XMM-Newton observations of the narrow-line Seyfert 1 galaxy Mrk 335 in a historical low X-ray flux state

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dc.creator Gallo, Luigi C.
dc.creator Grupe, Dirk
dc.creator Komossa, Stefanie
dc.creator Fabian, Andrew C.
dc.creator Larsson, Josefin
dc.creator Pradhan, Anil K.
dc.creator Xu, Dawei
dc.creator Miniutti, Giovanni
dc.date.accessioned 2015-02-10T15:47:52Z
dc.date.available 2015-02-10T15:47:52Z
dc.date.issued 2008-07
dc.identifier.issn 0004-637X
dc.identifier.issn 1538-4357
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/25950
dc.description Publisher's version/PDF en_CA
dc.description.abstract We report the discovery of strong soft X-ray emission lines and a hard continuum above 2 keV in the narrow-line Seyfert 1 galaxy Mrk 335 during an extremely low X-ray flux state. Mrk 335 was observed for 22 ks by XMM-Newton in 2007 July as a Target of Opportunity to examine it in its X-ray low flux state, which was discovered with Swift. Long-term light curves suggest that this is the lowest flux state this AGN has ever been seen in. However, Mrk 335 is still sufficiently bright that its X-ray properties can be studied in detail. The X-ray continuum spectrum is very complex and requires several components to model. Statistically, partial covering and blurred reflection models work well. We confirm the presence of a strong narrow Fe line at 6.4 keV. High-resolution spectroscopy with the XMM-Newton RGS reveals strong, soft X-ray emission lines not detected in previous, higher signal-to-noise ratio, XMM-Newton observations, such as highly ionized Fe lines, O VII, and Ne IX and Mg XI lines. The optical /UV fluxes are similar to those previously measured with Swift. Optical spectroscopy taken in 2007 September does not show any changes to optical spectra obtained 8 years earlier. en_CA
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dc.description.provenance Made available in DSpace on 2015-02-10T15:47:52Z (GMT). No. of bitstreams: 1 Gallo_Luigi_C_article_2008.pdf: 1009692 bytes, checksum: 90eb0042ff613c28a04ce15b63ad18eb (MD5) Previous issue date: 2008-07 en
dc.language.iso en en_CA
dc.publisher American Astronomical Society en_CA
dc.relation.uri http://dx.doi.org/10.1086/588213
dc.rights Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
dc.subject.lcsh Active galaxies
dc.subject.lcsh Seyfert galaxies
dc.subject.lcsh Active galactic nuclei
dc.subject.lcsh Galaxies -- Spectra
dc.subject.lcsh X-ray spectroscopy
dc.title XMM-Newton observations of the narrow-line Seyfert 1 galaxy Mrk 335 in a historical low X-ray flux state en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Astrophysical Journal 681, 982-997. (2008) en_CA
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Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
 
Published Version: http://dx.doi.org/10.1086/588213
 
 

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