An Overview of Gamma-Ray Line Results from the INTEGRAL Spectrometer (SPI)

Details An Overview of Gamma-Ray Line Results from the INTEGRAL Spectrometer (SPI) An Overview of Gamma-Ray Line Results from the INTEGRAL Spectrometer (SPI)

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.2402t&link_type=abstract

American Astronomical Society, HEAD meeting #8, #24.02; Bulletin of the American Astronomical Society, Vol. 36, p.949

Astronomy and Astrophysics

Astronomy

Scientific paper

The Spectrometer (SPI) on the ESA INTEGRAL mission is a cooled-germanium coded-aperture telescope designed to perform high-resolution gamma-ray spectroscopy in the 20-8000 keV range. The search for and study of gamma-ray line emission was one of the principal scientific justifications for the INTEGRAL mission. The INTEGRAL Core Program includes a deep exposure of the central radian of our Galaxy, a known source of gamma-ray line emission. In addition a large fraction (typically 50 Program observations are within or close to the Galactic Plane. This observing program combined with the broad ( 25 deg) field-of-view of the Spectrometer will produce an unprecedented depth of coverage for the study of Galactic gamma-ray lines. In this paper we will present a broad overview of the first 1 1/2 yr of observations including results and limits from electron-positron annihilation and from the decay of 26Al, 44Ti, 60Fe and 22Na. More detailed expositions of the electron-positron annihilation and 60Fe line observations will be given in companion talks by Weidenspointner et al. and Harris et al.

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