XMM-Newton observations of 3C 273

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dc.creatorPage, K. L.
dc.creatorTurner, M. J. L.
dc.creatorDone, C.
dc.creatorO'Brien, P. T.
dc.creatorReeves, J. N.
dc.creatorSembay, S.
dc.creatorStuhlinger, M.
dc.date2003-12-05
dc.date.accessioned2026-07-07T10:47:45Z
dc.date.available2026-07-07T10:47:45Z
dc.descriptionA series of nine XMM-Newton observations of the radio-loud quasar 3C 273 are presented, concentrating mainly on the soft excess. Although most of the individual observations do not show evidence for iron emission, co-adding them reveals a weak, broad line (EW ~ 56 eV). The soft excess component is found to vary, confirming previous work, and can be well fitted with multiple blackbody components, with temperatures ranging between ~40 and ~330 eV, together with a power-law. Alternatively, a Comptonisation model also provides a good fit, with a mean electron temperature of ~350 eV, although this value is higher when the soft excess is more luminous over the 0.5-10 keV energy band. In the RGS spectrum of 3C 273, a strong detection of the OVII He-alpha absorption line at zero redshift is made; this may originate in warm gas in the local intergalactic medium, consistent with the findings of both Fang et al. (2003) and Rasmussen et al. (2003).
dc.description12 pages, 19 figures, accepted for publication in MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/0312148
dc.identifierhttp://arxiv.org/abs/astro-ph/0312148
dc.identifierMon.Not.Roy.Astron.Soc.349:57,2004
dc.identifierdoi:10.1111/j.1365-2966.2004.07499.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183642
dc.subjectAstrophysics
dc.titleXMM-Newton observations of 3C 273
dc.typetext

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