2004/06/07 by G. Weidenspointner, Weidenspointner, G., V. Lonjou +36
Engineering · Physics and Astronomy · #Astrophysics (astro-ph) #Atomic and Molecular Physics #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Photocathodes and Microchannel Plates #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0406178
4 pages, 2 figures, accepted for publication in the proceedings of the 5th INTEGRAL workshop
arxiv created 2004/06/07 · openalex publication_date 2004/06/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
During its first year in orbit the INTEGRAL observatory performed deep exposures of the Galactic Center region and scanning observations of the Galactic plane. We report on the status of our analysis of the positron annihilation radiation from the 4th Galactic quadrant with the spectrometer SPI, focusing on the sky distribution of the 511 keV line emission. The analysis methods are described; current constraints and limits on the Galactic bulge emission and the bulge-to-disk ratio are presented.