Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011

A. Abramowski; F. Aharonian; F. Ait Benkhali; A. G. Akhperjanian; E. Angüner; G. Anton; S. Balenderan; Agnès Balzer; A. Barnacka; Y. Becherini; J. Becker Tjus; K. Bernlöhr; E. Birsin; E. Bissaldi; J. Biteau; M. Böttcher; C. Boisson; J. Bolmont; P. Bordas; J. Brucker; F. Brun; P. Brun; T. Bulik; S. Carrigan; S. Casanova; M. Cerruti; P. M. Chadwick; R. Chalme-Calvet; R. C. G. Chaves; A. Cheesebrough; M. Chrétien; S. Colafrancesco; G. Cologna; J. Conrad; C. Couturier; Y. Cui; M. Dalton; M. K. Daniel; I. D. Davids; B. Degrange; C. Deil; P. Dewilt; H. J. Dickinson; A. Djannati-Ataï; W. Domainko; L. O'C. Drury; G. Dubus; K. Dutson; J. Dyks; M. Dyrda; T. Edwards; K. Egberts; P. Eger; P. Espigat; C. Farnier; S. Fegan; F. Feinstein; M. V. Fernandes; D. Fernandez; A. Fiasson; G. Fontaine; A. Förster; M. Füssling; M. Gajdus; Y. A. Gallant; T. Garrigoux; G. Giavitto; B. Giebels; J. F. Glicenstein; M.-H. Grondin; M. Grudzińska; S. Häffner; J. Hahn; J. Harris; G. Heinzelmann; G. Henri; G. Hermann; O. Hervet; A. Hillert; J. A. Hinton; W. Hofmann; P. Hofverberg; M. Holler; D. Horns; A. Jacholkowska; C. Jahn; M. Jamrozy; M. Janiak; F. Jankowsky; I. Jung; M. A. Kastendieck; K. Katarzyński; U. Katz; S. Kaufmann; B. Khélifi; Michel Kieffer; S. Klepser; D. Klochkov; W. Kluźniak; T. Kneiske; D. Kolitzus; Nu. Komin; K. Kosack; S. Krakau; F. Krayzel; P. P. Krüger; H. Laffon; G. Lamanna; J. Lefaucheur; A. Lemière; M. Lemoine-Goumard; J.-P. Lenain; D. Lennarz; T. Lohse; A. Lopatin; C.-C. Lu; V. Marandon; Alexandre Marcowith; R. Marx; G. Maurin; N. Maxted; M. Mayer; T. J. L. Mccomb; J. Méhault; P. J. Meintjes; U. Menzler; M. Meyer; R. Moderski; M. Mohamed; Emmanuel Moulin; T. Murach; C. L. Naumann; M. de Naurois; J. Niemiec; S. J. Nolan; L. Oakes; S. Ohm; E. de Oña Wilhelmi; B. Opitz; M. Ostrowski; I. Oya; M. Panter; R. D. Parsons; M. Paz Arribas; N. W. Pekeur; G. Pelletier; J. Perez; P.-O. Petrucci; B. Peyaud; S. Pita; H. Poon; G. Pühlhofer; M. Punch; A. Quirrenbach; S. Raab; M. Raue; A. Reimer; O. Reimer; Matthieu Renaud; R. de Los Reyes; F. Rieger; L. Rob; C. Romoli; S. Rosier-Lees; G. Rowell; B. Rudak; C. B. Rulten; V. Sahakian; D. A. Sanchez; A. Santangelo; R. Schlickeiser; F. Schüssler; A. Schulz; U. Schwanke; S. Schwarzburg; S. Schwemmer; H. Sol; G. Spengler; F. Spies; Ł. Stawarz; R. Steenkamp; C. Stegmann; F. Stinzing; K. Stycz; I. Sushch; A. Szostek; J.-P. Tavernet; T. Tavernier; A. M. Taylor; R. Terrier; M. Tluczykont; C. Trichard; K. Valerius; C. van Eldik; B. van Soelen; George Vasileiadis; C. Venter; A. Viana; P. Vincent; H. J. Völk; F. Volpe; M. Vorster; T. Vuillaume; S. J. Wagner; P. Wagner; M. Ward; M. Weidinger; Q. Weitzel; R. White; A. Wierzcholska; P. Willmann; A. Wörnlein; D. Wouters; V. Zabalza; M. Zacharias; A. Zajczyk; A. A. Zdziarski; A. Zech; H.-S. Zechlin

doi:10.1051/0004-6361/201322897

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Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011

