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MULTI-WAVELENGTH OBSERVATIONS OF BLAZAR AO 0235+164 IN THE 2008-2009 FLARING STATE
- Ackermann, M. (author)
- Ajello, M. (author)
- Ballet, J. (author)
- show more...
- Barbiellini, G. (author)
- Bastieri, D. (author)
- Bellazzini, R. (author)
- Blandford, R. D. (author)
- Bloom, E. D. (author)
- Bonamente, E. (author)
- Borgland, A. W. (author)
- Bottacini, E. (author)
- Bregeon, J. (author)
- Brigida, M. (author)
- Bruel, P. (author)
- Buehler, R. (author)
- Buson, S. (author)
- Caliandro, G. A. (author)
- Cameron, R. A. (author)
- Caraveo, P. A. (author)
- Casandjian, J. M. (author)
- Cavazzuti, E. (author)
- Cecchi, C. (author)
- Charles, E. (author)
- Chekhtman, A. (author)
- Chiang, J. (author)
- Ciprini, S. (author)
- Claus, R. (author)
- Cohen-Tanugi, J. (author)
- Cutini, S. (author)
- D'Ammando, F. (author)
- de Palma, F. (author)
- Dermer, C. D. (author)
- do Couto e Silva, E. (author)
- Drell, P. S. (author)
- Drlica-Wagner, A. (author)
- Dubois, R. (author)
- Favuzzi, C. (author)
- Fegan, S. J. (author)
- Ferrara, E. C. (author)
- Focke, W. B. (author)
- Fortin, P. (author)
- Fuhrmann, L. (author)
- Fukazawa, Y. (author)
- Fusco, P. (author)
- Gargano, F. (author)
- Gasparrini, D. (author)
- Gehrels, N. (author)
- Germani, S. (author)
- Giglietto, N. (author)
- Giommi, P. (author)
- Giordano, F. (author)
- Giroletti, M. (author)
- Glanzman, T. (author)
- Godfrey, G. (author)
- Grenier, I. A. (author)
- Guiriec, S. (author)
- Hadasch, D. (author)
- Hayashida, M. (author)
- Hughes, R. E. (author)
- Itoh, R. (author)
- Johannesson, G. (author)
- Johnson, A. S. (author)
- Katagiri, H. (author)
- Kataoka, J. (author)
- Knoedlseder, J. (author)
- Kuss, M. (author)
- Lande, J. (author)
- Lee, S. -H. (author)
- Longo, F. (author)
- Loparco, F. (author)
- Lott, B. (author)
- Lovellette, M. N. (author)
- Lubrano, P. (author)
- Madejski, G. M. (author)
- Mazziotta, M. N. (author)
- McEnery, J. E. (author)
- Mehault, J. (author)
- Michelson, P. F. (author)
- Mitthumsiri, W. (author)
- Mizuno, T. (author)
- Monte, C. (author)
- Monzani, M. E. (author)
- Morselli, A. (author)
- Moskalenko, I. V. (author)
- Murgia, S. (author)
- Naumann-Godo, M. (author)
- Nishino, S. (author)
- Norris, J. P. (author)
- Nuss, E. (author)
- Ohsugi, T. (author)
- Okumura, A. (author)
- Omodei, N. (author)
- Orlando, E. (author)
- Ozaki, M. (author)
- Paneque, D. (author)
- Panetta, J. H. (author)
- Pelassa, V. (author)
- Pesce-Rollins, M. (author)
- Pierbattista, M. (author)
- Piron, F. (author)
- Pivato, G. (author)
- Porter, T. A. (author)
- Raino, S. (author)
- Rando, R. (author)
- Rastawicki, D. (author)
- Razzano, M. (author)
- Readhead, A. (author)
- Reimer, A. (author)
- Reimer, O. (author)
- Reyes, L. C. (author)
- Richards, J. L. (author)
- Sbarra, C. (author)
- Sgro, C. (author)
- Siskind, E. J. (author)
- Spandre, G. (author)
- Spinelli, P. (author)
- Szostek, A. (author)
- Takahashi, H. (author)
- Tanaka, T. (author)
- Thayer, J. G. (author)
- Thayer, J. B. (author)
- Thompson, D. J. (author)
- Tinivella, M. (author)
- Torres, D. F. (author)
- Tosti, G. (author)
- Troja, E. (author)
- Usher, T. L. (author)
- Vandenbroucke, J. (author)
- Vasileiou, V. (author)
- Vianello, G. (author)
- Vitale, V. (author)
