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THE FIRST FERMI MUL...
THE FIRST FERMI MULTIFREQUENCY CAMPAIGN ON BL LACERTAE : CHARACTERIZING THE LOW-ACTIVITY STATE OF THE EPONYMOUS BLAZAR
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Abdo, A. A. (author)
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Ackermann, M. (author)
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Ajello, M. (author)
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show more...
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Antolini, E. (author)
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Baldini, L. (author)
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Ballet, J. (author)
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Barbiellini, G. (author)
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Bastieri, D. (author)
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Bechtol, K. (author)
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Bellazzini, R. (author)
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Berenji, B. (author)
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Blandford, R. D. (author)
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Bonamente, E. (author)
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Borgland, A. W. (author)
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Bregeon, J. (author)
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Brez, A. (author)
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Brigida, M. (author)
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Bruel, P. (author)
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Buehler, R. (author)
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Buson, S. (author)
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Caliandro, G. A. (author)
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Cameron, R. A. (author)
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Cannon, A. (author)
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Caraveo, P. A. (author)
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Carrigan, S. (author)
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Casandjian, J. M. (author)
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Cecchi, C. (author)
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Celik, Oe (author)
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Charles, E. (author)
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Chekhtman, A. (author)
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Cheung, C. C. (author)
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Chiang, J. (author)
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Ciprini, S. (author)
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Claus, R. (author)
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Cohen-Tanugi, J. (author)
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- Conrad, Jan (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Costamante, L. (author)
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Cutini, S. (author)
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Dermer, C. D. (author)
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de Palma, F. (author)
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Donato, D. (author)
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do Couto e Silva, E. (author)
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Drell, P. S. (author)
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Dubois, R. (author)
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Escande, L. (author)
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Favuzzi, C. (author)
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Fegan, S. J. (author)
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Finke, J. (author)
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Focke, W. B. (author)
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Fortin, P. (author)
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Frailis, M. (author)
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Fukazawa, Y. (author)
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Funk, S. (author)
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Fusco, P. (author)
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Gargano, F. (author)
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Gasparrini, D. (author)
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Gehrels, N. (author)
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Germani, S. (author)
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Giglietto, N. (author)
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Giordano, F. (author)
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Giroletti, M. (author)
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Glanzman, T. (author)
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Godfrey, G. (author)
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Grenier, I. A. (author)
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Guiriec, S. (author)
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Hadasch, D. (author)
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Hayashida, M. (author)
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Hays, E. (author)
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Hughes, R. E. (author)
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Itoh, R. (author)
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Johannesson, G. (author)
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Johnson, A. S. (author)
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Johnson, W. N. (author)
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Kamae, T. (author)
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Katagiri, H. (author)
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Kataoka, J. (author)
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Knoedlseder, J. (author)
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Kuss, M. (author)
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Lande, J. (author)
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- Larsson, Stefan (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Latronico, L. (author)
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Lee, S. -H (author)
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- Garde, Maja Llena (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Longo, F. (author)
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Loparco, F. (author)
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Lott, B. (author)
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Lovellette, M. N. (author)
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Lubrano, P. (author)
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Makeev, A. (author)
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Mazziotta, M. N. (author)
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McEnery, J. E. (author)
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Mehault, J. (author)
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Michelson, P. F. (author)
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Mizuno, T. (author)
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Monte, C. (author)
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Monzani, M. E. (author)
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Morselli, A. (author)
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Moskalenko, I. V. (author)
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Murgia, S. (author)
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Nakamori, T. (author)
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Naumann-Godo, M. (author)
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Nishino, S. (author)
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Nolan, P. L. (author)
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Norris, J. P. (author)
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Nuss, E. (author)
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Ohsugi, T. (author)
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Okumura, A. (author)
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Omodei, N. (author)
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Orlando, E. (author)
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Ormes, J. F. (author)
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Ozaki, M. (author)
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Paneque, D. (author)
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Panetta, J. H. (author)
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Parent, D. (author)
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Pelassa, V. (author)