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Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011

A. Abramowski, F. Aharonian, F. Ait Benkhali, A. G. Akhperjanian, E. Angüner, G. Anton, S. Balenderan, Agnès Balzer, A. Barnacka, Y. Becherini, …

Astronomy & Astrophysics - A&A, Vol.564

04/2014

DOI: https://doi.org/10.1051/0004-6361/201322897

Abstract

Astrophysics

High Energy Astrophysical Phenomena

Galaxy Astrophysics

Cosmology and Extragalactic Astrophysics

About 40% of the observation time of the High Energy Stereoscopic System (H.E.S.S.) is dedicated to studying active galactic nuclei (AGN), with the aim of increasing the sample of known extragalactic very-high-energy (VHE, E>100 GeV) sources and constraining the physical processes at play in potential emitters. H.E.S.S. observations of AGN, spanning a period from April 2004 to December 2011, are investigated to constrain their gamma-ray fluxes. Only the 47 sources without significant excess detected at the position of the targets are presented. Upper limits on VHE fluxes of the targets were computed and a search for variability was performed on the nightly time scale. For 41 objects, the flux upper limits we derived are the most constraining reported to date. These constraints at VHE are compared with the flux level expected from extrapolations of Fermi-LAT measurements in the two-year catalog of AGN. The H.E.S.S. upper limits are at least a factor of two lower than the extrapolated Fermi-LAT fluxes for 11 objects. Taking into account the attenuation by the extragalactic background light reduces the tension for all but two of them, suggesting intrinsic curvature in the high-energy spectra of these two AGN. Compilation efforts led by current VHE instruments are of critical importance for target-selection strategies before the advent of the Cherenkov Telescope Array, CTA.

