SPI observations of positron annihilation radiation from the 4th galactic quadrant: Spectroscopy

Details SPI observations of positron annihilation radiation from the 4th galactic quadrant: Spectroscopy SPI observations of positron annihilation radiation from the 4th galactic quadrant: Spectroscopy

2004-11-15

arxiv.org/abs/astro-ph/0411414v1

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, accepted for publication in the proceedings of the 5th INTEGRAL Workshop (held in Munich, 2004)

Scientific paper

The status of the analysis of the electron/positron annihilation radiation performed by INTEGRAL/SPI in the 4th GALACTIC QUADRANT is reported. We use data from the first two Galactic Center Deep Exposures (GCDE) and from the Galactic Plane Scans (GPS). The analysis presented here is focused on the spectroscopic aspects of the electron/positron annihilation radiation. Background substraction and model fitting methods are described, and the parameters of the 511 keV line (flux, energy, and width) are deduced.

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