Simultaneous multi-wavelength campaign on PKS 2005-489 in a high state

¹ Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Germany
² Laboratoire de Physique Théorique et Astroparticules, Université Montpellier 2, CNRS/IN2P3, CC 70, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
³ Max-Planck-Institut für Kernphysik, PO Box 103980, 69029 Heidelberg, Germany
⁴ Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland
⁵ National Academy of Sciences of the Republic of Armenia, Yerevan, Armenia
⁶ Yerevan Physics Institute, 2 Alikhanian Brothers St., 375036 Yerevan, Armenia
⁷ Universität Erlangen-Nürnberg, Physikalisches Institut, Erwin-Rommel-Str. 1, 91058 Erlangen, Germany
⁸ Nicolaus Copernicus Astronomical Center, ul. Bartycka 18, 00-716 Warsaw, Poland
⁹ CEA Saclay, DSM/IRFU, 91191 Gif-Sur-Yvette Cedex, France
¹⁰ University of Durham, Department of Physics, South Road, Durham DH1 3LE, UK
¹¹ Centre d’Étude Spatiale des Rayonnements, CNRS/UPS, 9 Av. du Colonel Roche, BP 4346, 31029 Toulouse Cedex 4, France
¹² Astroparticule et Cosmologie (APC), CNRS, Université Paris 7 Denis Diderot, 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13 (UMR 7164: CNRS, Université Paris VII, CEA, Observatoire de Paris), France
¹³ Laboratoire Leprince-Ringuet, École Polytechnique, CNRS/IN2P3, 91128 Palaiseau, France
e-mail: fortin@llr.in2p3.fr
¹⁴ Institut für Theoretische Physik, Lehrstuhl IV: Weltraum und Astrophysik, Ruhr-Universität Bochum, 44780 Bochum, Germany
¹⁵ Landessternwarte, Universität Heidelberg, Königstuhl, 69117 Heidelberg, Germany
e-mail: S.Kaufmann@lsw.uni-heidelberg.de
¹⁶ Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
¹⁷ LUTH, Observatoire de Paris, CNRS, Université Paris Diderot, 5 Place Jules Janssen, 92190 Meudon, France
¹⁸ LPNHE, Université Pierre et Marie Curie Paris 6, Université Denis Diderot Paris 7, CNRS/IN2P3, 4 Place Jussieu, 75252, Paris Cedex 5, France
¹⁹ Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, 72076 Tübingen, Germany
²⁰ Astronomical Observatory, The University of Warsaw, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
²¹ Unit for Space Physics, North-West University, Potchefstroom 2520, South Africa
²² Laboratoire d’Annecy-le-Vieux de Physique des Particules, Université de Savoie, CNRS/IN2P3, 74941 Annecy-le-Vieux, France
²³ Oskar Klein Centre, Department of Physics, Stockholm University, Albanova University Center, 10691 Stockholm, Sweden
²⁴ University of Namibia, Department of Physics, Private Bag 13301, Windhoek, Namibia
²⁵ Laboratoire d’Astrophysique de Grenoble, INSU/CNRS, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
²⁶ Instytut Fizyki Ja¸drowej PAN, ul. Radzikowskiego 152, 31-342 Kraków, Poland
²⁷ Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, 6020 Innsbruck, Austria
²⁸ Department of Physics and Astronomy, The University of Leicester, University Road, Leicester, LE1 7RH, UK
²⁹ Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland
³⁰ Toruń Centre for Astronomy, Nicolaus Copernicus University, ul. Gagarina 11, 87-100 Toruń, Poland
³¹ School of Chemistry & Physics, University of Adelaide, Adelaide 5005, Australia
³² Charles University, Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, V Holešovičkách 2, 180 00 Prague 8, Czech Republic
³³ European Associated Laboratory for Gamma-Ray Astronomy, jointly supported by CNRS and MPG, France
³⁴ Oskar Klein Centre, Department of Physics, Royal Institute of Technology (KTH), Albanova, 10691 Stockholm, Sweden
³⁵ School of Physics & Astronomy, University of Leeds, Leeds LS2 9JT, UK
³⁶ National Research Council Research Associate, National Academy of Sciences, Washington, DC 20001, resident at Naval Research Laboratory, Washington, DC 20375, USA
³⁷ W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305, USA
³⁸ Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, 56127 Pisa, Italy
³⁹ Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, 34127 Trieste, Italy
⁴⁰ Dipartimento di Fisica, Università di Trieste, 34127 Trieste, Italy
⁴¹ Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35131 Padova, Italy
⁴² Dipartimento di Fisica “G. Galilei”, Università di Padova, 35131 Padova, Italy
⁴³ Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, 06123 Perugia, Italy
