Long-term monitoring of PKS 2155-304 with ATOM and H.E.S.S.: investigation of optical/gamma-ray correlations in different spectral states

A. Abramowski; F. Aharonian; F. Ait Benkhali; A. G. Akhperjanian; E. O. Angüner; M. Backes; S. Balenderan; Agnès Balzer; A. Barnacka; Y. Becherini; J. Becker Tjus; D. Berge; S. Bernhard; K. Bernlöhr; E. Birsin; J. Biteau; M. Böttcher; C. Boisson; J. Bolmont; P. Bordas; J. Bregeon; F. Brun; P. Brun; M. Bryan; T. Bulik; S. Carrigan; S. Casanova; P. M. Chadwick; N. Chakraborty; R. Chalme-Calvet; R. C. G. Chaves; M. Chrétien; S. Colafrancesco; G. Cologna; J. Conrad; C. Couturier; Y. Cui; M. Dalton; I. D. Davids; B. Degrange; C. Deil; P. Dewilt; A. Djannati-Ataï; W. Domainko; A. Donath; 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; S. Gabici; M. Gajdus; Y. A. Gallant; T. Garrigoux; G. Giavitto; B. Giebels; J. F. Glicenstein; D. Gottschall; M.-H. Grondin; M. Grudzińska; D. Hadsch; 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. Ivascenko; 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; D. Kolitzus; Nu. Komin; K. Kosack; S. Krakau; F. Krayzel; P. P. Krüger; H. Laffon; G. Lamanna; J. Lefaucheur; V. Lefranc; A. Lemière; M. Lemoine-Goumard; J.-P. Lenain; T. Lohse; A. Lopatin; C.-C. Lu; V. Marandon; A. Marcowith; R. Marx; G. Maurin; N. Maxted; M. Mayer; T. J. L. Mccomb; J. Méhault; P. J. Meintjes; U. Menzler; M. Meyer; A. M. W. Mitchell; R. Moderski; M. Mohamed; K. Morå; Emmanuel Moulin; T. Murach; M. de Naurois; J. Niemiec; S. J. Nolan; L. Oakes; H. Odaka; S. Ohm; 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; I. Reichardt; 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. Salek; D. A. Sanchez; A. Santangelo; R. Schlickeiser; F. Schüssler; A. Schulz; U. Schwanke; S. Schwarzburg; S. Schwemmer; H. Sol; F. Spanier; G. Spengler; F. Spies; Ł. Stawarz; R. Steenkamp; C. Stegmann; F. Stinzing; K. Stycz; I. Sushch; J.-P. Tavernet; T. Tavernier; A. M. Taylor; R. Terrier; M. Tluczykont; C. Trichard; K. Valerius; C. van Eldik; B. van Soelen; George Vasileiadis; J. Veh; C. Venter; A. Viana; P. Vincent; J. Vink; H. J. Völk; F. Volpe; M. Vorster; T. Vuillaume; S. J. Wagner; P. Wagner; R. M. Wagner; M. Ward; M. Weidinger; Q. Weitzel; R. White; A. Wierzcholska; P. Willmann; A. Wörnlein; D. Wouters; R. Yang; V. Zabalza; D. Zaborov; M. Zacharias; A. A. Zdziarski; A. Zech; H.-S. Zechlin

doi:10.1051/0004-6361/201424142

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Long-term monitoring of PKS 2155-304 with ATOM and H.E.S.S.: investigation of optical/gamma-ray correlations in different spectral states

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Long-term monitoring of PKS 2155-304 with ATOM and H.E.S.S.: investigation of optical/gamma-ray correlations in different spectral states

