Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived from First-Year Fermi Large Area Telescope Data
| Title: | Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived from First-Year Fermi Large Area Telescope Data |
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| Authors: | Abdo AA; Ackermann M; Ajello M; Atwood WB; Baldini L; Ballet J; Barbiellini G; Bastieri D; Baughman BM; Bechtol K; Bellazzini R; Berenji B; Blandford RD; Bloom ED; Bonamente E; Borgland AW; Bregeon J; Brez A; Brigida M; Bruel P; Burnett TH; Buson S; Caliandro GA; Cameron RA; Caraveo PA; Casandjian JM; Cavazzuti E; Cecchi C; Celik O; Charles E; Chekhtman A; Cheung CC; Chiang J; Ciprini S; Claus R; Cohen Tanugi J; Cominsky LR; Conrad J; Cutini S; Dermer CD; de Angelis A; de Palma F; Digel SW; Di Bernardo G; Silva EDE; Drell PS; Drlica Wagner A; Dubois R; Dumora D; Farnier C; FAVUZZI, Cecilia; Fegan SJ; Focke WB; Fortin P; Frailis M; Fukazawa Y; Funk S; Fusco P; Gaggero D; Gargano F; Gasparrini D; Gehrels N; Germani S; Giebels B; GIGLIETTO, Nicola; Giommi P; Giordano F; Glanzman T; Godfrey G; Grenier IA; Grondin MH; Grove JE; Guillemot L; Guiriec S; Gustafsson M; Hanabata Y; Harding AK; Hayashida M; Hughes RE; Itoh R; Jackson MS; Johannesson G; Johnson AS; Johnson RP; Johnson TJ; Johnson WN; Kamae T; Katagiri H; Kataoka J; Kawai N; Kerr M; Knodlseder J; Kocian ML; Kuehn F; Kuss M; Lande J; Latronico L; Lemoine Goumard M; Longo F; Loparco F; Lott B; Lovellette MN; Lubrano P; Madejski GM; Makeev A; Mazziotta MN; McConville W; McEnery JE; Meurer C; Michelson PF; Mitthumsiri W; Mizuno T; Moiseev AA; Monte C; Monzani ME; Morselli A; Moskalenko IV; Murgia S; Nolan PL; Norris JP; Nuss E; Ohsugi T; Omodei N; Orlando E; Ormes JF; Paneque D; Panetta JH; Parent D; Pelassa V; Pepe M; Pesce Rollins M; Piron F; Porter TA; Raino S; Rando R; Razzano M; Reimer A; Reimer O; Reposeur T; Ritz S; Rochester LS; Rodriguez AY; Roth M; Ryde F; Sadrozinski HFW; Sanchez D; Sander A; Parkinson PMS; Scargle JD; Sellerholm A; Sgro C; Shaw MS; Siskind EJ; Smith DA; Smith PD; Spandre G; Spinelli P; Starck JL; Strickman MS; Strong AW; Suson DJ; Tajima H; Takahashi H; Takahashi T; Tanaka T; Thayer JB; Thayer JG; Thompson DJ; Tibaldo L; Torres DF; Tosti G; Tramacere A; Uchiyama Y; Usher TL; Vasileiou V; Vilchez N; Vitale V; Waite AP; Wang P; Winer BL; Wood KS; Ylinen T; Ziegler M. |
| Contributors: | Abdo, Aa; Ackermann, M; Ajello, M; Atwood, Wb; Baldini, L; Ballet, J; Barbiellini, G; Bastieri, D; Baughman, Bm; Bechtol, K; Bellazzini, R; Berenji, B; Blandford, Rd; Bloom, Ed; Bonamente, E; Borgland, Aw; Bregeon, J; Brez, A; Brigida, M; Bruel, P; Burnett, Th; Buson, S; Caliandro, Ga; Cameron, Ra; Caraveo, Pa; Casandjian, Jm; Cavazzuti, E; Cecchi, C; Celik, O; Charles, E; Chekhtman, A; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Cominsky, Lr; Conrad, J; Cutini, S; Dermer, Cd; de Angelis, A; de Palma, F; Digel, Sw; Di Bernardo, G; Silva, Ede; Drell, P; Drlica Wagner, A; Dubois, R; Dumora, D; Farnier, C; Favuzzi, Cecilia; Fegan, Sj; Focke, Wb; Fortin, P; Frailis, M; Fukazawa, Y; Funk, S; Fusco, P; Gaggero, D; Gargano, F; Gasparrini, D; Gehrels, N; Germani, S; Giebels, B; Giglietto, Nicola; Giommi, P; Giordano, F; Glanzman, T; Godfrey, G; Grenier, Ia; Grondin, Mh; Grove, Je; Guillemot, L; Guiriec, S; Gustafsson, M; Hanabata, Y; Harding, Ak; Hayashida, M; Hughes, Re; Itoh, R; Jackson, M; Johannesson, G; Johnson, A; Johnson, Rp; Johnson, Tj; Johnson, Wn; Kamae, T; Katagiri, H; Kataoka, J; Kawai, N; Kerr, M; Knodlseder, J; Kocian, Ml; Kuehn, F; Kuss, M; Lande, J; Latronico, L; Lemoine Goumard, M; Longo, F; Loparco, F |
| Publication Year: | 2010 |
| Collection: | Politecnico di Bari: Iris POLIBA (Catalogo dei prodotti della Ricerca) |
| Description: | We report on the first Fermi Large Area Telescope (LAT) measurements of the so-called "extra-galactic" diffuse gamma-ray emission (EGB). This component of the diffuse gamma-ray emission is generally considered to have an isotropic or nearly isotropic distribution on the sky with diverse contributions discussed in the literature. The derivation of the EGB is based on detailed modeling of the bright foreground diffuse Galactic gamma-ray emission, the detected LAT sources, and the solar gamma-ray emission. We find the spectrum of the EGB is consistent with a power law with a differential spectral index gamma = 2.41 +/- 0.05 and intensity I(>100 MeV) = (1.03 +/- 0.17) x 10(-5) cm(-2) s(-1) sr(-1), where the error is systematics dominated. Our EGB spectrum is featureless, less intense, and softer than that derived from EGRET data. |
| Document Type: | article in journal/newspaper |
| File Description: | STAMPA |
| Language: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000275543500007; volume:104; issue:10; numberofpages:7; journal:PHYSICAL REVIEW LETTERS; https://hdl.handle.net/11589/6187 |
| DOI: | 10.1103/PhysRevLett.104.101101 |
| Availability: | https://hdl.handle.net/11589/6187; https://doi.org/10.1103/PhysRevLett.104.101101 |
| Rights: | info:eu-repo/semantics/openAccess ; license:Tutti i diritti riservati |
| Accession Number: | edsbas.4742FA09 |
| Database: | BASE |