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- Ackermann, M. (author)
MULTI-WAVELENGTH OBSERVATIONS OF BLAZAR AO 0235+164 IN THE 2008-2009 FLARING STATE
- Article/chapterEnglish2012
Publisher, publication year, extent ...
- 2012
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:su-162405
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-162405URI
- https://doi.org/10.1088/0004-637X/751/2/159DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- 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 and genre
- NATURVETENSKAP Fysik hsv//swe
- NATURAL SCIENCES Physical Sciences hsv//eng
- BL Lacertae objects: individual (AO 0235+164)
- galaxies: active
- galaxies: jets
- gamma rays: galaxies
- radiation mechanisms: non-thermal
Added entries (persons, corporate bodies, meetings, titles ...)
- Ajello, M. (author)
- Ballet, J. (author)
- 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)
- Larsson, StefanStockholms universitet,Fysikum,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)slars (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)
- Yang, ZhaoyuStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)zhaoyu (author)
- Zimmer, StephanStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)stzi0820 (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)
- Stockholms universitetFysikum (creator_code:org_t)
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- In:Astrophysical Journal751:20004-637X1538-4357
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