Observations of Selected AGN with H.E.S.S

Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.; Beilicke, M.; Benbow, W.; Berge, D.; Borrel, V.; Bernlöhr, K.; Bolz, O.; Boisson, C:; Glicenstein, J.F.; Breitling, F.; Brown, A. M.; Dickinson, H.J.; Chadwick, P. M.; Braun, I.; Chounet, L.-M.; Cornils, R.; Costamante, L.; Degrange, B.; Djannati-Atai, A.; Drury, L.O'C.; Emmanoulopoulos, D.; Espigat, P.; Feinstein, F.; Jacholkowska, A.; Fontaine, G.; Funk, S.; Gallant, Y. A.; Giebels, B.; Gillessen, S.; Goret, P.; Dubus, G.; Hadjichristidis, C.; Hauser, M.; Heinzelmann, G.; Henri, G.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Holleran, M.; Horns, D.; de Jager, O. C.; Khélifi, B.; Komin, N.; Konopelko, A.; Latham, I. J.; Le Gallou, R.; Lemoine-Goumard, M.; Lemière, A.; Leroy, N.; Lohse, T.; Marcowith, A.; Masterson, C.; McComb, T. J. L.; de Naurois, M.; Nolan, S. J.; Noutsos, A.; Orford, K. J.; Osborne, J. L.; Ouchrif, M.; Panter, M.; Pelletier, G.; Pita, S.; Fuchs, Y.; Pühlhofer, G.; Punch, M.; Raubenheimer, B. C.; Raue, M.; Raux, J.; Rayner, S. M.; Martin, J.M.; Reimer, A.; Reimer, O.; Ripken, J.; Terrier, R.; 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, J.-P-; Théoret, C. G.; Tluczykont, M.; Venter, C.; Vasileiadis, G.; Vincent, P.; Völk, H. J.; Wagner, S. J.; Martineau-Huynh, O.; Spangler, D.

doi:10.1051/0004-6361:20053478

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Observations of Selected AGN with H.E.S.S

Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., et al. (2005). Observations of Selected AGN with H.E.S.S. Astrophysics & Astronomy, 441(2), 465-472. doi:10.1051/0004-6361:20053478.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-8646-1 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0019-0C89-0

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http://dx.doi.org/10.1051/0004-6361:20053478 (Publisher version) Open Access status unknown

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Creators:
Aharonian, F.¹, Author
Akhperjanian, A. G.¹, Author
Bazer-Bachi, A. R.², Author
Beilicke, M.¹, Author
Benbow, W.¹, Author
Berge, D.¹, Author
Borrel, V.², Author
Bernlöhr, K.¹, Author
Bolz, O.¹, Author
Boisson, C:², Author
Glicenstein, J.F.¹, Author
Breitling, F.², Author
Brown, A. M.², Author
Dickinson, H.J.², Author
Chadwick, P. M.², Author
Braun, I.¹, Author
Chounet, L.-M.², Author
Cornils, R.¹, Author
Costamante, L.¹, Author
Degrange, B.², Author
Djannati-Atai, A.¹, Author         Drury, L.O'C.², AuthorEmmanoulopoulos, D.², AuthorEspigat, P.², AuthorFeinstein, F.¹, Author         Jacholkowska, A.², AuthorFontaine, G.², AuthorFunk, S.¹, Author         Gallant, Y. A.¹, Author         Giebels, B.², AuthorGillessen, S.¹, Author         Goret, P.², AuthorDubus, G.¹, Author         Hadjichristidis, C.², AuthorHauser, M.², AuthorHeinzelmann, G.², AuthorHenri, G.², AuthorHermann, G.¹, Author         Hinton, J. A.¹, Author         Hofmann, W.¹, Author         Holleran, M.², AuthorHorns, D.¹, Author         de Jager, O. C.², AuthorKhélifi, B.¹, Author         Komin, N.², AuthorKonopelko, A.³, Author         Latham, I. J.², AuthorLe Gallou, R.², AuthorLemoine-Goumard, M.², AuthorLemière, A.², AuthorLeroy, N.², AuthorLohse, T.², AuthorMarcowith, A.², AuthorMasterson, C.¹, Author         McComb, T. J. L.², Authorde Naurois, M.¹, Author         Nolan, S. J.², AuthorNoutsos, A.², AuthorOrford, K. J.¹, Author         Osborne, J. L.¹, Author         Ouchrif, M.², AuthorPanter, M.¹, Author         Pelletier, G.², AuthorPita, S.², AuthorFuchs, Y.², AuthorPühlhofer, G.¹, Author         Punch, M.², AuthorRaubenheimer, B. C.², AuthorRaue, M.¹, Author         Raux, J.², AuthorRayner, S. M.², AuthorMartin, J.M.², AuthorReimer, A.², AuthorReimer, O.², AuthorRipken, J.², AuthorTerrier, R.², AuthorRob, L.², AuthorRolland, L.², AuthorRowell, G.¹, Author         Sahakian, V.², AuthorSaugé, L.¹, Author         Schlenker, S.², AuthorSchlickeiser, R.², AuthorSchuster, C.², AuthorSchwanke, U.², AuthorSiewert, M.², AuthorSol, H.², AuthorSteenkamp, R.², AuthorStegmann, C.², AuthorTavernet, J.-P-², AuthorThéoret, C. G.², AuthorTluczykont, M.², AuthorVenter, C.², AuthorVasileiadis, G.¹, Author         Vincent, P.², AuthorVölk, H. J.³, Author         Wagner, S. J.², AuthorMartineau-Huynh, O.², AuthorSpangler, D.², Author more..

