Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes

F. Aharonian; A. G. Akhperjanian; A. R. Bazer-Bachi; M. Beilicke; W. Benbow; D. Berge; K. Bernlöhr; C. Boisson; O. Bolz; V. Borrel; I. Braun; F. Breitling; A. M. Brown; R. Bühler; I. Büsching; S. Carrigan; P. M. Chadwick; L. M. Chounet; R. Cornils; L. Costamante; B. Degrange; H. J. Dickinson; A. Djannati-Ataï; L. O.C. Drury; G. Dubus; K. Egberts; D. Emmanoulopoulos; P. Espigat; F. Feinstein; E. Ferrero; G. Fontaine; S. Funk; S. Funk; Y. A. Gallant; B. Giebels; J. F. Glicenstein; P. Goret; C. Hadjichristidis; D. Hauser; M. Hauser; G. Heinzelmann; G. Henri; G. Hermann; J. A. Hinton; W. Hofmann; M. Holleran; D. Horns; A. Jacholkowska; O. C. de Jager; B. Khélifi; N. Komin; A. Konopelko; I. J. Latham; R. le Gallou; A. Lemière; M. Lemoine-Goumard; T. Lohse; J. M. Martin; O. Martineau-Huynh; A. Marcowith; C. Masterson; T. J.L. McComb; M. de Naurois; D. Nedbal; S. J. Nolan; A. Noutsos; K. J. Orford; J. L. Osborne; M. Ouchrif; M. Panter; G. Pelletier; S. Pita; G. Pühlhofer; M. Punch; B. C. Raubenheimer; M. Raue; S. M. Rayner; A. Reimer; O. Reimer; J. Ripken; L. Rob; L. Rolland; G. Rowell; V. Sahakian; L. Saugé; S. Schlenker; R. Schlickeiser; U. Schwanke; H. Sol; D. Spangler; F. Spanier; R. Steenkamp; C. Stegmann; G. Superina; J. P. Tavernet; R. Terrier; C. G. Théoret; M. Tluczykont; C. van Eldik; G. Vasileiadis; C. Venter; P. Vincent; H. J. Völk; S. J. Wagner; M. Ward

doi:10.1051/0004-6361:20054732

Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes

F. Aharonian
, A. G. Akhperjanian
, A. R. Bazer-Bachi
, M. Beilicke
, W. Benbow
, D. Berge
, K. Bernlöhr
, C. Boisson
, O. Bolz
, V. Borrel
, I. Braun
, F. Breitling
, A. M. Brown
, R. Bühler
, I. Büsching
, S. Carrigan
, P. M. Chadwick
, L. M. Chounet
, R. Cornils
, L. Costamante

B. Degrange, H. J. Dickinson, A. Djannati-Ataï, L. O.C. Drury, G. Dubus, K. Egberts, D. Emmanoulopoulos, P. Espigat, F. Feinstein, E. Ferrero, G. Fontaine, S. Funk, S. Funk, Y. A. Gallant, B. Giebels, J. F. Glicenstein, P. Goret, C. Hadjichristidis, D. Hauser, M. Hauser, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, W. Hofmann, M. Holleran, D. Horns, A. Jacholkowska, O. C. de Jager, B. Khélifi, N. Komin, A. Konopelko, I. J. Latham, R. le Gallou, A. Lemière, M. Lemoine-Goumard, T. Lohse, J. M. Martin, O. Martineau-Huynh, A. Marcowith, C. Masterson, T. J.L. McComb, M. de Naurois, D. Nedbal, S. J. Nolan, A. Noutsos, K. J. Orford, J. L. Osborne, M. Ouchrif, M. Panter, G. Pelletier, S. Pita, G. Pühlhofer, M. Punch, B. C. Raubenheimer, M. Raue, S. M. Rayner, A. Reimer, O. Reimer, J. Ripken, L. Rob, L. Rolland, G. Rowell, V. Sahakian, L. Saugé, S. Schlenker, R. Schlickeiser, U. Schwanke, H. Sol, D. Spangler, F. Spanier, R. Steenkamp, C. Stegmann, G. Superina, J. P. Tavernet, R. Terrier, C. G. Théoret, M. Tluczykont, C. van Eldik, G. Vasileiadis, C. Venter, P. Vincent, H. J. Völk, S. J. Wagner, M. Ward

Max-Planck-Institut für Kernphysik
Yerevan Physics Institute
CNRS
Universität Hamburg
Humboldt-Universität zu Berlin
Sorbonne Univ.
Durham University
North-West University
European Associated Laboratory for Gamma-Ray Astronomy
Astroparticule and Cosmol APC
Dublin Institute for Advanced Studies
Landessternwarte Heidelberg
Laboratoire Univers et Particules de Montpellier
Institut Pierre Simon Laplace, CNRS and CEA
University of Tübingen
Universités Paris VI and VII
Charles University
Ruhr-University Bochum
University of Namibia
c/o DESY

