Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Multi-wavelength observations of blazar AO 0235+164 in the 2008-2009 flaring state
Astrophysical Journal, Volume 751, No. 2, Article 159, Year 2012
Notification
URL copied to clipboard!
Description
The blazar AO 0235+164 (z = 0.94) has been one of the most active objects observed by Fermi Large Area Telescope (LAT) since its launch in Summer 2008. In addition to the continuous coverage by Fermi, contemporaneous observations were carried out from the radio to γ-ray bands between 2008 September and 2009 February. In this paper, we summarize the rich multi-wavelength data collected during the campaign (including F-GAMMA, GASP-WEBT, Kanata, OVRO, RXTE, SMARTS, Swift, and other instruments), examine the cross-correlation between the light curves measured in the different energy bands, and interpret the resulting spectral energy distributions in the context of well-known blazar emission models. We find that the γ-ray activity is well correlated with a series of near-IR/optical flares, accompanied by an increase in the optical polarization degree. On the other hand, the X-ray light curve shows a distinct 20 day high state of unusually soft spectrum, which does not match the extrapolation of the optical/UV synchrotron spectrum. We tentatively interpret this feature as the bulk Compton emission by cold electrons contained in the jet, which requires an accretion disk corona with an effective covering factor of 19% at a distance of 100 R g. We model the broadband spectra with a leptonic model with external radiation dominated by the infrared emission from the dusty torus. © 2012. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Ackermann, Markus
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Ajello, Marco
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Ballet, Jean
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Barbiellini, Guido
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Trieste
Università Degli Studi Di Trieste
Bastieri, D.
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Italy, Padua
Università Degli Studi Di Padova
Bellazzini, Ronaldo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Blandford, Rogerd D.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Bloom, Elliott D.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Bonamente, Emanuele
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Borgland, Anders W.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Bottacini, Eugenio
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Bregeon, Johan
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Brigida, Monica
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Bruel, Philippe V.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Buehler, Rolf
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Buson, Sara
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Italy, Padua
Università Degli Studi Di Padova
Caliandro, Giuseppe Andrea
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Cameron, Robert A.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Caraveo, Patrizia A.
Italy, Milan
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Milan
Casandjian, Jean Marc
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Cavazzuti, Elisabetta
Italy, Rome
Agenzia Spaziale Italiana
Cecchi, Claudia
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Charles, Eric
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Chekhtman, Alexandre
United States, Washington, D.c.
U.s. Naval Research Laboratory
Chiang, James
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Ciprini, Stefano
Italy, Perugia
Università Degli Studi Di Perugia
Italy, Frascati
Asi Science Data Center
Claus, Richard
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Cohen-Tanugi, Johann
France, Montpellier
Université de Montpellier
Cutini, S.
Italy, Rome
Agenzia Spaziale Italiana
D'Ammando, Filippo
Italy, Palermo
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica Di Palermo
Italy, Rome
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Rome
de Palma, Francesco
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Dermer, Charles Dennison
United States, Washington, D.c.
U.s. Naval Research Laboratory
Drell, Persis S.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Drlica-Wagner, Alex
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Dubois, Richard
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Favuzzi, Cecilia
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Fegan, Stephen J.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Ferrara, Elizabeth C.
United States, Greenbelt
Nasa Goddard Space Flight Center
Focke, Warren B.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Fortin, Pascal
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Fuhrmann, Lars
Germany, Bonn
Max Planck Institute for Radio Astronomy
Fukazawa, Yasushi
Japan, Higashihiroshima
Hiroshima University
Fusco, Piergiorgio G.
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Gargano, Fabio
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Gasparrini, Dario
Italy, Rome
Agenzia Spaziale Italiana
Gehrels, Neil C.
United States, Greenbelt
Nasa Goddard Space Flight Center
Germani, Stefano
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Giglietto, Nicola
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Giommi, Paolo
Italy, Rome
Agenzia Spaziale Italiana
Giordano, Francesco
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Giroletti, Marcello
Italy, Bologna
Istituto Di Radioastronomia, Bologna
Glanzman, Thomas
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Godfrey, Gary L.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Grenier, Isabelle A.
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Guiriec, Sylvain
United States, Huntsville
The University of Alabama in Huntsville
Hadasch, Daniela
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Hayashida, Masaaki
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Japan, Kyoto
Kyoto University
Hughes, Richard E.