⁴⁴ Dipartimento di Fisica, Università degli Studi di Perugia, 06123 Perugia, Italy
⁴⁵ Dipartimento di Fisica “M. Merlin” dell’Università e del Politecnico di Bari, 70126 Bari, Italy
⁴⁶ Istituto Nazionale di Fisica Nucleare, Sezione di Bari, 70126 Bari, Italy
⁴⁷ Institut de Ciencies de l’Espai (IEEC-CSIC), Campus UAB, 08193 Barcelona, Spain
⁴⁸ NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
e-mail: wmcconvi@umd.edu
⁴⁹ University College Dublin, Belfield, Dublin 4, Ireland
⁵⁰ INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica, 20133 Milano, Italy
⁵¹ Agenzia Spaziale Italiana (ASI) Science Data Center, 00044 Frascati ( Roma), Italy
⁵² Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
⁵³ Department of Physics and Center for Space Sciences and Technology, University of Maryland Baltimore County, Baltimore, MD 21250, USA
⁵⁴ Space Science Division, Naval Research Laboratory, Washington, DC 20375, USA
⁵⁵ Department of Computational and Data Sciences, George Mason University, Fairfax, VA 22030, USA
⁵⁶ Université Bordeaux 1, CNRS/IN2p3, Centre d’Études Nucléaires de Bordeaux Gradignan, 33175 Gradignan, France
⁵⁷ CNRS/IN2P3, Centre d’Études Nucléaires Bordeaux Gradignan, UMR 5797, Gradignan, 33175, France
⁵⁸ Dipartimento di Fisica, Università di Udine and Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Gruppo Collegato di Udine, 33100 Udine, Italy
⁵⁹ Osservatorio Astronomico di Trieste, Istituto Nazionale di Astrofisica, 34143 Trieste, Italy
⁶⁰ Department of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
⁶¹ INAF Istituto di Radioastronomia, 40129 Bologna, Italy
⁶² Center for Space Plasma and Aeronomic Research (CSPAR), University of Alabama in Huntsville, Huntsville, AL 35899, USA
⁶³ Department of Physics, Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA
⁶⁴ Science Institute, University of Iceland, IS-107 Reykjavik, Iceland
⁶⁵ Research Institute for Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku, 169-8555 Tokyo, Japan
⁶⁶ Centre d’Étude Spatiale des Rayonnements, CNRS/UPS, BP 44346, 30128 Toulouse Cedex 4, France
⁶⁷ Department of Physics and Department of Astronomy, University of Maryland, College Park, MD 20742, USA
⁶⁸ Istituto Nazionale di Fisica Nucleare, Sezione di Roma “Tor Vergata”, 00133 Roma, Italy
⁶⁹ Department of Physics and Astronomy, University of Denver, Denver, CO 80208, USA
⁷⁰ Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, 739-8526 Hiroshima, Japan
⁷¹ Institute of Space and Astronautical Science, JAXA, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, 252-5210 Kanagawa, Japan
⁷² Max-Planck Institut für extraterrestrische Physik, 85748 Garching, Germany
⁷³ College of Science, George Mason University, Fairfax, VA 22030, resident at Naval Research Laboratory, Washington, DC 20375, USA
⁷⁴ Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064, USA
⁷⁵ NYCB Real-Time Computing Inc., Lattingtown, NY 11560-1025, USA
⁷⁶ Department of Chemistry and Physics, Purdue University Calumet, Hammond, IN 46323-2094, USA
⁷⁷ Partially supported by the International Doctorate on Astroparticle Physics (IDAPP) program  
⁷⁸ Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
⁷⁹ Consorzio Interuniversitario per la Fisica Spaziale (CIFS), 10133 Torino, Italy
⁸⁰ INTEGRAL Science Data Centre, 1290 Versoix, Switzerland
⁸¹ NASA Postdoctoral Program Fellow, USA
⁸² Dipartimento di Fisica, Università di Roma “Tor Vergata”, 00133 Roma, Italy
⁸³ Department of Physics, Royal Institute of Technology (KTH), AlbaNova, 106 91 Stockholm, Sweden
⁸⁴ School of Pure and Applied Natural Sciences, University of Kalmar, 391 82 Kalmar, Sweden

Received: 19 November 2010
Accepted: 15 March 2011

Abstract

The high-frequency peaked BL Lac object PKS 2005-489 was the target of a multi-wavelength campaign with simultaneous observations in the TeV γ-ray (H.E.S.S.), GeV γ-ray (Fermi/LAT), X-ray (RXTE, Swift), UV (Swift) and optical (ATOM, Swift) bands. This campaign was carried out during a high flux state in the synchrotron regime. The flux in the optical and X-ray bands reached the level of the historical maxima. The hard GeV spectrum observed with Fermi/LAT connects well to the very high energy (VHE, E > 100   GeV) spectrum measured with H.E.S.S.