Very high energy gamma rays from the direction of Sagittarius A

F. Aharonian; A. G. Akhperjanian; K. M. Aye; A. R. Bazer-Bachi; M. Beilicke; W. Benbow; D. Berge; P. Berghaus; K. Bernlöhr; O. Bolz; C. Boisson; C. Borgmeier; F. Breitling; A. M. Brown; J. Bussons Gordo; P. M. Chadwick; V. R. Chitnis; L. M. Chounet; R. Cornils; L. Costamante; B. Degrange; A. Djannati-Ataï; L. O.C. Drury; T. Ergin; P. Espigat; F. Feinstein; P. Fleury; G. Fontaine; S. Funk; Y. Gallant; B. Giebels; S. Gillessen; P. Goret; J. Guy; C. Hadjichristidis; M. Hauser; G. Heinzelmann; G. Henri; G. Hermann; J. A. Hinton; W. Hofmann; M. Holleran; D. Horns; O. C. de Jager; I. Jung; B. Khélifi; N. Komin; A. Konopelko; I. J. Latham; R. le Gallou; M. Lemoine; A. Lemière; N. Leroy; T. Lohse; A. Marcowith; C. Masterson; T. J.L. McComb; M. de Naurois; S. J. Nolan; A. Noutsos; K. J. Orford; J. L. Osborne; M. Ouchrif; M. Panter; G. Pelletier; S. Pita; M. Pohl; G. Pühlhofer; M. Punch; B. C. Raubenheimer; M. Raue; J. Raux; S. M. Rayner; I. Redondo; A. Reimer; O. Reimer; J. Ripken; M. Rivoal; L. Rob; L. Rolland; G. Rowell; V. Sahakian; L. Saugé; S. Schlenker; R. Schlickeiser; C. Schuster; U. Schwanke; M. Siewert; H. Sol; R. Steenkamp; C. Stegmann; J. P. Tavernet; C. G. Théoret; M. Tluczykont; D. J. van der Walt; G. Vasileiadis; P. Vincent; B. Visser; H. J. Völk; S. J. Wagner

doi:10.1051/0004-6361:200400055

Very high energy gamma rays from the direction of Sagittarius A

F. Aharonian
, A. G. Akhperjanian
, K. M. Aye
, A. R. Bazer-Bachi
, M. Beilicke
, W. Benbow
, D. Berge
, P. Berghaus
, K. Bernlöhr
, O. Bolz
, C. Boisson
, C. Borgmeier
, F. Breitling
, A. M. Brown
, J. Bussons Gordo
, P. M. Chadwick
, V. R. Chitnis
, L. M. Chounet
, R. Cornils
, L. Costamante

B. Degrange, A. Djannati-Ataï, L. O.C. Drury, T. Ergin, P. Espigat, F. Feinstein, P. Fleury, G. Fontaine, S. Funk, Y. Gallant, B. Giebels, S. Gillessen, P. Goret, J. Guy, C. Hadjichristidis, M. Hauser, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, W. Hofmann, M. Holleran, D. Horns, O. C. de Jager, I. Jung, B. Khélifi, N. Komin, A. Konopelko, I. J. Latham, R. le Gallou, M. Lemoine, A. Lemière, N. Leroy, T. Lohse, A. Marcowith, C. Masterson, T. J.L. McComb, M. de Naurois, S. J. Nolan, A. Noutsos, K. J. Orford, J. L. Osborne, M. Ouchrif, M. Panter, G. Pelletier, S. Pita, M. Pohl, G. Pühlhofer, M. Punch, B. C. Raubenheimer, M. Raue, J. Raux, S. M. Rayner, I. Redondo, A. Reimer, O. Reimer, J. Ripken, M. Rivoal, L. Rob, L. Rolland, G. Rowell, V. Sahakian, L. Saugé, S. Schlenker, R. Schlickeiser, C. Schuster, U. Schwanke, M. Siewert, H. Sol, R. Steenkamp, C. Stegmann, J. P. Tavernet, C. G. Théoret, M. Tluczykont, D. J. van der Walt, G. Vasileiadis, P. Vincent, B. Visser, H. J. Völk, S. J. Wagner

Max-Planck-Institut für Kernphysik
Yerevan Physics Institute
Department of Physics
Durham University
Centre national de la recherche scientifique
Institut für Experimentalphysik
Universität Hamburg
Physique Corpusculaire et Cosmologie
Collège de France
Institut für Physik
Humboldt-Universität zu Berlin
Sorbonne Univ.
Université Paris-Sud
Universités Paris VI and VII
European Associated Laboratory for Gamma-Ray Astronomy
Tata Institute of Fundamental Research, Mumbai
Ip Paris
Dublin Institute for Advanced Studies
Université Paris-Diderot
Landessternwarte Heidelberg
Unit for Space Physics
North-West University
Department of Physics
Institut für Theoretische Physik
Ruhr-University Bochum
Department of Physics and Astronomy
Iowa State University
Department of Physics and Astronomy
The University of Sheffield
Charles University
University of Namibia
Washington University in St. Louis

Research output: Contribution to journal › Article › peer-review

411 Citations (Scopus)

Abstract

We report the detection of a point-like source of very high energy (VHE) γ-rays coincident within 1′ of Sgr A*, obtained with the HESS array of Cherenkov telescopes. The γ-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) × 10^-7 m^-2 s^-1. The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.