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Title: Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011
Creators - without role: A. Abramowski - Universität Hamburg
F. Aharonian - National Academy of Sciences of Armenia
F. Ait Benkhali
A. G. Akhperjanian - National Academy of Sciences of Armenia
E. Angüner - Humboldt-Universität zu Berlin
G. Anton - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Balenderan - Durham University
Agnès Balzer - University of Potsdam
A. Barnacka - Nicolaus Copernicus Astronomical Center
Y. Becherini - Linnaeus University
J. Becker Tjus
K. Bernlöhr - Humboldt-Universität zu Berlin
E. Birsin - Humboldt-Universität zu Berlin
E. Bissaldi - Universität Innsbruck
J. Biteau - University of California, Santa Cruz
M. Böttcher - North-West University
C. Boisson - Université Paris Cité
J. Bolmont - Laboratoire de Physique Nucléaire et de Hautes Énergies
P. Bordas - University of Tübingen
J. Brucker - Friedrich-Alexander-Universität Erlangen-Nürnberg
F. Brun - Max Planck Institute for Nuclear Physics
P. Brun - CEA Paris-Saclay
T. Bulik - University of Warsaw
S. Carrigan - Max Planck Institute for Nuclear Physics
S. Casanova - North-West University
M. Cerruti - Center for Astrophysics Harvard & Smithsonian
P. M. Chadwick - Durham University
R. Chalme-Calvet - Sorbonne Université
R. C. G. Chaves - Institut de Recherche sur les Lois Fondamentales de l'Univers
A. Cheesebrough - Durham University
M. Chrétien - Sorbonne Université
S. Colafrancesco - University of the Witwatersrand
G. Cologna - Heidelberg University
J. Conrad - Stockholm University
C. Couturier - Sorbonne Université
Y. Cui - University of Tübingen
M. Dalton - Laboratoire de Physique des deux infinis Bordeaux
M. K. Daniel - Durham University
I. D. Davids - University of Namibia
B. Degrange - École Polytechnique
C. Deil - Max Planck Institute for Nuclear Physics
P. Dewilt - University of Adelaide
H. J. Dickinson - Stockholm University
A. Djannati-Ataï - Université Paris Cité
W. Domainko - Max Planck Institute for Nuclear Physics
L. O'C. Drury
G. Dubus - Institut de Planétologie et d'Astrophysique de Grenoble
K. Dutson - University of Leicester
J. Dyks - Nicolaus Copernicus Astronomical Center
M. Dyrda - Institute of Nuclear Physics, Polish Academy of Sciences
T. Edwards - Max Planck Institute for Nuclear Physics
K. Egberts - Universität Innsbruck
P. Eger - Max Planck Institute for Nuclear Physics
P. Espigat - Université Paris Cité
C. Farnier - Stockholm University
S. Fegan - École Polytechnique
F. Feinstein - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
M. V. Fernandes - Universität Hamburg
D. Fernandez - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
A. Fiasson - Laboratoire d’Annecy de Physique des Particules
G. Fontaine - Laboratoire Leprince-Ringuet
A. Förster - Max Planck Institute for Nuclear Physics
M. Füssling
M. Gajdus - Humboldt-Universität zu Berlin
Y. A. Gallant - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
T. Garrigoux - Sorbonne Université
G. Giavitto
B. Giebels - Laboratoire Leprince-Ringuet
J. F. Glicenstein - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
M.-H. Grondin - Heidelberg University
M. Grudzińska - University of Warsaw
S. Häffner - Friedrich-Alexander-Universität Erlangen-Nürnberg
J. Hahn - Max Planck Institute for Nuclear Physics
J. Harris - Durham University
G. Heinzelmann - Universität Hamburg
G. Henri - Centre National de la Recherche Scientifique
G. Hermann - Max Planck Institute for Nuclear Physics
O. Hervet - Délégation Paris 7
A. Hillert - Max Planck Institute for Nuclear Physics
J. A. Hinton - University of Leicester
W. Hofmann - Max Planck Institute for Nuclear Physics
P. Hofverberg - Max Planck Institute for Nuclear Physics
M. Holler - University of Potsdam
D. Horns - Universität Hamburg
A. Jacholkowska - Laboratoire de Physique Nucléaire et de Hautes Énergies
C. Jahn - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Jamrozy - Jagiellonian University
M. Janiak - Nicolaus Copernicus Astronomical Center
F. Jankowsky - Heidelberg University
I. Jung - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. A. Kastendieck - Universität Hamburg
K. Katarzyński - Nicolaus Copernicus University
U. Katz - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Kaufmann - Heidelberg University
B. Khélifi - Délégation Paris 7
Michel Kieffer - Sorbonne Université
S. Klepser
D. Klochkov - University of Tübingen
W. Kluźniak - Nicolaus Copernicus Astronomical Center
T. Kneiske - Universität Hamburg
D. Kolitzus - Universität Innsbruck
Nu. Komin - Laboratoire d’Annecy de Physique des Particules
K. Kosack - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
S. Krakau - Ruhr University Bochum
F. Krayzel - Laboratoire d’Annecy de Physique des Particules
P. P. Krüger - Max Planck Institute for Nuclear Physics
H. Laffon - Laboratoire de Physique des deux infinis Bordeaux
G. Lamanna - Laboratoire d’Annecy de Physique des Particules
J. Lefaucheur - Délégation Paris 7
A. Lemière - Délégation Paris 7
M. Lemoine-Goumard - Institut National de Physique Nucléaire et de Physique des Particules
J.-P. Lenain - Sorbonne Université
