Journal
ASTRONOMY & ASTROPHYSICS
Volume 453, Issue 1, Pages L5-L8Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20065157
Keywords
galaxies : clusters : Coma Cluster; methods : data analysis; gamma rays : observations; X-rays : galaxies : clusters
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Aims. We report the INTEGRAL/IBIS observations of the Coma Cluster in the hard X-ray/soft gamma-ray domain. Methods. Since the Coma Cluster appears as an extended source, its global intensity and significance cannot be directly extracted with standard coded mask analysis. We used the method of imaging the extended sources with a coded mask telescope developed by Renaud et al. (2006). Results. The imaging capabilities and the sensitivity of the IBIS/ISGRI coded mask instrument allows us to identify for the first time the site of the emission above similar to 15 keV. We have studied the Coma Cluster morphology in the 18-30 keV band and found that it follows the prediction based on X-ray observations. We also bring constraints on the non-thermal mechanism contribution at higher energies.
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