Please use this identifier to cite or link to this item: http://hdl.handle.net/2307/286
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dc.contributor.authorMatt, Giorgio-
dc.contributor.authorBianchi, Stefano-
dc.contributor.authorAwaki, Hisamitsu-
dc.contributor.authorComastri, Andrea-
dc.contributor.authorGuainazzi, Matteo-
dc.contributor.authorIwasawa, Kazushi-
dc.contributor.authorJimenez-Bailon, Elena-
dc.contributor.authorNicastro, Fabrizio-
dc.date.accessioned2010-07-09T10:22:59Z-
dc.date.available2010-07-09T10:22:59Z-
dc.date.issued2009-03-
dc.identifier.issn0004-6361-
dc.identifier.urihttp://hdl.handle.net/2307/286-
dc.description.abstractContext. In recent years, several Seyfert 2 galaxies have beendiscovered that change state when observed in X-rays a few years apart,switching from Compton-thin to reflection-dominated or viceversa.Aims. We observed a member of this class of "Changing-look" sources,the Phoenix galaxy, with Suzaku, with the aim of better understandingthe nature of the variations.Methods. The Suzaku spectrum was analyzed, and the results comparedwith previous ASCA and XMM-Newton observations.Results. The source was caught in a Compton-thin state, as inXMM-Newton, but differently from ASCA. Comparing the Suzaku andXMM-Newton observations, a variation in the column density of theabsorber on a time scale of years is discovered. A similar change, buton much shorter time scales (i.e. ks) may also explain the count-ratevariations during the Suzaku observations. A soft excess is alsopresent, likely due to continuum and line emission from photoionizedcircumnuclear matter.en
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.relation.ispartofAstronomy & Astrophysicsen
dc.subjectX-RAY-EMISSIONen
dc.subjectACTIVE GALACTIC NUCLEIen
dc.subjectSEYFERT 2 GALAXIESen
dc.subjectK-ALPHAen
dc.subjectLINEen
dc.subjectOBSCURED AGNen
dc.subjectCOMPTON SHOULDERen
dc.subjectXMM-NEWTONen
dc.subjectIRONen
dc.subjectABUNDANCESen
dc.subjectSPECTRUMen
dc.titleSuzaku observation of the Phoenix galaxyen
dc.typeArticleen
dc.subject.miurSettori Disciplinari MIUR::Scienze fisiche::ASTRONOMIA E ASTROFISICAen
dc.subject.miurScienze fisiche-
dc.subject.isicruiCategorie ISI-CRUI::Scienze fisiche::Physicsen
dc.subject.isicruiScienze fisiche-
dc.subject.anagraferoma3Scienze fisicheen
dc.relation.volumenumber496en
dc.relation.pagenumber653-658en
dc.identifier.doi10.1051/0004-6361/200811049-
dc.relation.issuenumber3en
dc.description.romatrecurrentDipartimento di Fisica 'Edoardo Amaldi'*
item.fulltextWith Fulltext-
item.grantfulltextopen-
item.languageiso639-1other-
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X_Dipartimento di Fisica 'Edoardo Amaldi'
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