United States, Columbus
The Ohio State University
Itoh, Ryosuke
Japan, Higashihiroshima
Hiroshima University
Jóhannesson, Gudlaugur
Iceland, Reykjavik
Haskoli Islands
Johnson, Anthony S.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Katagiri, Hideaki
Japan, Mito
Ibaraki University
Kataoka, Jun
Japan, Tokyo
Waseda University
Kn̈odlseder, Jürgen
France, Paris
Cnrs Centre National de la Recherche Scientifique
France, Toulouse
Observatoire Midi-pyrénées
Kuss, Michael W.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Lande, Joshua
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Larsson, Stefan
Sweden, Stockholm
Stockholms Universitet
Sweden, Stockholm
Oskar Klein Centre
Longo, Francesco
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Trieste
Università Degli Studi Di Trieste
Loparco, Francesco
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Lott, Benoît
France, Bordeaux
Université de Bordeaux
Lovellette, Michael N.
United States, Washington, D.c.
U.s. Naval Research Laboratory
Lubrano, Pasquale
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Madejski, Grzegorz M.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Mazziotta, Mario Nicola
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
McEnery, Julie E.
United States, Greenbelt
Nasa Goddard Space Flight Center
United States, College Park
University of Maryland, College Park
Méhault, Jérémie
France, Montpellier
Université de Montpellier
Michelson, Peter F.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Mitthumsiri, Warit
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Mizuno, Tsunefumi
Japan, Higashihiroshima
Hiroshima University
Monzani, Maria Elena
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Morselli, Aldo
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Moskalenko, Igor V.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Murgia, Simona
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Naumann-Godó, Melitta
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Nuss, Eric
France, Montpellier
Université de Montpellier
Ohsugi, Takashi
Japan, Higashihiroshima
Hiroshima University
Omodei, Nicola
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Orlando, E.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Germany, Garching Bei Munchen
Max Planck Institute for Extraterrestrial Physics
Paneque, David
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Pelassa, Vèronique
United States, Huntsville
The University of Alabama in Huntsville
Pesce-Rollins, Melissa
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Piron, Frédéric
France, Montpellier
Université de Montpellier
Pivato, Giovanna
Italy, Padua
Università Degli Studi Di Padova
Porter, Troy A.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Rainó, Silvia
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Rando, Riccardo
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Italy, Padua
Università Degli Studi Di Padova
Razzano, Massimiliano
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
United States, Santa Cruz
University of California, Santa Cruz
Readhead, Anthony C.S.
United States, Pasadena
California Institute of Technology
Reimer, Anita
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Austria, Innsbruck
Universität Innsbruck
Reimer, Olaf
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Austria, Innsbruck
Universität Innsbruck
Reyes, Luis C.
United States, San Luis Obispo
California Polytechnic State University, San Luis Obispo
Richards, Joseph L.
United States, Pasadena
California Institute of Technology
Sgro', Carmelo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Siskind, Eric J.
United States, Rocky Point
Nycb Realtime Computing Inc.
Spandre, G.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Spinelli, Paolo
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Takahashi, Hiromitsu
Japan, Higashihiroshima
Hiroshima University
Thayer, Jana B.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Thompson, David J.
United States, Greenbelt
Nasa Goddard Space Flight Center
Tinivella, M.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Torres, Diego F.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Spain, Barcelona
Institució Catalana de Recerca I Estudis Avançats
Tosti, Gino
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Troja, Eleonora
United States, Greenbelt
Nasa Goddard Space Flight Center
Usher, Tracy L.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Vandenbroucke, Justin A.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Vianello, Giacomo
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Vitale, V.
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Waite, A. P.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Wood, Kent S.
United States, Washington, D.c.
U.s. Naval Research Laboratory
Zimmer, Stephan
Sweden, Stockholm
Stockholms Universitet
Sweden, Stockholm
Oskar Klein Centre
Moderski, Rafaƚ
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Nalewajko, Krzysztof
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
United States, Boulder
University of Colorado Boulder
Sikora, Marek
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Villata, Massimo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Raiteri, Claudia M.
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Aller, Hugh D.
United States, Ann Arbor
University of Michigan, Ann Arbor
Aller, M. F.
United States, Ann Arbor
University of Michigan, Ann Arbor
Arkharov, Arkady A.H.
Russian Federation, Saint Petersburg
Pulkovo Observatory of the Russian Academy of Sciences
Benítez, E.
Mexico, Mexico
Universidad Nacional Autónoma de México
Berdyugin, Andrei V.
Finland, Turku
Turun Yliopisto
Blinov, Dmitry A.
Russian Federation, Saint Petersburg
Pulkovo Observatory of the Russian Academy of Sciences
Boettcher, M.
United States, Athens
Ohio University
Bravo Calle, O. J.A.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Buemi, Carla S.