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Pepe, M. (author)
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Pesce-Rollins, M. (author)
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Piron, F. (author)
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Porter, T. A. (author)
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Raino, S. (author)
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Rando, R. (author)
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Razzano, M. (author)
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Reimer, A. (author)
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Reimer, O. (author)
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Ritz, S. (author)
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Roth, M. (author)
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Sadrozinski, H. F. -W (author)
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Sanchez, D. (author)
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Sander, A. (author)
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Schinzel, F. K. (author)
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Sgro, C. (author)
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Siskind, E. J. (author)
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Smith, P. D. (author)
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Sokolovsky, K. V. (author)
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Spandre, G. (author)
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Spinelli, P. (author)
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Strickman, M. S. (author)
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Suson, D. J. (author)
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Takahashi, H. (author)
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Tanaka, T. (author)
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Thayer, J. B. (author)
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Thayer, J. G. (author)
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Thompson, D. J. (author)
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Tibaldo, L. (author)
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Torres, D. F. (author)
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Tosti, G. (author)
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Tramacere, A. (author)
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Uehara, T. (author)
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Usher, T. L. (author)
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Vandenbroucke, J. (author)
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Vasileiou, V. (author)
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Vilchez, N. (author)
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Vitale, V. (author)
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Waite, A. P. (author)
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Wallace, E. (author)
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Wang, P. (author)
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Winer, B. L. (author)
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Wood, K. S. (author)
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SUBYang, Z. (author)
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- Ylinen, Tomi (author)
- KTH,Fysik
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Ziegler, M. (author)
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Berdyugin, A. (author)
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Boettcher, M. (author)
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Carraminana, A. (author)
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Carrasco, L. (author)
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de la Fuente, E. (author)
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Diltz, C. (author)
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Hovatta, T. (author)
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Kadenius, V. (author)
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Kovalev, Y. Y. (author)
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Lahteenmaki, A. (author)
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Lindfors, E. (author)
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Marscher, A. P. (author)
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Nilsson, K. (author)
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Pereira, D. (author)
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Reinthal, R. (author)
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Roustazadeh, P. (author)
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Savolainen, T. (author)
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Sillanpaa, A. (author)
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Takalo, L. O. (author)
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Tornikoski, M. (author)
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et al, et al (author)
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show less...
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(creator_code:org_t)
- 2011
- 2011
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 730:2, s. 101-
- Related links:
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https://urn.kb.se/re...
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show more...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
Close
- We report on observations of BL Lacertae during the first 18 months of Fermi LAT science operations and present results from a 48 day multifrequency coordinated campaign from 2008 August 19 to 2008 October 7. The radio to gamma-ray behavior of BL Lac is unveiled during a low-activity state thanks to the coordinated observations of radio-band (Metsahovi and VLBA), near-IR/optical (Tuorla, Steward, OAGH, and MDM), and X-ray (RXTE and Swift) observatories. No variability was resolved in gamma rays during the campaign, and the brightness level was 15 times lower than the level of the 1997 EGRET outburst. Moderate and uncorrelated variability has been detected in UV and X-rays. The X-ray spectrum is found to be concave, indicating the transition region between the low- and high-energy components of the spectral energy distribution (SED). VLBA observation detected a synchrotron spectrum self-absorption turnover in the innermost part of the radio jet appearing to be elongated and inhomogeneous, and constrained the average magnetic field there to be less than 3 G. Over the following months, BL Lac appeared variable in gamma rays, showing flares (in 2009 April and 2010 January). There is no evidence for the correlation of gamma rays with the optical flux monitored from the ground in 18 months. The SED may be described by a single-zone or a two-zone synchrotron self-Compton (SSC) model, but a hybrid SSC plus external radiation Compton model seems to be preferred based on the observed variability and the fact that it provides a fit closest to equipartition.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- BL Lacertae objects: general
- BL Lacertae objects: individual (BL Lacertae)
- galaxies: jets
- gamma rays: galaxies
- radiation mechanisms: non-thermal
- X-rays: galaxies
- Astronomy and astrophysics
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Abdo, A. A.
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Ackermann, M.
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Ajello, M.
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Antolini, E.
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Baldini, L.
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Ballet, J.
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show more...
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Barbiellini, G.
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Bastieri, D.
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Bechtol, K.
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Bellazzini, R.
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Berenji, B.
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Blandford, R. D.
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Bonamente, E.
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Borgland, A. W.
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Bregeon, J.
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Brez, A.
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Brigida, M.
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Bruel, P.
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Buehler, R.
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Buson, S.
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Caliandro, G. A.
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Cameron, R. A.