D. Lennarz - Max Planck Institute for Nuclear Physics
T. Lohse - Humboldt-Universität zu Berlin
A. Lopatin - Friedrich-Alexander-Universität Erlangen-Nürnberg
C.-C. Lu - Max Planck Institute for Nuclear Physics
V. Marandon - Max Planck Institute for Nuclear Physics
Alexandre Marcowith - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
R. Marx - Max Planck Institute for Nuclear Physics
G. Maurin - Laboratoire d’Annecy de Physique des Particules
N. Maxted - University of Adelaide
M. Mayer - University of Potsdam
T. J. L. Mccomb - Durham University
J. Méhault - Institut National de Physique Nucléaire et de Physique des Particules
P. J. Meintjes - University of the Free State
U. Menzler - Ruhr University Bochum
M. Meyer - Stockholm University
R. Moderski - Nicolaus Copernicus Astronomical Center
M. Mohamed - Heidelberg University
Emmanuel Moulin - Institut de Recherche sur les Lois Fondamentales de l'Univers
T. Murach - Humboldt-Universität zu Berlin
C. L. Naumann - Sorbonne Université
M. de Naurois - École Polytechnique
J. Niemiec - Institute of Nuclear Physics, Polish Academy of Sciences
S. J. Nolan - Durham University
L. Oakes - Humboldt-Universität zu Berlin
S. Ohm - University of Leicester
E. de Oña Wilhelmi - Max Planck Institute for Nuclear Physics
B. Opitz - Universität Hamburg
M. Ostrowski - Jagiellonian University
I. Oya
M. Panter - Max Planck Institute for Nuclear Physics
R. D. Parsons - Max Planck Institute for Nuclear Physics
M. Paz Arribas
N. W. Pekeur - North-West University
G. Pelletier - Centre National de la Recherche Scientifique
J. Perez - Universität Innsbruck
P.-O. Petrucci - Institut de Planétologie et d'Astrophysique de Grenoble
B. Peyaud - Institut de Recherche sur les Lois Fondamentales de l'Univers
S. Pita - Université Paris Cité
H. Poon - Max Planck Institute for Nuclear Physics
G. Pühlhofer - University of Tübingen
M. Punch - Délégation Paris 7
A. Quirrenbach - Heidelberg University
S. Raab - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Raue - Universität Hamburg
A. Reimer - Universität Innsbruck
O. Reimer - Universität Innsbruck
Matthieu Renaud - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
R. de Los Reyes - Max Planck Institute for Nuclear Physics
F. Rieger - Max Planck Institute for Nuclear Physics
L. Rob - Charles University
C. Romoli - Dublin Institute For Advanced Studies
S. Rosier-Lees - Laboratoire d’Annecy de Physique des Particules
G. Rowell - University of Adelaide
B. Rudak - Nicolaus Copernicus Astronomical Center
C. B. Rulten - Délégation Paris 7
V. Sahakian - A. Alikhanyan National Laboratory
D. A. Sanchez - Laboratoire d’Annecy de Physique des Particules
A. Santangelo - University of Tübingen
R. Schlickeiser - Ruhr University Bochum
F. Schüssler
A. Schulz
U. Schwanke - Humboldt-Universität zu Berlin
S. Schwarzburg - University of Tübingen
S. Schwemmer - Heidelberg University
H. Sol - Délégation Paris 7
G. Spengler - Humboldt-Universität zu Berlin
F. Spies - Universität Hamburg
Ł. Stawarz - Jagiellonian University
R. Steenkamp - University of Namibia
C. Stegmann - University of Potsdam
F. Stinzing - Friedrich-Alexander-Universität Erlangen-Nürnberg
K. Stycz
I. Sushch - Humboldt-Universität zu Berlin
A. Szostek - Jagiellonian University
J.-P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
T. Tavernier - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
A. M. Taylor - Dublin Institute For Advanced Studies
R. Terrier - Centre National de la Recherche Scientifique
M. Tluczykont - Universität Hamburg
C. Trichard - Laboratoire d’Annecy de Physique des Particules
K. Valerius - Friedrich-Alexander-Universität Erlangen-Nürnberg
C. van Eldik - Friedrich-Alexander-Universität Erlangen-Nürnberg
B. van Soelen - University of the Free State
George Vasileiadis - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
C. Venter - North-West University
A. Viana - Max Planck Institute for Nuclear Physics
P. Vincent - Laboratoire de Physique Nucléaire et de Hautes Énergies
H. J. Völk - Max Planck Institute for Nuclear Physics
F. Volpe - Max Planck Institute for Nuclear Physics
M. Vorster - North-West University
T. Vuillaume - Institut de Planétologie et d'Astrophysique de Grenoble
S. J. Wagner - Heidelberg University
P. Wagner - Humboldt-Universität zu Berlin
M. Ward - Durham University
M. Weidinger - Ruhr University Bochum
Q. Weitzel - Max Planck Institute for Nuclear Physics
R. White - University of Leicester
A. Wierzcholska - Jagiellonian University
P. Willmann - Friedrich-Alexander-Universität Erlangen-Nürnberg
A. Wörnlein - Friedrich-Alexander-Universität Erlangen-Nürnberg
D. Wouters - Institut de Recherche sur les Lois Fondamentales de l'Univers
V. Zabalza - Max Planck Institute for Nuclear Physics
M. Zacharias - Ruhr University Bochum
A. Zajczyk - Université de Montpellier
A. A. Zdziarski - Nicolaus Copernicus Astronomical Center
A. Zech - Universität Hamburg
H.-S. Zechlin - Universität Hamburg
Publication Details: Astronomy & Astrophysics - A&A, Vol.564
Identifiers: 9935903409311
Academic Unit: Laboratoire Univers et Particules de Montpellier - LUPM
Language: English
Resource Type: Journal article
Local Fields: in2p3-00947917