Very high energy gamma rays from the direction of Sagittarius A

被引：352

作者：

Aharonian, F

Akhperjanian, AG

Aye, KM

Bazer-Bachi, AR

Beilicke, M

Benbow, W

Berge, D

Berghaus, P

Bernlöhr, K

Bolz, O

Boisson, C

Borgmeier, C

Breitling, F

Brown, AM

Gordo, JB

Chadwick, PM

Chitnis, VR

Chounet, LM

Cornils, R

Costamante, L

Degrange, B

Djannati-Ataï, A

Drury, LO

Ergin, T

Espigat, P

Feinstein, F

Fleury, P

Fontaine, G

Funk, S

Gallant, Y

Giebels, B

Gillessen, S

Goret, P

Guy, J

Hadjichristidis, C

Hauser, M

Heinzelmann, G

Henri, G

Hermann, G

Hinton, JA

Hofmann, W

Holleran, M

Horns, D

de Jager, OC

Jung, I

Khélifi, B

Komin, N

Konopelko, A

Latham, IJ

Le Gallou, R

机构：

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

[2] Yerevan Phys Inst, Yerevan 375036, Armenia

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

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

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

[6] Coll France, CNRS, IN2P3, F-75231 Paris 05, France

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

[8] Observ Paris, CNRS, UMR 8102, LUTH,Sect Meudon, F-92195 Meudon, France

[9] Univ Montpellier 2, CNRS, IN2P3, Grp Astroparticules Montpellier, F-34095 Montpellier 5, France

[10] Univ Paris 06, CNRS, IN2P3, Lab Phys Nucl & Hautes Energies, F-75231 Paris 05, France

[11] Univ Paris 07, F-75231 Paris, France

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

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

[14] CE Saclay, DAPNIA DSM CEA, Serv Astrophys, F-91191 Gif Sur Yvette, France

[15] Landessternwarte Konigstuhl, D-69117 Heidelberg, Germany

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

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

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

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

[20] Univ Namibia, Windhoek, Namibia

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 425卷 / 01期

关键词：

gamma-rays : observations; Galaxy : centre;

D O I：

10.1051/0004-6361:200400055

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of a point-like source of very high energy (VHE) gamma-rays coincident within 1' of Sgr A* obtained with the HESS array of Cherenkov telescopes. The gamma-rays exhibit a power-law energy spectrum with a spectral index of -2.2+/-0.09+/-0.15 and a flux above the 165 GeV threshold of (1.82+/-0.22)x10(-7) m(-2) s(-1). The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.

引用

页码：L13 / L17

页数：5

共 31 条

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