{"paper":{"title":"Spatially resolved X-ray spectra of NGC 4258","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. S. Wilson, B. Li, C. S. Reynolds, Y. Yang","submitted_at":"2007-01-19T19:36:23Z","abstract_excerpt":"We report a spatially resolved, X-ray spectral analysis of NGC 4258 using archival {\\it Chandra} and {\\it XMM-Newton} observations. The {\\it XMM-Newton} spectra of the nuclear region are well described by two power-law components, a soft (0.57 keV) thermal component, and an Fe K$\\alpha$ line with EW = 40 $\\pm$ 33 eV. The properties of the second, weaker power-law component are similar to those of an off-nuclear source $2.5\\arcsec$ SW of the nucleus. The spectrum of the extended emission of the entire galaxy is well described by two thermal components (MEKAL) models with temperatures $\\simeq 0."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0701569","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"}