OSSE search for high-energy X-ray emission from the Coma Cluster

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Comets, Cosmology, Fluxes, Galactic Clusters, Intergalactic Media, Magnetic Fields, Nonthermal Radiation, Photons, X Rays, Background Noise, Confidence Limits, Gamma Ray Observatory, Onboard Equipment, Subtraction, X Ray Detectors

Scientific paper

Nonthermal emission of high-energy X-rays from the Coma Cluster is predicted from the presence of diffuse intracluster radio synchrotron emission. We have observed the Coma Cluster with the OSSE experiment, onboard the Compton Gamma-Ray Observatory, for a total on-source time of 4.4 days. No significant emission was detected. The flux upper limit, combined with the known radio flux, leads to a lower limit of approximately 1 x 10-7 G on the mean intracluster magnetic field in the central region of the Coma CLuster.

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