{"paper":{"title":"Measuring the Coronal Properties of IC4329A with NuSTAR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A.C. Fabian (IoA Cambridge), A. Marinucci (Uni-Roma Tre), B.W. Grefenstette (Caltech), C.J. Hailey (Columbia), D.J. Walton (Caltech), D.R. Ballantyne (Georgia Tech), D. Stern (NASA/JPL), E. Rivers (Caltech), F.A. Harrison (Caltech), F.E. Christensen (SNSI Denmark), F. Fuerst (Caltech), G. Madejski (Stanford), G. Matt (Uni-Roma Tre), K.K. Madsen (Caltech), L.W. Brenneman (CfA), M. Elvis (CfA), S.E. Boggs (Berkeley), W.W. Craig (SNSI Denmark/LLNL), W.W. Zhang (NASA/GSFC)","submitted_at":"2013-12-12T17:40:01Z","abstract_excerpt":"We present an analysis of a ~160 ks NuSTAR observation of the nearby bright Seyfert galaxy IC4329A. The high-quality broadband spectrum enables us to separate the effects of distant reflection from the direct coronal continuum, and to therefore accurately measure the high-energy cutoff to be $E_{cut}=178^{+74}_{-40}$ keV. The coronal emission arises from accretion disk photons Compton up-scattered by a thermal plasma, with the spectral index and cutoff being due to a combination of the finite plasma temperature and optical depth. Applying standard Comptonization models, we measure both physica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.3563","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"}