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