Fermi gamma-ray space telescope observations of gamma-ray outbursts from 3C 454.3 in 2009 december and 2010 april
| Title: | Fermi gamma-ray space telescope observations of gamma-ray outbursts from 3C 454.3 in 2009 december and 2010 april |
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| Authors: | Ackermann M; Ajello M; Baldini L; Ballet J; Barbiellini G; Bastieri D; Bechtol K; Bellazzini R; Berenji B; Blandford RD; Bonamente E; Borgland AW; Bregeon J; Brigida M; Bruel P; Buehler R; Burnett TH; Buson S; Caliandro GA; Cameron RA; Caraveo PA; Carrigan S; Casandjian JM; Cavazzuti E; Cecchi C; Celik O; Chekhtman A; Cheung CC; Chiang J; Ciprini S; Claus R; Cohen Tanugi J; Corbel S; Cutini S; D'Ammando F; Dermer CD; de Angelis A; de Palma F; Digel SW; Silva EDE; Drell PS; Dubois R; Dumora D; Escande L; FAVUZZI, Cecilia; Fegan SJ; Ferrara EC; Fuhrmann L; Fukazawa Y; Fusco P; Gargano F; Gasparrini D; Gehrels N; Germani S; Giebels B; GIGLIETTO, Nicola; Giommi P; Giordano F; Giroletti M; Glanzman T; Godfrey G; Grenier IA; Grove JE; Guiriec S; Hadasch D; Hayashida M; Hays E; Johannesson G; Johnson AS; Johnson WN; Kamae T; Katagiri H; Kataoka J; Knodlseder J; Kuss M; Lande J; Larsson S; Latronico L; Lee SH; Garde ML; Longo F; Loparco F; Lott B; Lubrano P; Madejski GM; Makeev A; Marchili N; Mazziotta MN; McEnery JE; Mehault J; Michelson PF; Mizuno T; Monte C; Monzani ME; Morselli A; Moskalenko IV; Murgia S; Nakamori T; Nalewajko K; Naumann Godo M; Nolan PL; Norris JP; Nuss E; Ohsugi T; Okumura A; Omodei N; Orlando E; Ormes JF; Pelassa V; Pepe M; Pesce Rollins M; Piron F; Porter TA; Raino S; Rando R; Razzano M; Reimer A; Reimer O; Reyes LC; Ripken J; Ritz S; Roth M; Sadrozinski HFW; Sanchez D; Sander A; Scargle JD; Sgro C; Sikora M; Siskind EJ; Spandre G; Spinelli P; Strickman MS; Suson DJ; Takahashi H; Takahashi T; Tanaka T; Tanaka Y; Thayer JB; Thayer JG; Thompson DJ; Tibaldo L; Torres DF; Tosti G; Tramacere A; Usher TL; Vandenbroucke J; Vilchez N; Vitale V; Waite AP; Wang P; Wehrle AE; Winer BL; Yang Z; Ylinen T; Ziegler M. |
| Contributors: | Ackermann, M; Ajello, M; Baldini, L; Ballet, J; Barbiellini, G; Bastieri, D; Bechtol, K; Bellazzini, R; Berenji, B; Blandford, Rd; Bonamente, E; Borgland, Aw; Bregeon, J; Brigida, M; Bruel, P; Buehler, R; Burnett, Th; Buson, S; Caliandro, Ga; Cameron, Ra; Caraveo, Pa; Carrigan, S; Casandjian, Jm; Cavazzuti, E; Cecchi, C; Celik, O; Chekhtman, A; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Corbel, S; Cutini, S; D'Ammando, F; Dermer, Cd; de Angelis, A; de Palma, F; Digel, Sw; Silva, Ede; Drell, P; Dubois, R; Dumora, D; Escande, L; Favuzzi, Cecilia; Fegan, Sj; Ferrara, Ec; Fuhrmann, L; Fukazawa, Y; Fusco, P; Gargano, F; Gasparrini, D; Gehrels, N; Germani, S; Giebels, B; Giglietto, Nicola; Giommi, P; Giordano, F; Giroletti, M; Glanzman, T; Godfrey, G; Grenier, Ia; Grove, Je; Guiriec, S; Hadasch, D; Hayashida, M; Hays, E; Johannesson, G; Johnson, A; Johnson, Wn; Kamae, T; Katagiri, H; Kataoka, J; Knodlseder, J; Kuss, M; Lande, J; Larsson, S; Latronico, L; Lee, Sh; Garde, Ml; Longo, F; Loparco, F; Lott, B; Lubrano, P; Madejski, Gm; Makeev, A; Marchili, N; Mazziotta, Mn; Mcenery, Je; Mehault, J; Michelson, Pf; Mizuno, T; Monte, C; Monzani, Me; Morselli, A; Moskalenko, Iv; Murgia, S; Nakamori, T; Nalewajko, K; Naumann Godo, M |
| Publication Year: | 2010 |
| Collection: | Politecnico di Bari: Iris POLIBA (Catalogo dei prodotti della Ricerca) |
| Subject Terms: | Galaxies: active; Gamma rays: galaxies; Quasars: individual (3C 454.3) |
| Description: | The flat spectrum radio quasar 3C 454.3 underwent an extraordinary outburst in 2009 December when it became the brightest gamma-ray source in the sky for over 1 week. Its daily flux measured with the Fermi-Large Area Telescope at photon energiesE > 100 MeV reached F(100) = 22 +/- 1 x 10(6) photon cm(-2) s(-1), representing the highest daily flux of any blazar ever recorded in high-energy. -rays. It again became the brightest source in the sky in 2010 April, triggering a pointed-mode observation by Fermi. The correlated. -ray temporal and spectral properties during these exceptional events are presented and discussed. The main results show flux variability over time scales less than 3 hr and very mild spectral variability with an indication of gradual hardening preceding major flares. The light curves during periods of enhanced activity in 2008 July-August and 2010 December show strong resemblance, with a flux plateau of a few days preceding the major flare. No consistent loop pattern emerged in the. -ray spectral index versus the flux plane as would be expected in acceleration and cooling scenarios. The maximum energy of a photon from 3C 454.3 is approximate to 20 GeV and a minimum Doppler factor of approximate to 13 is derived. The gamma-ray spectrum of 3C 454.3 shows a significant spectral break between approximate to 2 and 3 GeV that is very weakly dependent on the flux state, even when the flux changes by an order of magnitude. |
| Document Type: | article in journal/newspaper |
| File Description: | ELETTRONICO |
| Language: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000282193600036; volume:721; issue:2; firstpage:1383; lastpage:1396; numberofpages:14; journal:THE ASTROPHYSICAL JOURNAL; https://hdl.handle.net/11589/183 |
| DOI: | 10.1088/0004-637X/721/2/1383 |
| Availability: | https://hdl.handle.net/11589/183; https://doi.org/10.1088/0004-637X/721/2/1383 |
| Rights: | info:eu-repo/semantics/openAccess ; license:Tutti i diritti riservati |
| Accession Number: | edsbas.BC0072BB |
| Database: | BASE |