The BL Lacertae object 3C 66A was detected in a flaring state by the Fermi Large Area Telescope (LAT) and VERITAS in 2008 October. In addition to these gamma-ray observations, F-GAMMA, GASP-WEBT, PAIRITEL, MDM, ATOM, Swift, and Chandra provided radio to X-ray coverage. The available light curves show variability and, in particular, correlated flares are observed in the optical and Fermi-LAT gamma-ray band. The resulting spectral energy distribution can be well fitted using standard leptonic models with and without an external radiation field for inverse Compton scattering. It is found, however, that only the model with an external radiation field can accommodate the intra-night variability observed at optical wavelengths.

MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING GAMMA-RAY BLAZAR 3C 66A IN 2008 OCTOBER

BALDINI, LUCA;RAZZANO, MASSIMILIANO;
2011

Abstract

The BL Lacertae object 3C 66A was detected in a flaring state by the Fermi Large Area Telescope (LAT) and VERITAS in 2008 October. In addition to these gamma-ray observations, F-GAMMA, GASP-WEBT, PAIRITEL, MDM, ATOM, Swift, and Chandra provided radio to X-ray coverage. The available light curves show variability and, in particular, correlated flares are observed in the optical and Fermi-LAT gamma-ray band. The resulting spectral energy distribution can be well fitted using standard leptonic models with and without an external radiation field for inverse Compton scattering. It is found, however, that only the model with an external radiation field can accommodate the intra-night variability observed at optical wavelengths.
Abdo, Aa; Ackermann, M; Ajello, M; Baldini, Luca; Ballet, J; Barbiellini, G; Bastieri, D; Bechtol, K; Bellazzini, R; Berenji, B; Blandford, Rd; Bonamente, E; Borgland, Aw; Bouvier, A; Bregeon, J; Brez, A; Brigida, M; Bruel, P; Buehler, R; Buson, S; Caliandro, Ga; Cameron, Ra; Caraveo, Pa; Carrigan, S; Casandjian, Jm; Cavazzuti, E; Cecchi, C; Celik, O; Charles, E; Chekhtman, A; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Conrad, J; Costamante, L; Cutini, S; Davis, Ds; Dermer, Cd; de Palma, F; Digel, Sw; Silva, Ede; Drell, Ps; Dubois, R; Dumora, D; Favuzzi, C; Fegan, Sj; Fortin, P; Frailis, M; Fuhrmann, L; Fukazawa, Y; Funk, S; Fusco, P; Giroletti, M; Glanzman, T; Godfrey, G; Grenier, Ia; Grove, Je; Guillemot, L; Guiriec, S; Hadasch, D; Hayashida, M; Hays, E; Horan, D; Hughes, Re; Itoh, R; Johannesson, G; Johnson, As; Johnson, Tj; Johnson, Wn; Kamae, T; Katagiri, H; Kataoka, J; Knodlseder, J; Kuss, M; Lande, J; Latronico, L; Lee, Sh; Longo, F; Loparco, F; Lott, B; Lovellette, Mn; Lubrano, P; Makeev, A; Mazziotta, Mn; Mcenery, Je; Mehault, J; Michelson, Pf; Mizuno, T; Moiseev, Aa; Monte, C; Monzani, Me; Morselli, A; Moskalenko, Iv; Murgia, S; Nakamori, T; Naumann