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The extreme synchrotron BL Lac object H 2356-309, located at a redshift of z = 0.165, was observed from June to December 2004 with a total exposure of ≈40 h live-time with the HESS (High Energy Stereoscopic System) array of atmospheric-Cherenkov telescopes (ACTs). Analysis of this data set yields, for the first time, a strong excess of 453 γ-rays (10 standard deviations above background) from H 2356-309, corresponding to an observed integral flux above 200 GeV of I(>200 GeV) = (4.1 ±0.5) × 10 ^-12 cm ^-2 s ^-1 (statistical error only). The differential energy spectrum of the source between 200 GeV and 1.3TeV is well-described by a power law with a normalisation (at 1 TeV) of N ₀ = (3.00 ±0.80 _stat ± 0.31 _sys)× 10 ^-13 cm ^-2 s ^-1TeV ^-1 and a photon index of Γ = 3.09 ± 0.24 _stat ± 0.10 _sys. H 2356-309 is one of the most distant BL Lac objects detected at very-high-energy γ-rays so far. Results from simultaneous observations from ROTSE-III (optical), RXTE (X-rays) and NRT (radio) are also included and used together with the HESS data to constrain a single-zone homogeneous synchrotron self-Compton (SSC) model. This model provides an adequate fit to the HESS data when using a reasonable set of model parameters.

langue originale	Anglais
Pages (de - à)	461-466
Nombre de pages	6
journal	Astronomy and Astrophysics
Volume	455
Numéro de publication	2
Les DOIs	https://doi.org/10.1051/0004-6361:20054732
état	Publié - 1 août 2006
Modification externe	Oui

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10.1051/0004-6361:20054732

Contient cette citation

Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., Bernlöhr, K., Boisson, C., Bolz, O., Borrel, V., Braun, I., Breitling, F., Brown, A. M., Bühler, R., Büsching, I., Carrigan, S., Chadwick, P. M., Chounet, L. M., Cornils, R., ... Ward, M. (2006). Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes. Astronomy and Astrophysics, 455(2), 461-466. https://doi.org/10.1051/0004-6361:20054732

@article{1b282b84cb694f179d36fec14ff3ecae,

title = "Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes",

abstract = "The extreme synchrotron BL Lac object H 2356-309, located at a redshift of z = 0.165, was observed from June to December 2004 with a total exposure of ≈40 h live-time with the HESS (High Energy Stereoscopic System) array of atmospheric-Cherenkov telescopes (ACTs). Analysis of this data set yields, for the first time, a strong excess of 453 γ-rays (10 standard deviations above background) from H 2356-309, corresponding to an observed integral flux above 200 GeV of I(>200 GeV) = (4.1 ±0.5) × 10 -12 cm -2 s -1 (statistical error only). The differential energy spectrum of the source between 200 GeV and 1.3TeV is well-described by a power law with a normalisation (at 1 TeV) of N 0 = (3.00 ±0.80 stat ± 0.31 sys)× 10 -13 cm -2 s -1TeV -1 and a photon index of Γ = 3.09 ± 0.24 stat ± 0.10 sys. H 2356-309 is one of the most distant BL Lac objects detected at very-high-energy γ-rays so far. Results from simultaneous observations from ROTSE-III (optical), RXTE (X-rays) and NRT (radio) are also included and used together with the HESS data to constrain a single-zone homogeneous synchrotron self-Compton (SSC) model. This model provides an adequate fit to the HESS data when using a reasonable set of model parameters.",

keywords = "Galaxies: BL Lacertae objects: individual: H 2356-309, Galaxies: active, Gamma rays; observations",

