SPI observations of positron annihilation radiation from the 4th galactic quadrant: sky distribution
Astrophysics
2007-05-23 v1
Abstract
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.
Cite
@article{arxiv.astro-ph/0406178,
title = {SPI observations of positron annihilation radiation from the 4th galactic quadrant: sky distribution},
author = {G. Weidenspointner and V. Lonjou and J. Knoedlseder and P. Jean and M. Allain and P. von Ballmoos and M. J. Harris and G. K. Skinner and G. Vedrenne and B. J. Teegarden and N. Gehrels and N. Guessoum and V. Schoenfelder and C. Chapuis and Ph. Durouchoux and E. Cisana and M. Valsesia},
journal= {arXiv preprint arXiv:astro-ph/0406178},
year = {2007}
}
Comments
4 pages, 2 figures, accepted for publication in the proceedings of the 5th INTEGRAL workshop