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    Abdo, A A; Ajello, M; Atwood, W B; Bastieri, D; Baughman, B M; Berenji, B; Blandford, R D; Bonamente, E; Borgland, A W; Bregeon, J; Brez, A; Brigida, M; Burnett, T H; Caliandro, G A; Cameron, R A; Caraveo, P A; Charles, E; Cheung, C C; Chiang, J; Ciprini, S; Conrad, J; Dereli, H; de Palma, F; Digel, S W; Di Bernardo, G; Drell, P S; Dubois, R; Edmonds, Y; Farnier, C; Favuzzi, C; Fegan, S J; Focke, W B; Gaggero, D; Gargano, F; Germani, S; Giebels, B; Guillemot, L; Guiriec, S; Hanabata, Y; Jóhannesson, G; Johnson, A S; Johnson, T J; Kamae, T; Kataoka, J; Kerr, M; Knödlseder, J; Kocian, M L; Kuehn, F; Kuss, M; Lande, J; Loparco, F; Lott, B; Lovellette, M N; Madejski, G M; Makeev, A; Meurer, C; Michelson, P F; Moiseev, A A; Monte, C; Morselli, A; Moskalenko, I V; Murgia, S; Nolan, P L; Nuss, E; Omodei, N; Ormes, J F; Paneque, D; Pelassa, V; Pesce-Rollins, M; Rainò, S; Rando, R; Reimer, O; Rodriguez, A Y; Roth, M; Saz Parkinson, P M; Scargle, J D; Sgrò, C; Smith, D A; Spandre, G; Spinelli, P; Starck, J-L; Stecker, F W; Striani, E; Strong, A W; Tanaka, T; Thayer, J B; Thayer, J G; Thompson, D J; Tibaldo, L; Torres, D F; Tramacere, A; Uchiyama, Y; Usher, T L; Vilchez, N; Waite, A P; Wang, P; Winer, B L; Wood, K S; Ylinen, T; Ziegler, M

    Physical review letters, 12/2009, Volume: 103, Issue: 25
    Journal Article

    The diffuse galactic gamma-ray emission is produced by cosmic rays (CRs) interacting with the interstellar gas and radiation field. Measurements by the Energetic Gamma-Ray Experiment Telescope (EGRET) instrument on the Compton Gamma-Ray Observatory indicated excess gamma-ray emission greater, > or approximately equal to 1 GeV relative to diffuse galactic gamma-ray emission models consistent with directly measured CR spectra (the so-called "EGRET GeV excess"). The Large Area Telescope (LAT) instrument on the Fermi Gamma-Ray Space Telescope has measured the diffuse gamma-ray emission with improved sensitivity and resolution compared to EGRET. We report on LAT measurements for energies 100 MeV to 10 GeV and galactic latitudes 10 degrees < or = |b| < or = 20 degrees. The LAT spectrum for this region of the sky is well reproduced by a diffuse galactic gamma-ray emission model that is consistent with local CR spectra and inconsistent with the EGRET GeV excess.