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dc.contributor.authorReis, R. C.
dc.contributor.authorFabian, Andrew C.
dc.contributor.authorReynolds, C. S.
dc.contributor.authorBrenneman, Laura W.
dc.contributor.authorWalton, D. J.
dc.contributor.authorTrippe, M.
dc.contributor.authorMiller, J. M.
dc.contributor.authorMushotzky, Richard F.
dc.contributor.authorNowak, Michael A.
dc.date.accessioned2015-02-20T18:37:04Z
dc.date.available2015-02-20T18:37:04Z
dc.date.issued2012-01
dc.date.submitted2011-06
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://hdl.handle.net/1721.1/95459
dc.description.abstractNGC 3783 was observed for approximately 210 ks by Suzaku and in this time showed significant spectral and flux variability at both short (20 ks) and long (100 ks) timescales. The full observation is found to consist of approximately six "spectral periods" where the behavior of the soft (0.3-1.0 keV) and hard (2-10 keV) bands are somewhat distinct. Using a variety of methods we find that the strong warm absorber present in this source does not change on these timescales, confirming that the broadband variability is intrinsic to the central source. The time-resolved difference-spectra are well modeled with an absorbed power law below 10 keV, but show an additional hard excess at ≈20 keV in the latter stages of the observation. This suggests that, in addition to the variable power law, there is a further variable component that varies with time but not monotonically with flux. We show that a likely interpretation is that this further component is associated with variations in the reflection fraction or possibly ionization state of the accretion disk a few gravitational radii from the black hole.en_US
dc.language.isoen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-637x/745/1/93en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Astronomical Societyen_US
dc.titleX-RAY SPECTRAL VARIABILITY IN NGC 3783en_US
dc.typeArticleen_US
dc.identifier.citationReis, R. C., A. C. Fabian, C. S. Reynolds, L. W. Brenneman, D. J. Walton, M. Trippe, J. M. Miller, R. F. Mushotzky, and M. A. Nowak. “X-RAY SPECTRAL VARIABILITY IN NGC 3783.” The Astrophysical Journal 745, no. 1 (January 3, 2012): 93. © 2012 The American Astronomical Societyen_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.mitauthorNowak, Michael A.en_US
dc.relation.journalThe Astrophysical Journalen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsReis, R. C.; Fabian, A. C.; Reynolds, C. S.; Brenneman, L. W.; Walton, D. J.; Trippe, M.; Miller, J. M.; Mushotzky, R. F.; Nowak, M. A.en_US
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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