- Waite, A. P. (author)
- Winer, B. L. (author)
- Wood, K. S. (author)
- Moderski, R. (author)
- Nalewajko, K. (author)
- Sikora, M. (author)
- Villata, M. (author)
- Raiteri, C. M. (author)
- Aller, H. D. (author)
- Aller, M. F. (author)
- Arkharov, A. A. (author)
- Benitez, E. (author)
- Berdyugin, A. (author)
- Blinov, D. A. (author)
- Boettcher, M. (author)
- Calle, O. J. A. Bravo (author)
- Buemi, C. S. (author)
- Carosati, D. (author)
- Chen, W. P. (author)
- Diltz, C. (author)
- Di Paola, A. (author)
- Dolci, M. (author)
- Efimova, N. V. (author)
- Forne, E. (author)
- Gurwell, M. A. (author)
- Heidt, J. (author)
- Hiriart, D. (author)
- Jordan, B. (author)
- Kimeridze, G. (author)
- Konstantinova, T. S. (author)
- Kopatskaya, E. N. (author)
- Koptelova, E. (author)
- Kurtanidze, O. M. (author)
- Lahteenmaki, A. (author)
- Larionova, E. G. (author)
- Larionova, L. V. (author)
- Larionov, V. M. (author)
- Leto, P. (author)
- Lindfors, E. (author)
- Lin, H. C. (author)
- Morozova, D. A. (author)
- Nikolashvili, M. G. (author)
- Nilsson, K. (author)
- Oksman, M. (author)
- Roustazadeh, P. (author)
- Sievers, A. (author)
- Sigua, L. A. (author)
- Sillanpaa, A. (author)
- Takahashi, T. (author)
- Takalo, L. O. (author)
- Tornikoski, M. (author)
- Trigilio, C. (author)
- Troitsky, I. S. (author)
- Umana, G. (author)
- Angelakis, E. (author)
- Krichbaum, T. P. (author)
- Nestoras, I. (author)
- Riquelme, D. (author)
- Krips, M. (author)
- Trippe, S. (author)
- Arai, A. (author)
- Kawabata, K. S. (author)
- Sakimoto, K. (author)
- Sasada, M. (author)
- Sato, S. (author)
- Uemura, M. (author)
- Yamanaka, M. (author)
- Yoshida, M. (author)
- Belloni, T. (author)
- Tagliaferri, G. (author)
- Bonning, E. W. (author)
- Isler, J. (author)
- Urry, C. M. (author)
- Hoversten, E. (author)
- Falcone, A. (author)
- Pagani, C. (author)
- Stroh, M. (author)
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- (creator_code:org_t)
- 2012
- 2012
- English.
- In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 751:2
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- The blazarAO 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 gamma-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 gamma-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.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- BL Lacertae objects: individual (AO 0235+164)
- galaxies: active
- galaxies: jets
- gamma rays: galaxies
- radiation mechanisms: non-thermal
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Ackermann, M.
- Ajello, M.
- Ballet, J.
- Barbiellini, G.
- Bastieri, D.
- Bellazzini, R.
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- Blandford, R. D.
- Bloom, E. D.
- Bonamente, E.
- Borgland, A. W.
- Bottacini, E.
- Bregeon, J.
- Brigida, M.
- Bruel, P.
- Buehler, R.
- Buson, S.
- Caliandro, G. A.
- Cameron, R. A.
- Caraveo, P. A.
- Casandjian, J. M ...
- Cavazzuti, E.
- Cecchi, C.
- Charles, E.
- Chekhtman, A.
- Chiang, J.
- Ciprini, S.
- Claus, R.
- Cohen-Tanugi, J.
- Cutini, S.
- D'Ammando, F.
- de Palma, F.
- Dermer, C. D.
- do Couto e Silva ...
- Drell, P. S.
- Drlica-Wagner, A ...
- Dubois, R.
- Favuzzi, C.
- Fegan, S. J.
- Ferrara, E. C.
- Focke, W. B.
- Fortin, P.
- Fuhrmann, L.
- Fukazawa, Y.
- Fusco, P.
- Gargano, F.
- Gasparrini, D.