Italy, Catania
Osservatorio Astrofisico Di Catania
Carosati, Daniele
Spain, La Palma
Ept Observatories
Spain, Brena Baja
Fundación Galileo Galilei
Chen, Wenping
Taiwan, Taoyuan
National Central University
Diltz, Chris
United States, Athens
Ohio University
Efimova, Natalia V.
Russian Federation, Saint Petersburg
Pulkovo Observatory of the Russian Academy of Sciences
Russian Federation, Saint Petersburg
Saint Petersburg State University
Forné, E.
Unknown Affiliation
Gurwell, Mark A.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Heidt, Jochen
Germany, Heidelberg
Universität Heidelberg
Hiriart, David
Mexico, Mexico
Universidad Nacional Autónoma de México
Kimeridze, Givi N.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Grishina, Tatiana S.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Kopatskaya, Evgenia N.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Koptelova, Ekaterina A.
Taiwan, Taoyuan
National Central University
Taiwan, Taipei
National Taiwan University
Kurtanidze, Omar M.
Georgia, Abastumani
Abastumani Astrophysical Observatory
L¨ahteenm¨aki, Anne A.
Finland, Espoo
Aalto University
Larionova, Elena G.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Larionova, Liudmilla V.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Larionov, Valeri M.
Russian Federation, Saint Petersburg
Pulkovo Observatory of the Russian Academy of Sciences
Russian Federation, Saint Petersburg
Saint Petersburg State University
Russian Federation, Saint Petersburg (ex Leningrad)
Isaac Newton Institute of Chile
Leto, Paolo
Italy, Catania
Osservatorio Astrofisico Di Catania
Lindfors, Elina J.
Finland, Turku
Turun Yliopisto
Lin, Hungchin
Taiwan, Taoyuan
National Central University
Morozova, Daria A.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Nikolashvili, M. G.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Nilsson, Kari
Finland, Turku
Turun Yliopisto
Roustazadeh, Parisa
United States, Athens
Ohio University
Sievers, Albrecht W.
Unknown Affiliation
Sigua, Lorand A.
Georgia, Abastumani
Abastumani Astrophysical Observatory
Sillanp̈äa, Aimo K.
Finland, Turku
Turun Yliopisto
Takahashi, Tadayuki
Japan, Chofu
Japan Aerospace Exploration Agency
Takalo, Leo O.
Finland, Turku
Turun Yliopisto
Tornikoski, Merja
Finland, Espoo
Aalto University
Trigilio, Corrado
Italy, Catania
Osservatorio Astrofisico Di Catania
Troitsky, Ivan S.
Russian Federation, Saint Petersburg
Saint Petersburg State University
Umana, Grazia
Italy, Catania
Osservatorio Astrofisico Di Catania
Angelakis, Emmanouil
Germany, Bonn
Max Planck Institute for Radio Astronomy
Krichbaum, Thomas P.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Nestoras, Ioannis
Germany, Bonn
Max Planck Institute for Radio Astronomy
Krips, Melanie
France, Saint Martin D'heres
Iram Institut de Radioastronomie Millimétrique
Trippe, Sascha
South Korea, Seoul
Seoul National University
Arai, Akira
Japan, Kyoto
Kyoto University
Kawabata, Koji S.
Japan, Higashihiroshima
Hiroshima University
Sasada, Mahito
Japan, Higashihiroshima
Hiroshima University
Sato, Shuji
Japan, Nagoya
Nagoya University
Uemura, Makoto
Japan, Higashihiroshima
Hiroshima University
Yamanaka, Masayuki
Japan, Higashihiroshima
Hiroshima University
Yoshida, Michitoshi
Japan, Higashihiroshima
Hiroshima University
Belloni, Tomaso M.
Italy, Merate
Osservatorio Astronomico Di Brera
Tagliaferri, Gianpiero
Italy, Merate
Osservatorio Astronomico Di Brera
Bonning, Erin Wells
United States, New Haven
Yale University
Isler, Jedidah C.
United States, New Haven
Yale University
Urry, Claudia Megan
United States, New Haven
Yale University
Falcone, Abraham D.
United States, University Park
Pennsylvania State University
Pagani, Claudio
United Kingdom, Leicester
University of Leicester
Stroh, Michael Cullen
United States, University Park
Pennsylvania State University
Statistics
Citations: 53
Authors: 187
Affiliations: 77
Identifiers
Doi:
10.1088/0004-637X/751/2/159
ISSN:
0004637X
Research Areas
Cancer
Environmental
Health System And Policy