{"paper":{"title":"Implications of the radio and X-ray emission that followed GW170817","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Ehud Nakar, Tsvi Piran","submitted_at":"2018-01-29T19:14:52Z","abstract_excerpt":"The radio and X-rays that followed GW170817 increased gradually over $\\sim~100$ days, resembling the radio flare predicted to arise from the interaction of a binary neutron star merger outflow with the ISM \\citep{nakar2011}. Considering a blast wave moving with a Lorentz factor $\\Gamma$, we show that an off-axis observer, namely an observer at $\\theta_{obs}>1/\\Gamma$, sees a light curve rising faster than $F_\\nu\\propto t^3$. Therefore, the observed rise, $F_\\nu\\propto~t^{0.78}$, implies that at all times we have seen an on-axis emission. Namely, the emitting matter was within $\\theta_{obs}<1/\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.09712","kind":"arxiv","version":3},"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"}