author = "F. Aharonian and Akhperjanian, \{A. G.\} and Bazer-Bachi, \{A. R.\} and M. Beilicke and W. Benbow and D. Berge and K. Bernl{\"o}hr and C. Boisson and O. Bolz and V. Borrel and I. Braun and F. Breitling and Brown, \{A. M.\} and R. B{\"u}hler and I. B{\"u}sching and S. Carrigan and Chadwick, \{P. M.\} and Chounet, \{L. M.\} and R. Cornils and L. Costamante and B. Degrange and Dickinson, \{H. J.\} and A. Djannati-Ata{\"i} and Drury, \{L. O.C.\} and G. Dubus and K. Egberts and D. Emmanoulopoulos and P. Espigat and F. Feinstein and E. Ferrero and G. Fontaine and S. Funk and S. Funk and Gallant, \{Y. A.\} and B. Giebels and Glicenstein, \{J. F.\} and P. Goret and C. Hadjichristidis and D. Hauser 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 A. Jacholkowska and \{de Jager\}, \{O. C.\} and B. Kh{\'e}lifi and N. Komin and A. Konopelko and Latham, \{I. J.\} and \{le Gallou\}, R. and A. Lemi{\`e}re and M. Lemoine-Goumard and T. Lohse and Martin, \{J. M.\} and O. Martineau-Huynh and A. Marcowith and C. Masterson and McComb, \{T. J.L.\} and \{de Naurois\}, M. and D. Nedbal 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 G. P{\"u}hlhofer and M. Punch and Raubenheimer, \{B. C.\} and M. Raue and Rayner, \{S. M.\} and A. Reimer and O. Reimer and J. Ripken and L. Rob and L. Rolland and G. Rowell and V. Sahakian and L. Saug{\'e} and S. Schlenker and R. Schlickeiser and U. Schwanke and H. Sol and D. Spangler and F. Spanier and R. Steenkamp and C. Stegmann and G. Superina and Tavernet, \{J. P.\} and R. Terrier and Th{\'e}oret, \{C. G.\} and M. Tluczykont and \{van Eldik\}, C. and G. Vasileiadis and C. Venter and P. Vincent and V{\"o}lk, \{H. J.\} and Wagner, \{S. J.\} and M. Ward",

year = "2006",

month = aug,

day = "1",

doi = "10.1051/0004-6361:20054732",

language = "English",

volume = "455",

pages = "461--466",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

number = "2",

}

Aharonian, F, Akhperjanian, AG, Bazer-Bachi, AR, Beilicke, M, Benbow, W, Berge, D, Bernlöhr, K, Boisson, C, Bolz, O, Borrel, V, Braun, I, Breitling, F, Brown, AM, Bühler, R, Büsching, I, Carrigan, S, Chadwick, PM, Chounet, LM, Cornils, R, Costamante, L, Degrange, B, Dickinson, HJ, Djannati-Ataï, A, Drury, LOC, Dubus, G, Egberts, K, Emmanoulopoulos, D, Espigat, P, Feinstein, F, Ferrero, E, Fontaine, G, Funk, S, Funk, S, Gallant, YA, Giebels, B, Glicenstein, JF, Goret, P, Hadjichristidis, C, Hauser, D, Hauser, M, Heinzelmann, G, Henri, G, Hermann, G, Hinton, JA, Hofmann, W, Holleran, M, Horns, D, Jacholkowska, A, de Jager, OC, Khélifi, B, Komin, N, Konopelko, A, Latham, IJ, le Gallou, R, Lemière, A, Lemoine-Goumard, M, Lohse, T, Martin, JM, Martineau-Huynh, O, Marcowith, A, Masterson, C, McComb, TJL, de Naurois, M, Nedbal, D, Nolan, SJ, Noutsos, A, Orford, KJ, Osborne, JL, Ouchrif, M, Panter, M, Pelletier, G, Pita, S, Pühlhofer, G, Punch, M, Raubenheimer, BC, Raue, M, Rayner, SM, Reimer, A, Reimer, O, Ripken, J, Rob, L, Rolland, L, Rowell, G, Sahakian, V, Saugé, L, Schlenker, S, Schlickeiser, R, Schwanke, U, Sol, H, Spangler, D, Spanier, F, Steenkamp, R, Stegmann, C, Superina, G, Tavernet, JP, Terrier, R, Théoret, CG, Tluczykont, M, van Eldik, C, Vasileiadis, G, Venter, C, Vincent, P, Völk, HJ, Wagner, SJ & Ward, M 2006, 'Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes', Astronomy and Astrophysics, VOL. 455, Numéro 2, p. 461-466. https://doi.org/10.1051/0004-6361:20054732

TY - JOUR

T1 - Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes

AU - Aharonian, F.

AU - Akhperjanian, A. G.

AU - Bazer-Bachi, A. R.

AU - Beilicke, M.

AU - Benbow, W.

AU - Berge, D.

AU - Bernlöhr, K.

AU - Boisson, C.

AU - Bolz, O.

AU - Borrel, V.

AU - Braun, I.

AU - Breitling, F.

AU - Brown, A. M.

AU - Bühler, R.

AU - Büsching, I.

AU - Carrigan, S.

AU - Chadwick, P. M.

AU - Chounet, L. M.

AU - Cornils, R.

AU - Costamante, L.

AU - Degrange, B.

AU - Dickinson, H. J.

AU - Djannati-Ataï, A.

AU - Drury, L. O.C.

AU - Dubus, G.

AU - Egberts, K.

AU - Emmanoulopoulos, D.

AU - Espigat, P.

AU - Feinstein, F.

AU - Ferrero, E.

AU - Fontaine, G.

AU - Funk, S.

AU - Gallant, Y. A.

AU - Giebels, B.