Original language	English
Pages (from-to)	L13-L17
Journal	Astronomy and Astrophysics
Volume	425
Issue number	1
DOIs	https://doi.org/10.1051/0004-6361:200400055
Publication status	Published - 1 Oct 2004
Externally published	Yes

Keywords

Galaxy: centre
Gamma-rays: observations

Access to Document

10.1051/0004-6361:200400055

Cite this

Aharonian, F., Akhperjanian, A. G., Aye, K. M., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., Berghaus, P., Bernlöhr, K., Bolz, O., Boisson, C., Borgmeier, C., Breitling, F., Brown, A. M., Bussons Gordo, J., Chadwick, P. M., Chitnis, V. R., Chounet, L. M., Cornils, R., ... Wagner, S. J. (2004). Very high energy gamma rays from the direction of Sagittarius A. Astronomy and Astrophysics, 425(1), L13-L17. https://doi.org/10.1051/0004-6361:200400055

@article{ac3bf3ec1eef4ff8b8e574d503febe19,

title = "Very high energy gamma rays from the direction of Sagittarius A",

abstract = "We report the detection of a point-like source of very high energy (VHE) γ-rays coincident within 1′ of Sgr A*, obtained with the HESS array of Cherenkov telescopes. The γ-rays exhibit a power-law energy spectrum with a spectral index of -2.2 ± 0.09 {\texttimes} 0.15 and a flux above the 165 GeV threshold of (1.82 ± 0.22) {\texttimes} 10-7 m-2 s-1. The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.",

keywords = "Galaxy: centre, Gamma-rays: observations",

author = "F. Aharonian and Akhperjanian, \{A. G.\} and Aye, \{K. M.\} and Bazer-Bachi, \{A. R.\} and M. Beilicke and W. Benbow and D. Berge and P. Berghaus and K. Bernl{\"o}hr and O. Bolz and C. Boisson and C. Borgmeier and F. Breitling and Brown, \{A. M.\} and \{Bussons Gordo\}, J. and Chadwick, \{P. M.\} and Chitnis, \{V. R.\} and Chounet, \{L. M.\} and R. Cornils and L. Costamante and B. Degrange and A. Djannati-Ata{\"i} and Drury, \{L. O.C.\} and T. Ergin and P. Espigat and F. Feinstein and P. Fleury and G. Fontaine and S. Funk and Y. Gallant and B. Giebels and S. Gillessen and P. Goret and J. Guy and C. Hadjichristidis and M. Hauser and G. Heinzelmann and G. Henri and G. Hermann and Hinton, \{J. A.\} and W. Hofmann and M. Holleran and D. Horns and \{de Jager\}, \{O. C.\} and I. Jung and B. Kh{\'e}lifi and N. Komin and A. Konopelko and Latham, \{I. J.\} and \{le Gallou\}, R. and M. Lemoine and A. Lemi{\`e}re and N. Leroy and T. Lohse and A. Marcowith and C. Masterson and McComb, \{T. J.L.\} and \{de Naurois\}, M. and Nolan, \{S. J.\} and A. Noutsos and Orford, \{K. J.\} and Osborne, \{J. L.\} and M. Ouchrif and M. Panter and G. Pelletier and S. Pita and M. Pohl and G. P{\"u}hlhofer and M. Punch and Raubenheimer, \{B. C.\} and M. Raue and J. Raux and Rayner, \{S. M.\} and I. Redondo and A. Reimer and O. Reimer and J. Ripken and M. Rivoal and L. Rob and L. Rolland and G. Rowell and V. Sahakian and L. Saug{\'e} and S. Schlenker and R. Schlickeiser and C. Schuster and U. Schwanke and M. Siewert and H. Sol and R. Steenkamp and C. Stegmann and Tavernet, \{J. P.\} and Th{\'e}oret, \{C. G.\} and M. Tluczykont and \{van der Walt\}, \{D. J.\} and G. Vasileiadis and P. Vincent and B. Visser and V{\"o}lk, \{H. J.\} and Wagner, \{S. J.\}",

