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Journal Articles Astronomy and Astrophysics - A&A Year : 2004

Very high-energy gamma rays from the direction of Sagittarius A

F. Aharonian
A.G. Akhperjanian
  • Function : Author
K.-M. Aye
  • Function : Author
M. Beilicke
  • Function : Author
W. Benbow
  • Function : Author
D. Berge
K. Bernlohr
  • Function : Author
O. Bolz
  • Function : Author
C. Boisson
C. Borgneier
  • Function : Author
F. Breitling
  • Function : Author
A.M. Brown
  • Function : Author
P.M. Chadwick
  • Function : Author
R. Cornils
  • Function : Author
L.O'C. Drury
  • Function : Author
T. Ergin
  • Function : Author
S. Funk
  • Function : Author
S. Gillessen
C. Hadjichristidis
  • Function : Author
M. Hauser
  • Function : Author
G. Heinzelmann
  • Function : Author
G. Hermann
  • Function : Author
M. Holleran
  • Function : Author
D. Horns
O.C. De Jager
  • Function : Author
I. Jung
B. Khelifi
Nu. Komin
A. Konopelko
  • Function : Author
I.J. Latham
  • Function : Author
R. Le Gallou
  • Function : Author
N. Leroy
T. Lohse
C. Masterson
  • Function : Author
T.J.L. Mccomb
  • Function : Author
S.J. Nolan
  • Function : Author
A. Noutsos
  • Function : Author
K.J. Orford
  • Function : Author
M. Panter
  • Function : Author
M. Pohl
  • Function : Author
G. Puhlhofer
  • Function : Author
B.C. Raubenheimer
  • Function : Author
M. Raue
  • Function : Author
A. Reimer
O. Reimer
  • Function : Author
J. Ripken
  • Function : Author
L. Rob
  • Function : Author
G. Rowell
V. Sahakian
  • Function : Author
S. Schlenker
  • Function : Author
C. Schuster
  • Function : Author
U. Schwanke
M. Siewert
  • Function : Author
R. Steenkamp
  • Function : Author
C. Stegmann
  • Function : Author
D.J. van Der Walt
  • Function : Author
B. Visser
  • Function : Author
H.J. Volk
  • Function : Author
S.J. Wagner
  • Function : Author

Abstract

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 H.E.S.S. 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) \times 10^{-7} m^{-2} s^{-1}. The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.

Dates and versions

in2p3-00022258 , version 1 (13-12-2006)

Identifiers

Cite

F. Aharonian, A.G. Akhperjanian, K.-M. Aye, A.R. Bazer-Bachi, M. Beilicke, et al.. Very high-energy gamma rays from the direction of Sagittarius A. Astronomy and Astrophysics - A&A, 2004, 425, pp.L13-L17. ⟨10.1051/0004-6361:200400055⟩. ⟨in2p3-00022258⟩
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