Affiliations:
1Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550
2Yerevan Physics Institute, ArmeniaUniversity of Durham, Department of Physics, UKCentre d'Etudes Spatiales des Rayonnements, CNRS/UPS Toulouse, FranceUniversität Hamburg, Institut für Experimentalphysik, GermanyInstitut für Physik, Humboldt-Universität zu Berlin, GermanyLUTH, UMR 8102 du CNRS, Observatoire de Paris, Section de Meudon, FranceGroupe d'astroparticules de Montpellier, IN2P3/CNRS, Université Montpellier II, FranceLaboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Universités Paris VI & VII, Jussieu, FranceEuropean Associated Laboratory for Gamma-Ray Astronomy, jointly supported by CNRS and MPGLaboratoire Leprince-Ringuet, IN2P3/CNRS, Ecole Polytechnique, Palaiseau, FranceDublin Institute for Advanced Studies, IrelandService d'Astrophysique. DAPNIA/DSM/CEA, CE Saclay, Gif-sur-Yvette, FranceLandessternwarte, Königstuhl, Heidelberg, GermanyLaboratoire d'Astrophysique de Grenoble, INSU/CNRS, Université Joseph Fourier, FranceUnit for Space Physics, North-West University, Potchefstroom, South AfricaInstitut für theoretische Physik, Lehrstuhl IV, Ruhr-Universität Bochum, GermanyInstitute of Particle and Nuclear Physics, Charles University, Prague, Czech RepublicUniversity of Namibia, Windhoek, NamibiaAPC, Paris, FranceDAPNIA/DSM/CEA, CE Saclay, Gif-sur-Yvette, France, ou_persistent22
3Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society, ou_907548

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Free keywords: Galaxies : active - BL Lacertae objects. individual - Gamma rays: observations H.E.S.S.

MPINP: HESS - Abteilung Hofmann

Abstract: A sample of selected active galactic nuclei (AGN) was observed in 2003 and 2004 with the High Energy Stereoscopic System (H.E.S.S.), an array of imaging atmospheric-Cherenkov telescopes in Namibia. The redshifts of these candidate very-high-energy (VHE, >100 GeV) gamma-ray emitters range from z=0.00183 to z=0.333. Significant detections were already reported for some of these objects, such as PKS 2155-304 and Markarian 421. Marginal evidence (3.1 sigma) for a signal is found from large-zenith-angle observations of Markarian 501, corresponding to an integral flux of I(>1.65 TeV) = (1.5 +/- 0.6 (stat) +/- 0.3 (syst)) x 10^{-12} cm^{-2} s^{-1} or ~15% of the Crab Nebula flux. Integral flux upper limits for 19 other AGN, based on exposures of ~1 to ~8 hrs live time, and with average energy thresholds between 160 GeV and 610 GeV, range from 0.4% to 5.1% of the Crab Nebula flux. All the upper limits are the most constraining ever reported for these objects.

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Language(s): eng - English

Dates: Published Online: 2005-10

Publication Status: Published online

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Identifiers: DOI: 10.1051/0004-6361:20053478

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Title: Astrophysics & Astronomy

Other : Astrophys. Astron.

Source Genre: Journal

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Publ. Info: Berlin : Springer-Verlag

Pages: - Volume / Issue: 441 (2) Sequence Number: - Start / End Page: 465 - 472 Identifier: ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219