year = "2004",

month = oct,

day = "1",

doi = "10.1051/0004-6361:200400055",

language = "English",

volume = "425",

pages = "L13--L17",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "1",

}

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, Bussons Gordo, J, Chadwick, PM, Chitnis, VR, Chounet, LM, Cornils, R, Costamante, L, Degrange, B, Djannati-Ataï, A, Drury, LOC, 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, Lemoine, M, Lemière, A, Leroy, N, Lohse, T, Marcowith, A, Masterson, C, McComb, TJL, de Naurois, M, Nolan, SJ, Noutsos, A, Orford, KJ, Osborne, JL, Ouchrif, M, Panter, M, Pelletier, G, Pita, S, Pohl, M, Pühlhofer, G, Punch, M, Raubenheimer, BC, Raue, M, Raux, J, Rayner, SM, Redondo, I, Reimer, A, Reimer, O, Ripken, J, Rivoal, M, Rob, L, Rolland, L, Rowell, G, Sahakian, V, Saugé, L, Schlenker, S, Schlickeiser, R, Schuster, C, Schwanke, U, Siewert, M, Sol, H, Steenkamp, R, Stegmann, C, Tavernet, JP, Théoret, CG, Tluczykont, M, van der Walt, DJ, Vasileiadis, G, Vincent, P, Visser, B, Völk, HJ & Wagner, SJ 2004, 'Very high energy gamma rays from the direction of Sagittarius A', Astronomy and Astrophysics, vol. 425, no. 1, pp. L13-L17. https://doi.org/10.1051/0004-6361:200400055

TY - JOUR

T1 - Very high energy gamma rays from the direction of Sagittarius A

AU - Aharonian, F.

AU - Akhperjanian, A. G.

AU - Aye, K. M.

AU - Bazer-Bachi, A. R.

AU - Beilicke, M.

AU - Benbow, W.

AU - Berge, D.

AU - Berghaus, P.

AU - Bernlöhr, K.

AU - Bolz, O.

AU - Boisson, C.

AU - Borgmeier, C.

AU - Breitling, F.

AU - Brown, A. M.

AU - Bussons Gordo, J.

AU - Chadwick, P. M.

AU - Chitnis, V. R.

AU - Chounet, L. M.

AU - Cornils, R.

AU - Costamante, L.

AU - Degrange, B.

AU - Djannati-Ataï, A.

AU - Drury, L. O.C.

AU - Ergin, T.

AU - Espigat, P.

AU - Feinstein, F.

AU - Fleury, P.

AU - Fontaine, G.

AU - Funk, S.

AU - Gallant, Y.

AU - Giebels, B.

AU - Gillessen, S.

AU - Goret, P.

AU - Guy, J.

AU - Hadjichristidis, C.

AU - Hauser, M.

AU - Heinzelmann, G.

AU - Henri, G.

AU - Hermann, G.

AU - Hinton, J. A.

AU - Hofmann, W.

AU - Holleran, M.

AU - Horns, D.

AU - de Jager, O. C.

AU - Jung, I.

AU - Khélifi, B.

AU - Komin, N.

AU - Konopelko, A.

AU - Latham, I. J.

AU - le Gallou, R.

AU - Lemoine, M.

AU - Lemière, A.

AU - Leroy, N.

AU - Lohse, T.

AU - Marcowith, A.

AU - Masterson, C.

AU - McComb, T. J.L.

AU - de Naurois, M.

AU - Nolan, S. J.

AU - Noutsos, A.

AU - Orford, K. J.

AU - Osborne, J. L.

AU - Ouchrif, M.

AU - Panter, M.

AU - Pelletier, G.

AU - Pita, S.

AU - Pohl, M.

AU - Pühlhofer, G.

AU - Punch, M.

AU - Raubenheimer, B. C.

AU - Raue, M.

AU - Raux, J.

AU - Rayner, S. M.

AU - Redondo, I.

AU - Reimer, A.

AU - Reimer, O.

AU - Ripken, J.

AU - Rivoal, M.

AU - Rob, L.

AU - Rolland, L.

AU - Rowell, G.

AU - Sahakian, V.

AU - Saugé, L.

AU - Schlenker, S.

AU - Schlickeiser, R.

AU - Schuster, C.

AU - Schwanke, U.

AU - Siewert, M.

AU - Sol, H.

AU - Steenkamp, R.

AU - Stegmann, C.

AU - Tavernet, J. P.

AU - Théoret, C. G.

AU - Tluczykont, M.

AU - van der Walt, D. J.

AU - Vasileiadis, G.

AU - Vincent, P.

AU - Visser, B.

AU - Völk, H. J.

AU - Wagner, S. J.

PY - 2004/10/1

Y1 - 2004/10/1

N2 - We report the detection of a point-like source of very high energy (VHE) γ-rays coincident within 1′ of Sgr A*, obtained with the HESS array of Cherenkov telescopes. The γ-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) × 10-7 m-2 s-1. The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.

AB - We report the detection of a point-like source of very high energy (VHE) γ-rays coincident within 1′ of Sgr A*, obtained with the HESS array of Cherenkov telescopes. The γ-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) × 10-7 m-2 s-1. The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.

KW - Galaxy: centre

KW - Gamma-rays: observations

U2 - 10.1051/0004-6361:200400055

DO - 10.1051/0004-6361:200400055

M3 - Article

AN - SCOPUS:4744339300

SN - 0004-6361

VL - 425

SP - L13-L17

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

ER -

Very high energy gamma rays from the direction of Sagittarius A

Abstract

Keywords

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