AU - Glicenstein, J. F.

AU - Goret, P.

AU - Hadjichristidis, C.

AU - Hauser, D.

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 - Jacholkowska, A.

AU - de Jager, O. C.

AU - Khélifi, B.

AU - Komin, N.

AU - Konopelko, A.

AU - Latham, I. J.

AU - le Gallou, R.

AU - Lemière, A.

AU - Lemoine-Goumard, M.

AU - Lohse, T.

AU - Martin, J. M.

AU - Martineau-Huynh, O.

AU - Marcowith, A.

AU - Masterson, C.

AU - McComb, T. J.L.

AU - de Naurois, M.

AU - Nedbal, D.

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 - Pühlhofer, G.

AU - Punch, M.

AU - Raubenheimer, B. C.

AU - Raue, M.

AU - Rayner, S. M.

AU - Reimer, A.

AU - Reimer, O.

AU - Ripken, J.

AU - Rob, L.

AU - Rolland, L.

AU - Rowell, G.

AU - Sahakian, V.

AU - Saugé, L.

AU - Schlenker, S.

AU - Schlickeiser, R.

AU - Schwanke, U.

AU - Sol, H.

AU - Spangler, D.

AU - Spanier, F.

AU - Steenkamp, R.

AU - Stegmann, C.

AU - Superina, G.

AU - Tavernet, J. P.

AU - Terrier, R.

AU - Théoret, C. G.

AU - Tluczykont, M.

AU - van Eldik, C.

AU - Vasileiadis, G.

AU - Venter, C.

AU - Vincent, P.

AU - Völk, H. J.

AU - Wagner, S. J.

AU - Ward, M.

PY - 2006/8/1

Y1 - 2006/8/1

N2 - The extreme synchrotron BL Lac object H 2356-309, located at a redshift of z = 0.165, was observed from June to December 2004 with a total exposure of ≈40 h live-time with the HESS (High Energy Stereoscopic System) array of atmospheric-Cherenkov telescopes (ACTs). Analysis of this data set yields, for the first time, a strong excess of 453 γ-rays (10 standard deviations above background) from H 2356-309, corresponding to an observed integral flux above 200 GeV of I(>200 GeV) = (4.1 ±0.5) × 10 -12 cm -2 s -1 (statistical error only). The differential energy spectrum of the source between 200 GeV and 1.3TeV is well-described by a power law with a normalisation (at 1 TeV) of N 0 = (3.00 ±0.80 stat ± 0.31 sys)× 10 -13 cm -2 s -1TeV -1 and a photon index of Γ = 3.09 ± 0.24 stat ± 0.10 sys. H 2356-309 is one of the most distant BL Lac objects detected at very-high-energy γ-rays so far. Results from simultaneous observations from ROTSE-III (optical), RXTE (X-rays) and NRT (radio) are also included and used together with the HESS data to constrain a single-zone homogeneous synchrotron self-Compton (SSC) model. This model provides an adequate fit to the HESS data when using a reasonable set of model parameters.

AB - The extreme synchrotron BL Lac object H 2356-309, located at a redshift of z = 0.165, was observed from June to December 2004 with a total exposure of ≈40 h live-time with the HESS (High Energy Stereoscopic System) array of atmospheric-Cherenkov telescopes (ACTs). Analysis of this data set yields, for the first time, a strong excess of 453 γ-rays (10 standard deviations above background) from H 2356-309, corresponding to an observed integral flux above 200 GeV of I(>200 GeV) = (4.1 ±0.5) × 10 -12 cm -2 s -1 (statistical error only). The differential energy spectrum of the source between 200 GeV and 1.3TeV is well-described by a power law with a normalisation (at 1 TeV) of N 0 = (3.00 ±0.80 stat ± 0.31 sys)× 10 -13 cm -2 s -1TeV -1 and a photon index of Γ = 3.09 ± 0.24 stat ± 0.10 sys. H 2356-309 is one of the most distant BL Lac objects detected at very-high-energy γ-rays so far. Results from simultaneous observations from ROTSE-III (optical), RXTE (X-rays) and NRT (radio) are also included and used together with the HESS data to constrain a single-zone homogeneous synchrotron self-Compton (SSC) model. This model provides an adequate fit to the HESS data when using a reasonable set of model parameters.

KW - Galaxies: BL Lacertae objects: individual: H 2356-309

KW - Galaxies: active

KW - Gamma rays; observations

U2 - 10.1051/0004-6361:20054732

DO - 10.1051/0004-6361:20054732

M3 - Article

AN - SCOPUS:33748426223

SN - 0004-6361

VL - 455

SP - 461

EP - 466

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 2

ER -

Discovery of very high energy γ-ray emission from the BL Lacertae object H 2356-309 with the HESS Cherenkov telescopes

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