{"paper":{"title":"The X-ray Spectral Variability of the Seyfert Galaxy NGC 3227","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.Ptak, H.Netzer, I.M.George, K.Nandra, R.F.Mushotzky, T.J.Turner, T.Yaqoob","submitted_at":"1998-06-30T16:09:52Z","abstract_excerpt":"(Abridged) We present the results from {\\it ASCA} observations of NGC 3227 along with those from a {\\it ROSAT} observation. The 0.6--10 keV continuum is consistent with a powerlaw with $\\Gamma \\sim 1.6$, flatter than that typically observed in Seyfert galaxies. Fe $K$-shell emission is observed with an EW and profile typical of Seyfert 1 galaxies. The {\\it ASCA} observations in 1993 reveal absorption by a screen $N_{H,z}^{ion} \\simeq 3\\times10^{21}  cm^{-2}}$ of ionized material with $U_X \\simeq 0.01$. Joint analysis of the {\\it ASCA} and {\\it ROSAT} data show an additional screen of neutral m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9806392","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"}