Please use this identifier to cite or link to this item:
Title: XMM-Newton observations of 3C 273
Authors: Page, Kim L.
Turner, Martin J. L.
Done, C.
O'Brien, Paul T.
Reeves, J. N.
Sembay, S.
Stuhlinger, M.
First Published: 21-Mar-2004
Publisher: Oxford University Press (OUP) on behalf of the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, 2004, 349 (1), pp. 57-67
Abstract: A 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 Comptonization 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 reflection grating spectrometer spectrum of 3C 273, a strong detection of the O vii Heα 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, Sembach & Canizares and Rasmussen, Kahn & Paerels.
DOI Link: 10.1111/j.1365-2966.2004.07499.x
ISSN: 0035-8711
eISSN: 1365-2966
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2004 Royal Astronomical Society. Deposited with reference to the publisher’s open access archiving policy.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

Files in This Item:
File Description SizeFormat 
MNRAS-2004-Page-57-67.pdfPublished (publisher PDF)434.52 kBAdobe PDFView/Open

Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.