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

Astronomy & Astrophysics - A&A, Vol.571

2014

DOI: https://doi.org/10.1051/0004-6361/201424142

Abstract

In this paper we report on the analysis of all the available optical and very high-energy $\gamma$-ray ($>$200 GeV) data for the BL Lac object PKS 2155$-$304, collected simultaneously with the ATOM and H.E.S.S. telescopes from 2007 until 2009. This study also includes X-ray (RXTE, Swift) and high-energy $\gamma$-ray (Fermi-LAT) data. During the period analysed, the source was transitioning from its flaring to quiescent optical states,and was characterized by only moderate flux changes at different wavelengths on the timescales of days and months. A flattening of the optical continuum with an increasing optical flux can be noted in the collected dataset, but only occasionally and only at higher flux levels. We did not find any universal relation between the very high-energy $\gamma$-ray and optical flux changes on the timescales from days and weeks up to several years. On the other hand, we noted that at higher flux levels the source can follow two distinct tracks in the optical flux-colour diagrams, which seem to be related to distinct $\gamma$-ray states of the blazar. The obtained results therefore indicate a complex scaling between the optical and $\gamma$-ray emission of PKS 2155$-$304, with different correlation patterns holding at different epochs, and a $\gamma$-ray flux depending on the combination of an optical flux and colour rather than a flux alone.

