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

F M Vincentelli; G Mastroserio; I McHardy; A Ingram; M Pahari

doi:10.1093/mnras/stz3511

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

F M Vincentelli
, G Mastroserio
, I McHardy
, A Ingram
, M Pahari

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

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, crossspectral 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°.

Original language	English
Pages (from-to)	1135-1141
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	492
Issue number	1
Early online date	17 Dec 2019
DOIs	https://doi.org/10.1093/mnras/stz3511
Publication status	Published - Feb 2020
Externally published	Yes

Funding

FV would like to thank Michiel van der Klis for the useful discussion and comments on the timing analysis of this data set. IMcH and FV thank STFC for support under grant ST/M001326/1. MP acknowledges Royal Society-SERB Newton International Fellowship support funded jointly by the Royal Society, UK and the Science and Engineering Board of India (SERB) through Newton-Bhabha Fund.

Funders	Funder number
Science and Engineering Research Board, Department of Science and Technology
The Royal Society
UK Research and Innovation
Science and Technology Facilities Council (STFC)	ST/M001326/1
Newton Fund
Science and Engineering Research Board, Department of Science and Technology

Keywords

Accretion
accretion discs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stz3511

Cite this

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title = "X-ray reverberation lags from the 1.5 Seyfert galaxy NGC 5273",

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, crossspectral 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°.",

keywords = "Accretion, accretion discs",

author = "Vincentelli, \{F M\} and G Mastroserio and I McHardy and A Ingram and M Pahari",

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T1 - X-ray reverberation lags from the 1.5 Seyfert galaxy NGC 5273

AU - Vincentelli, F M

AU - Mastroserio, G

AU - McHardy, I

AU - Ingram, A

AU - Pahari, M

PY - 2020/2

Y1 - 2020/2

N2 - 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, crossspectral 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°.

AB - 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, crossspectral 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°.

KW - Accretion

KW - accretion discs

UR - https://www.scopus.com/pages/publications/85079466207

U2 - 10.1093/mnras/stz3511

DO - 10.1093/mnras/stz3511

M3 - Article

SN - 0035-8711

VL - 492

SP - 1135

EP - 1141

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

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

Abstract

Funding

Keywords

ASJC Scopus subject areas

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