]}

Brion, E. ^{[7
]}

Brucker, J. ^{[16
]}

Buehler, R. ^{[1
]}

Bulik, T. ^{[24
]}

Buesching, I. ^{[9
]}

Boutelier, T. ^{[17
]}

Carrigan, S. ^{[1
]}

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

Chaves, R. ^{[1
]}

Chounet, L. -M. ^{[10
]}

Clapson, A. C. ^{[1
]}

Coignet, G. ^{[11
]}

Cornils, R. ^{[4
]}

Costamante, L. ^{[1
,28
]}

Dalton, M. ^{[5
]}

Degrange, B. ^{[10
]}

Dickinson, H. J. ^{[8
]}

Djannati-Atai, A. ^{[12
,16
]}

Domainko, W. ^{[1
]}

Drury, I. O'C. ^{[13
]}

Dubois, F. ^{[11
]}

Dubus, G. ^{[17
]}

Dyks, J. ^{[24
]}

Egberts, K. ^{[1
]}

Emmanoulopoulos, D. ^{[14
]}

Espigat, P. ^{[12
]}

Farnier, C. ^{[15
]}

Feinstein, F. ^{[15
]}

Fiasson, A. ^{[15
]}

Foerster, A. ^{[1
]}

Fontaine, G. ^{[10
]}

Funk, S. ^{[29
]}

Fuessling, M. ^{[5
]}

Gabici, S. ^{[13
]}

Gallant, Y. A. ^{[15
]}

Giebels, B. ^{[10
]}

Glicenstein, J. F. ^{[7
]}

Glueck, B. ^{[16
]}

Goret, P. ^{[7
]}

机构：

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

[2] Yerevan Phys Inst, Yerevan 375036, Armenia

[3] Ctr Etud Spatiale Rayonnements, CNRS, UPS, F-31029 Toulouse 4, France

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

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

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

[7] CE Saclay, CEA, DSM, IRFU, F-91191 Gif Sur Yvette, France

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

[9] North West Univ, Unit Space Phys, ZA-2520 Potchefstroom, South Africa

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

[11] CNRS, IN2P3, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France

[12] Univ Paris 07, CEA, Observ Paris, CNRS,UMR 7164,, F-75205 Paris 13, France

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

[14] Heidelberg Univ, D-69117 Heidelberg, Germany

[15] Univ Montpellier 2, CNRS, IN2P3, Lab Phys Theor & Astroparticules, F-34095 Montpellier 5, France

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

[17] Univ Grenoble 1, CNRS, INSU, Astrophys Lab, F-38041 Grenoble 9, France

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

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

[20] Charles Univ Prague, Inst Nucl & Particle Phys, CR-18000 Prague 8, Czech Republic

[21] Ruhr Univ Bochum, Lehrstuhl Weltraum & Astrophys 4, Inst Theoret Phys, D-44780 Bochum, Germany

[22] Univ Namibia, Windhoek, Namibia

[23] Uniwersytet Jagiellonski, Obserwatorium Astronomiczne, Krakow, Poland

[24] Nicholas Copernicus Astron Ctr, Warsaw, Poland

[25] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

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

[27] Nicholas Copernicus Univ, Torun Ctr Astron, Torun, Poland

[28] European Associated Lab Gamma Ray Astron, F-75700 Paris, France

[29] Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA

[30] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan

[31] Univ Bordeaux 1, Ctr Etud Nucl Bordeaux Gradignan, UMR 5797, CNRS,IN2P3, F-33175 Gradignan, France

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 490卷 / 02期

基金：

英国科学技术设施理事会; 新加坡国家研究基金会;

关键词：

ISM: supernova remnants; gamma rays: observations; X-rays: individuals: G348.5+0.1;

D O I：

10.1051/0004-6361:200809722

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. The supernova remnant (SNR) complex CTB 37 is an interesting candidate for observations with very high energy (VHE) gamma-ray telescopes such as HESS. In this region, three SNRs are seen. One of them is potentially associated with several molecular clouds, a circumstance that can be used to probe the acceleration of hadronic cosmic rays. Methods. This region was observed with the HESS Cherenkov telescopes and the data were analyzed with standard HESS procedures. Recent X-ray observations with Chandra and XMM-Newton were used to search for X-ray counterparts. Results. The discovery of a new VHE gamma-ray source HESS J1714-385 coincident with the remnant CTB 37A is reported. The energy spectrum is well described by a power-law with a photon index of Gamma = 2.30 +/- 0.13 and a differential flux at 1 TeV of Phi(0) = (8.7 +/- 1.0(stat) +/- 1.8(sys)) x 10(-13) cm(-2) s(-1) TeV-1. The integrated flux above 1 TeV is equivalent to 3% of the flux of the Crab nebula above the same energy. This VHE gamma-ray source is a counterpart candidate for the unidentified EGRET source 3EG J1714-3857. The observed VHE emission is consistent with the molecular gas distribution around CTB 37A; a close match is expected in a hadronic scenario for gamma-ray production. The X-ray observations reveal the presence of thermal X-rays from the NE part of the SNR. In the NW part of the remnant, an extended non-thermal X-ray source, CXOU J171419.8-383023, is discovered as well. Possible connections of the X-ray emission to the newly found VHE source are discussed.

引用

页码：685 / 693

页数：9

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