Godo, M; Nestoras, I; Nolan, Pl; Norris, Jp; Nuss, E; Ohsugi, T; Okumura, A; Omodei, N; Orlando, E; Ormes, Jf; Ozaki, M; Paneque, D; Panetta, Jh; Parent, D; Pelassa, V; Pepe, M; Pesce Rollins, M; Piron, F; Porter, Ta; Raino, S; Rando, R; Razzano, Massimiliano; Reimer, A; Reimer, O; Reyes, Lc; Ripken, J; Ritz, S; Romani, Rw; Roth, M; Sadrozinski, Hfw; Sanchez, D; Sander, A; Scargle, Jd; Sgro, C; Shaw, Ms; Smith, Pd; Spandre, G; Spinelli, P; Strickman, Ms; Suson, Dj; Takahashi, H; Tanaka, T; Thayer, Jb; Thayer, Jg; Thompson, Dj; Tibaldo, L; Torres, Df; Tosti, G; Tramacere, A; Usher, Tl; Vandenbroucke, J; Vasileiou, V; Vilchez, N; Vitale, V; Waite, Ap; Wang, P; Winer, Bl; Wood, Ks; Yang, Z; Ylinen, T; Ziegler, M; Acciari, Va; Aliu, E; Arlen, T; Aune, T; Beilicke, M; Benbow, W; Bottcher, M; Boltuch, D; Bradbury, Sm; Buckley, Jh; Bugaev, V; Byrum, K; Cannon, A; Cesarini, A; Christiansen, Jl; Ciupik, L; Cui, W; Perez, Id; Dickherber, R; Errando, M; Falcone, A; Finley, Jp; Finnegan, G; Fortson, L; Furniss, A; Galante, N; Gall, D; Gillanders, Gh; Godambe, S; Grube, J; Guenette, R; Gyuk, G; Hanna, D; Holder, J; Hui, Cm; Humensky, Tb; Imran, A; Kaaret, P; Karlsson, N; Kertzman, M; Kieda, D; Konopelko, A; Krawczynski, H; Krennrich, F; Lang, Mj; Lebohec, S; Maier, G; Mcarthur, S; Mccann, A; Mccutcheon, M; Moriarty, P; Mukherjee, R; Ong, Ra; Otte, An; Pandel, D; Perkins, Js; Pichel, A; Pohl, M; Quinn, J; Ragan, K; Reynolds, Pt; Roache, E; Rose, Hj; Schroedter, M; Sembroski, Gh; Senturk, Gd; Smith, Aw; Steele, D; Swordy, Sp; Tesic, G; Theiling, M; Thibadeau, S; Varlotta, A; Vassiliev, Vv; Vincent, S; Wakely, Sp; Ward, Je; Weekes, Tc; Weinstein, A; Weisgarber, T; Williams, Da; Wissel, S; Wood, M; Villata, M; Raiteri, Cm; Gurwell, Ma; Larionov, Vm; Kurtanidze, Om; Aller, Mf; Lahteenmaki, A; Chen, Wp; Berduygin, A; Agudo, I; Aller, Hd; Arkharov, Aa; Bach, U; Bachev, R; Beltrame, P; Benitez, E; Buemi, Cs; Dashti, J; Calcidese, P; Capezzali, D; Carosati, D; Da Rio, D; Di Paola, A; Diltz, C; Dolci, M; Dultzin, D; Forne, E; Gomez, Jl; Hagen Thorn, Va; Halkola, A; Heidt, J; Hiriart, D; Hovatta, T; Hsiao, Hy; Jorstad, Sg; Kimeridze, Gn; Konstantinova, Ts; Kopatskaya, En; Koptelova, E; Leto, P; Ligustri, R; Lindfors, E; Lopez, Jm; Marscher, Ap; Mommert, M; Mujica, R; Nikolashvili, Mg; Nilsson, K; Palma, N; Pasanen, M; Roca Sogorb, M; Mommert, M; Mujica, R; Nikolashvili, Mg; Nilsson, K; Palma, N; Pasanen, M; Roca Sogorb, M; Ros, Ja; Roustazadeh, P; Sadun, Ac; Saino, J; Sigua, La; Sillanaa, A; Sorcia, M; Takalo, Lo; Tornikoski, M; Trigilio, C; Turchetti, R; Umana, G; Belloni, T; Blake, Ch; Bloom, Js; Angelakis, E; Fumagalli, M; Hauser, M; Prochaska, Jx; Riquelme, D; Sievers, A; Starr, Dl; Tagliaferri, G; Ungerechts, H; Wagner, S; Zensus, Ja
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/188815
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 54
  • ???jsp.display-item.citation.isi??? 58
social impact