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Title: Long-term monitoring of PKS 2155-304 with ATOM and H.E.S.S.: investigation of optical/gamma-ray correlations in different spectral states
Creators - without role: A. Abramowski - Universität Hamburg
F. Aharonian - Max Planck Institute for Nuclear Physics
F. Ait Benkhali
A. G. Akhperjanian - National Academy of Sciences of Armenia
E. O. Angüner - Humboldt-Universität zu Berlin
M. Backes - University of Namibia
S. Balenderan - Durham University
Agnès Balzer - University of Amsterdam
A. Barnacka - Center for Astrophysics Harvard & Smithsonian
Y. Becherini - Linnaeus University
J. Becker Tjus
D. Berge - University of Amsterdam
S. Bernhard - Universität Innsbruck
K. Bernlöhr - Max Planck Institute for Nuclear Physics
E. Birsin - Humboldt-Universität zu Berlin
J. Biteau - Centre National de la Recherche Scientifique
M. Böttcher - North-West University
C. Boisson - Centre National de la Recherche Scientifique
J. Bolmont - Laboratoire de Physique Nucléaire et de Hautes Énergies
P. Bordas - University of Tübingen
J. Bregeon - Institut National de Physique Nucléaire et de Physique des Particules
F. Brun - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
P. Brun - Institut de Recherche sur les Lois Fondamentales de l'Univers
M. Bryan - University of Amsterdam
T. Bulik - University of Warsaw
S. Carrigan - Max Planck Institute for Nuclear Physics
S. Casanova - Institute of Nuclear Physics, Polish Academy of Sciences
P. M. Chadwick - Durham University
N. Chakraborty - Max Planck Institute for Nuclear Physics
R. Chalme-Calvet - Sorbonne Université
R. C. G. Chaves - Université de Montpellier
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
I. D. Davids - North-West University
B. Degrange - École Polytechnique
C. Deil - Max Planck Institute for Nuclear Physics
P. Dewilt - University of Adelaide
A. Djannati-Ataï - AstroParticule et Cosmologie
W. Domainko - Max Planck Institute for Nuclear Physics
A. Donath - Max Planck Institute for Nuclear Physics
L. O’c. Drury - Dublin Institute For Advanced Studies
G. Dubus - Centre National de la Recherche Scientifique
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 - University of Potsdam
P. Eger - Max Planck Institute for Nuclear Physics
P. Espigat - Université Paris Cité
C. Farnier - Stockholm University
S. Fegan - Laboratoire Leprince-Ringuet
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
S. Gabici - Université Paris Cité
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
D. Gottschall - University of Tübingen
M.-H. Grondin - Max Planck Institute for Nuclear Physics
M. Grudzińska - University of Warsaw
D. Hadsch - Universität Innsbruck
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. Ivascenko - North-West University
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 - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
Michel Kieffer - Sorbonne Université
S. Klepser
D. Klochkov - University of Tübingen
W. Kluźniak - Nicolaus Copernicus Astronomical Center
D. Kolitzus - Universität Innsbruck
Nu. Komin - University of the Witwatersrand
K. Kosack - Institut de Recherche sur les Lois Fondamentales de l'Univers
S. Krakau - Ruhr University Bochum
F. Krayzel - Laboratoire d’Annecy de Physique des Particules
P. P. Krüger - North-West University
H. Laffon - Laboratoire de Physique des deux infinis Bordeaux
G. Lamanna - Centre National de la Recherche Scientifique
J. Lefaucheur - Délégation Paris 7
V. Lefranc - Institut de Recherche sur les Lois Fondamentales de l'Univers
A. Lemière - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
M. Lemoine-Goumard - Laboratoire de Physique des deux infinis Bordeaux
J.-P. Lenain - Université Paris Cité
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
A. Marcowith - Centre National de la Recherche Scientifique
R. Marx - Max Planck Institute for Nuclear Physics
G. Maurin - Institut National de Physique Nucléaire et de Physique des Particules
N. Maxted - University of Adelaide
M. Mayer - University of Potsdam
T. J. L. Mccomb - Durham University
J. Méhault - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
P. J. Meintjes - University of the Free State
U. Menzler - Ruhr University Bochum
M. Meyer - Stockholm University
A. M. W. Mitchell
R. Moderski - Nicolaus Copernicus Astronomical Center
M. Mohamed - Heidelberg University
K. Morå - Stockholm University
Emmanuel Moulin - Institut de Recherche sur les Lois Fondamentales de l'Univers
T. Murach - Humboldt-Universität zu Berlin
M. de Naurois - Laboratoire Leprince-Ringuet
J. Niemiec - Institute of Nuclear Physics, Polish Academy of Sciences
S. J. Nolan - Durham University
L. Oakes - Humboldt-Universität zu Berlin
H. Odaka - Max Planck Institute for Nuclear Physics
S. Ohm
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 - Centre National de la Recherche Scientifique
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 - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
A. Quirrenbach - Heidelberg University
S. Raab - Friedrich-Alexander-Universität Erlangen-Nürnberg
I. Reichardt - Délégation Paris 7
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. Salek - University of Amsterdam
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 - Centre National de la Recherche Scientifique
F. Spanier - North-West University
G. Spengler - Stockholm University
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 - North-West University
J.-P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
T. Tavernier - Délégation Paris 7
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
J. Veh - Friedrich-Alexander-Universität Erlangen-Nürnberg
C. Venter - North-West University
A. Viana - Max Planck Institute for Nuclear Physics
P. Vincent - Université Paris Cité
J. Vink - University of Amsterdam
H. J. Völk - Max Planck Institute for Nuclear Physics
F. Volpe - Max Planck Institute for Nuclear Physics
M. Vorster - North-West University
T. Vuillaume - Centre National de la Recherche Scientifique
S. J. Wagner - Heidelberg University
P. Wagner - Humboldt-Universität zu Berlin
R. M. Wagner - Stockholm University
M. Ward - Durham University
M. Weidinger - Ruhr University Bochum
Q. Weitzel - Max Planck Institute for Nuclear Physics
R. White - University of Leicester
A. Wierzcholska - Institute of Nuclear Physics, Polish Academy of Sciences
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
R. Yang - Max Planck Institute for Nuclear Physics
V. Zabalza - University of Leicester
D. Zaborov - École Polytechnique
M. Zacharias - Heidelberg University
A. A. Zdziarski - Nicolaus Copernicus Astronomical Center
A. Zech - Universität Hamburg
H.-S. Zechlin - Universität Hamburg
Publication Details: Astronomy & Astrophysics - A&A, Vol.571
Identifiers: 9936202409311
Academic Unit: Laboratoire Univers et Particules de Montpellier - LUPM
Language: English
Resource Type: Journal article
Local Fields: in2p3-01061878