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Published in

Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 1(492), p. 1135-1141, 2019

DOI: 10.1093/mnras/stz3511

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X-ray reverberation lags from the 1.5 Seyfert galaxy NGC 5273

Journal article published in 2019 by F. M. Vincentelli ORCID, G. Mastroserio, I. McHardy, A. Ingram ORCID, M. Pahari ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Published version: archiving allowed
Data provided by SHERPA/RoMEO

Abstract

ABSTRACT We present the results of X-ray spectral-timing analysis of a 90 ks XMM–Newton observation of the nearby, broad-line, early-type AGN NGC5273. The X-ray spectrum revealed the clear presence of a reflection component at high energies, with a clear signature of a narrow iron line at 6.4 keV, consistent with distant reflection. Applying a relativistic reflection model, we found only marginal evidence for a broader relativistic line component. However, cross-spectral analysis revealed that, between 4 and 6 × 10−4 Hz, the 5–8 keV band lagged the 2–3 keV band, implying reflection of the iron line from material close to the black hole. From the analysis of the lag-energy spectrum, we found a broad, but skewed line with a peak of ≈1000 s at 7.5 keV relative to the continuum, which we interpret as the iron line in the reverberation spectrum from an illuminated accretion disc. From the asymmetry in the shape of lag-energy spectrum, we also found that the source is consistent with having an inclination ≥45°.