- Gehrels, N.
- Germani, S.
- Giglietto, N.
- Giommi, P.
- Giordano, F.
- Giroletti, M.
- Glanzman, T.
- Godfrey, G.
- Grenier, I. A.
- Guiriec, S.
- Hadasch, D.
- Hayashida, M.
- Hughes, R. E.
- Itoh, R.
- Johannesson, G.
- Johnson, A. S.
- Katagiri, H.
- Kataoka, J.
- Knoedlseder, J.
- Kuss, M.
- Lande, J.
- Larsson, Stefan
- Lee, S. -H.
- Longo, F.
- Loparco, F.
- Lott, B.
- Lovellette, M. N ...
- Lubrano, P.
- Madejski, G. M.
- Mazziotta, M. N.
- McEnery, J. E.
- Mehault, J.
- Michelson, P. F.
- Mitthumsiri, W.
- Mizuno, T.
- Monte, C.
- Monzani, M. E.
- Morselli, A.
- Moskalenko, I. V ...
- Murgia, S.
- Naumann-Godo, M.
- Nishino, S.
- Norris, J. P.
- Nuss, E.
- Ohsugi, T.
- Okumura, A.
- Omodei, N.
- Orlando, E.
- Ozaki, M.
- Paneque, D.
- Panetta, J. H.
- Pelassa, V.
- Pesce-Rollins, M ...
- Pierbattista, M.
- Piron, F.
- Pivato, G.
- Porter, T. A.
- Raino, S.
- Rando, R.
- Rastawicki, D.
- Razzano, M.
- Readhead, A.
- Reimer, A.
- Reimer, O.
- Reyes, L. C.
- Richards, J. L.
- Sbarra, C.
- Sgro, C.
- Siskind, E. J.
- Spandre, G.
- Spinelli, P.
- Szostek, A.
- Takahashi, H.
- Tanaka, T.
- Thayer, J. G.
- Thayer, J. B.
- Thompson, D. J.
- Tinivella, M.
- Torres, D. F.
- Tosti, G.
- Troja, E.
- Usher, T. L.
- Vandenbroucke, J ...
- Vasileiou, V.
- Vianello, G.
- Vitale, V.
- Waite, A. P.
- Winer, B. L.
- Wood, K. S.
- Yang, Zhaoyu
- Zimmer, Stephan
- Moderski, R.
- Nalewajko, K.
- Sikora, M.
- Villata, M.
- Raiteri, C. M.
- Aller, H. D.
- Aller, M. F.
- Arkharov, A. A.
- Benitez, E.
- Berdyugin, A.
- Blinov, D. A.
- Boettcher, M.
- Calle, O. J. A. ...
- Buemi, C. S.
- Carosati, D.
- Chen, W. P.
- Diltz, C.
- Di Paola, A.
- Dolci, M.
- Efimova, N. V.
- Forne, E.
- Gurwell, M. A.
- Heidt, J.
- Hiriart, D.
- Jordan, B.
- Kimeridze, G.
- Konstantinova, T ...
- Kopatskaya, E. N ...
- Koptelova, E.
- Kurtanidze, O. M ...
- Lahteenmaki, A.
- Larionova, E. G.
- Larionova, L. V.
- Larionov, V. M.
- Leto, P.
- Lindfors, E.
- Lin, H. C.
- Morozova, D. A.
- Nikolashvili, M. ...
- Nilsson, K.
- Oksman, M.
- Roustazadeh, P.
- Sievers, A.
- Sigua, L. A.
- Sillanpaa, A.
- Takahashi, T.
- Takalo, L. O.
- Tornikoski, M.
- Trigilio, C.
- Troitsky, I. S.
- Umana, G.
- Angelakis, E.
- Krichbaum, T. P.
- Nestoras, I.
- Riquelme, D.
- Krips, M.
- Trippe, S.
- Arai, A.
- Kawabata, K. S.
- Sakimoto, K.
- Sasada, M.
- Sato, S.
- Uemura, M.
- Yamanaka, M.
- Yoshida, M.
- Belloni, T.
- Tagliaferri, G.
- Bonning, E. W.
- Isler, J.
- Urry, C. M.
- Hoversten, E.
- Falcone, A.
- Pagani, C.
- Stroh, M.
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- NATURAL SCIENCES
- NATURAL SCIENCES
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