{"paper":{"title":"Discovery of a new extragalactic source population of energetic particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Anthony M. Brown, Celine B{\\oe}hm, Jamie Graham, Joe Silk, Paula Chadwick, Thomas Lacroix","submitted_at":"2016-03-17T13:12:43Z","abstract_excerpt":"We report the discovery of a statistically significant hardening in the Fermi-LAT $\\gamma$-ray spectrum of Centaurus A's core, with the spectral index hardening from $\\Gamma_{1}=2.73 \\pm 0.02$ to $\\Gamma_{1}=2.29 \\pm 0.07$ at a break energy of ($2.6 \\pm 0.3$) GeV. Using a likelihood analysis, we find no evidence for flux variability in Cen A's core lightcurve above or below the spectral break when considering the entire 8 year period. Interestingly, however, the first $\\sim3.5$ years of the low energy lightcurve shows evidence of flux variability at the $\\sim3.5 \\sigma$ confidence level. To un"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.05469","kind":"arxiv","version":4},"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"}