{"paper":{"title":"Confirmation of non-thermal hard X-ray excess in the Coma cluster from two epoch observations","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"3), 3) ((1) IASF/CNR Rome; (2) IASF/CNR Bologna; (3) IRA/CNR Bologna; (4) Astronomy Dept, Bologna Univ), Gabriele Giovannini (4, Giancarlo Setti (4, Gianfranco Brunetti (3), Luigina Feretti (3), Mauro Orlandini (2), Paola Grandi (2), Roberto Fusco-Femiano (1)","submitted_at":"2003-12-26T11:06:51Z","abstract_excerpt":"We report the hard X-ray spectrum of the Coma cluster obtained using the PDS data of two independent BeppoSAX observations performed with a time interval of about three years. In both the spectra a non thermal excess with respect to the thermal emission is present at a confidence level of ~ 3.4 sigma. The combined spectrum obtained by adding up the two spectra allows a measurement of the excess at the level of ~ 4.8 sigma at energies above 20 keV. The analysis of the full BeppoSAX data set provides a revised non-thermal X-ray flux which is slightly lower than that previously estimated (Fusco-F"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0312625","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}