{"paper":{"title":"Discovery of a keV-X-ray Excess in RX J1856.5--3754","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Hiroshi Nakajima, Hiroshi Tsunemi, Kiyoshi Hayashida, Shota Inoue, Tomokage Yoneyama","submitted_at":"2017-03-17T12:56:25Z","abstract_excerpt":"RX J1856.5$-$3754 is the brightest and nearest ($\\sim 120$ pc) source among thermally emitting isolated neutron stars. Its spectra observed with {\\sl XMM-Newton} and {\\sl Chandra} satellites are well-fitted with the two-temperature ($kT^\\infty \\sim$ 32 and 63 eV) blackbody model. Fitting ten sets of the data from {\\sl Suzaku} XIS0, XIS1, XIS3 and {\\sl XMM-Newton} EPIC-pn with the two-temperature blackbody model, we discover an excess emission, 16--26\\% in 0.8--1.2\\,keV. We examine possible causes of this keV-X-ray excess; uncertainty in the background, pile up of the low energy photons and con"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.05995","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"}