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20 diffuse catalogue fans I. A. Grenier CEA Saclay S. W. Digel Stanford Linear Accelerator Center

Gamma-ray Large Area Space Telescope. 20 diffuse catalogue fans I. A. Grenier CEA Saclay S. W. Digel Stanford Linear Accelerator Center. source detection. detection pipeline (using likelihood tool) ready for DC2 discussion on how to combine detection results in different energy bands

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20 diffuse catalogue fans I. A. Grenier CEA Saclay S. W. Digel Stanford Linear Accelerator Center

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  1. Gamma-ray Large Area Space Telescope 20 diffuse catalogue fans I. A. Grenier CEA Saclay S. W. Digel Stanford Linear Accelerator Center

  2. source detection • detection pipeline (using likelihood tool) ready for DC2 • discussion on how to combine detection results in different energy bands • discussion on the strategy for optimizing the diffuse emission together with the sources • discussion on the choice of « real » vs. « highest TS » position for the source characterization step for firmly identified sources • position systematic uncertainties and creating false additional sources

  3. ISM emission model • great progress on • ISM maps (new HI and CO rings, dark hydrogen off the plane • ISRF (new  data and modelling) • radiation processes (pion-decay, IC) … brem to be checked • large effort on GALPROP •  data fitting (X to ) •  data display (GALPLOT) • revisit the whole suite of programs (C++) • output cube for Science tools • 1st year outstanding prospects (confluence discussions) • any GeV excess? • interstellar spectrum beyond 10 GeV • cosmic-ray arm/interarm contrast in the outer Galaxy • extragalactic background • X ratios: X(R), locally, in LMC and SMC

  4. multi-wavelength support • medium and high latitude CO coverage of faint clouds (potential LAT sources) • northern sky: Mini (CfA) (work in progress to solve the funding issue) • southern sky: NANTEN (discussion ahead) • at low latitude • rare CO isotope or high-J CO mapping toward spiral arm tangents and molecular ring • higher density tracers (HCN, CS,…) maps around Gal. Center

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