Lobban, AP and Vaughan, S and Pounds, K and Reeves, JN (2016) X-ray timing analysis of the quasar PG 1211+143. Monthly Notices of the Royal Astronomical Society, 457 (1). 38 -50. ISSN 1365-2966

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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.

Item Type: Article
Additional Information: This is the accepted author manuscript (AAM). The final published version Lobban, A.P. et al., 2016. X-ray timing analysis of the quasar PG 1211+143. Monthly Notices of the Royal Astronomical Society, 457(1), pp.38–50 is available online via Oxford University Press at http://dx.doi.org/10.1093/mnras/stv2896. Please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: accretion, accretion discs, galaxies, Seyfert, X-rays
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 09 Dec 2016 14:26
Last Modified: 09 Dec 2016 14:27
URI: http://eprints.keele.ac.uk/id/eprint/2596

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