INTEGRAL/IBIS search for e-e+ annihilation radiation from the Galactic Center Region

Abstract

Electron-positron annihilation radiation from the Galactic Center region has been detected since the seventies, but its astrophysical origin is still a topic of a scientific debate. We have analyzed data of the gamma-ray imager IBIS/ISGRI onboard of ESA's INTEGRAL platform in the e${}^{-}$e${}^{+}$ line. During the first year of the missions Galactic Center Deep Exposure no evidence for point sources at 511 keV has been found in the ISGRI data; the $2\sigma$ upper limit for resolved single point sources is estimated to be $1.6\times 10^{-4}phc{m}^{-2}{s}^{-1}$.

arXiv comment6 pages, 3 figures; Cospar 2004. To be published in: Advances in Space Research

References in corpus (5)

• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• MeV Dark Matter: Has It Been Detected?
• The INTEGRAL Science Data Centre (ISDC)
• The INTEGRAL/IBIS Scientific Data Analysis
• SPI observations of positron annihilation radiation from the 4th galactic quadrant: sky distribution

Cited by in corpus (7)

• On the morphology of the electron-positron annihilation emission as seen by SPI/INTEGRAL
• Unveiling the high energy tail of 1E 1740.7-2942 with INTEGRAL
• On the Origin of the 511 keV Emission in the Galactic Centre
• Hunting for Dark Matter and New Physics with GECCO
• Electron-positron pair production near the Galactic Centre and the 511 keV emission line
• Exploring the MeV Sky with a Combined Coded Mask and Compton Telescope: The Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO)
• Electron-positron Annihilation Lines and Decaying Sterile Neutrinos