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

Abstract

We report on a timing analysis of a new ~630ks XMM-Newton observation of the quasar, PG 1211+143. We find a well-defined X-ray power spectrum with a well-detected bend at ~7e-5 Hz, consistent with the established bend-timescale--black-hole-mass 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 timescales (< 1 day; within observations) whereas there is enhanced soft band variability on long timescales (between observations typically spaced by a few days). Additionally, we also report on the optical--UV variability using the OM 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 day), UV variations of a few per cent exist on time-scales of ~days--weeks.

Accepted for publication in MNRAS (14 pages, 13 figures, 4 tables)

References in corpus (7)

• Space Telescope and Optical Reverberation Mapping Project. II. Swift and HST Reverberation Mapping of the Accretion Disk of NGC 5548
• Testing thermal reprocessing in AGN accretion discs
• Swift monitoring of NGC 5548: X-ray reprocessing and short term UV/optical variability
• Correlated X-ray/Optical Variability in the Quasar MR2251-178
• The variability plane of accreting compact objects
• X-ray and optical variability of Seyfert 1 galaxies as observed with XMM-Newton
• Eight powers of ten: similarities in black hole accretion on all mass scales

Cited by in corpus (17)

• Explaining changing-look AGN with state transition triggered by rapid mass accretion rate drop
• Ultraviolet and X-ray variability of active galactic nuclei with Swift
• On the Observational Difference Between the Accretion Disk-Corona Connections among Super- and Sub-Eddington Accreting Active Galactic Nuclei
• The variable, fast soft X-ray wind in PG 1211+143
• Imprints of a high velocity wind on the soft x-ray spectrum of PG 1211+143
• Detection of a second high velocity component in the highly ionized wind from PG 1211+143
• The flaring X-ray corona in the quasar PDS 456
• A deep X-ray view of the bare AGN Ark 120. III. X-ray timing analysis and multiwavelength variability
• An ultra-fast inflow in the luminous Seyfert PG1211+143
• Detection of the high energy cut-off from the Seyfert 1.5 galaxy NGC 5273
• Energy-dependent variability of the bare Seyfert 1 galaxy Ark 120
• More than softer-when-brighter: the X-Ray powerlaw spectral variability in NGC 4051
• Testing relativistic reflection and resolving outflows in PG 1211+143 with XMM-Newton and NuSTAR
• X-ray variability analysis of a large series of XMM-Newton + NuSTAR observations of NGC 3227
• X-ray time lags in PG 1211+143
• Effects of ultra-fast outflows on X-ray time lags in AGN
• X-Ray Spectral Variability of the TeV HBL Blazar PG 1553+113 with XMM-Newton