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Cannon, A.
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Caraveo, P. A.
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Carrigan, S.
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Casandjian, J. M ...
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Cecchi, C.
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Celik, Oe
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Charles, E.
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Chekhtman, A.
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Cheung, C. C.
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Chiang, J.
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Ciprini, S.
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Claus, R.
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Cohen-Tanugi, J.
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Conrad, Jan
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Costamante, L.
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Cutini, S.
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Dermer, C. D.
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de Palma, F.
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Donato, D.
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do Couto e Silva ...
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Drell, P. S.
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Dubois, R.
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Escande, L.
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Favuzzi, C.
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Fegan, S. J.
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Finke, J.
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Focke, W. B.
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Fortin, P.
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Frailis, M.
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Fukazawa, Y.
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Funk, S.
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Fusco, P.
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Gargano, F.
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Gasparrini, D.
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Gehrels, N.
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Germani, S.
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Giglietto, N.
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Giordano, F.
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Giroletti, M.
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Glanzman, T.
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Godfrey, G.
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Grenier, I. A.
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Guiriec, S.
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Hadasch, D.
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Hayashida, M.
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Hays, E.
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Hughes, R. E.
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Itoh, R.
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Johannesson, G.
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Johnson, A. S.
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Johnson, W. N.
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Kamae, T.
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Katagiri, H.
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Kataoka, J.
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Knoedlseder, J.
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Kuss, M.
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Lande, J.
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Larsson, Stefan
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Latronico, L.
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Lee, S. -H
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Garde, Maja Llen ...
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Longo, F.
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Loparco, F.
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Lott, B.
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Lovellette, M. N ...
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Lubrano, P.
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Makeev, A.
-
Mazziotta, M. N.
-
McEnery, J. E.
-
Mehault, J.
-
Michelson, P. F.
-
Mizuno, T.
-
Monte, C.
-
Monzani, M. E.
-
Morselli, A.
-
Moskalenko, I. V ...
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Murgia, S.
-
Nakamori, T.
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Naumann-Godo, M.
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Nishino, S.
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Nolan, P. L.
-
Norris, J. P.
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Nuss, E.
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Ohsugi, T.
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Okumura, A.
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Omodei, N.
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Orlando, E.
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Ormes, J. F.
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Ozaki, M.
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Paneque, D.
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Panetta, J. H.
-
Parent, D.
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Pelassa, V.
-
Pepe, M.
-
Pesce-Rollins, M ...
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Piron, F.
-
Porter, T. A.
-
Raino, S.
-
Rando, R.
-
Razzano, M.
-
Reimer, A.
-
Reimer, O.
-
Ritz, S.
-
Roth, M.
-
Sadrozinski, H. ...
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Sanchez, D.
-
Sander, A.
-
Schinzel, F. K.
-
Sgro, C.
-
Siskind, E. J.
-
Smith, P. D.
-
Sokolovsky, K. V ...
-
Spandre, G.
-
Spinelli, P.
-
Strickman, M. S.
-
Suson, D. J.
-
Takahashi, H.
-
Tanaka, T.
-
Thayer, J. B.
-
Thayer, J. G.
-
Thompson, D. J.
-
Tibaldo, L.
-
Torres, D. F.
-
Tosti, G.
-
Tramacere, A.
-
Uehara, T.
-
Usher, T. L.
-
Vandenbroucke, J ...
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Vasileiou, V.
-
Vilchez, N.
-
Vitale, V.
-
Waite, A. P.
-
Wallace, E.
-
Wang, P.
-
Winer, B. L.
-
Wood, K. S.
-
SUBYang, Z.
-
Ylinen, Tomi
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Ziegler, M.
-
Berdyugin, A.
-
Boettcher, M.
-
Carraminana, A.
-
Carrasco, L.
-
de la Fuente, E.
-
Diltz, C.
-
Hovatta, T.
-
Kadenius, V.
-
Kovalev, Y. Y.
-
Lahteenmaki, A.
-
Lindfors, E.
-
Marscher, A. P.
-
Nilsson, K.
-
Pereira, D.
-
Reinthal, R.
-
Roustazadeh, P.
-
Savolainen, T.
-
Sillanpaa, A.
-
Takalo, L. O.
-
Tornikoski, M.
-
et al, et al
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Stockholm University
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Royal Institute of Technology