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X-ray timing analysis of the quasar PG 1211+143

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Abstract

We report on a timing analysis of a new ~630?ks XMM–Newton observation of the quasar, PG 1211+143. We find a well-defined X-ray power spectrum with a well-detected bend at ~7 × 10-5?Hz, consistent with the established tbend–MBH correlation for luminous, accreting black holes. We find the linear rms–flux relation commonly observed in accreting black hole systems and investigate the energy-dependence of the rms. The fractional rms is roughly constant with energy on short time-scales (<1?d; within observations) whereas there is enhanced soft band variability on long time-scales (between observations typically spaced by a few days). Additionally, we also report on the optical–UV variability using the Optical Monitor on-board XMM–Newton and a ~2-month-long overlapping monitoring programme with Swift. We find that, although there is little UV variability within observations (<1?d), UV variations of a few per cent exist on time-scales of ~days–weeks.

Citation

(2016). X-ray timing analysis of the quasar PG 1211+143. Monthly Notices of the Royal Astronomical Society, 38 -50. https://doi.org/10.1093/mnras/stv2896

Acceptance Date Dec 7, 2015
Publication Date Mar 21, 2016
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Pages 38 -50
DOI https://doi.org/10.1093/mnras/stv2896
Keywords accretion, accretion discs, galaxies, Seyfert, X-rays
Publisher URL http://dx.doi.org/10.1093/mnras/stv2896

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