The properties of the X-ray corona in the distant ($z=3.91$) quasar APM 08279+5255

Abstract

We present new joint XMM-Newton and NuSTAR observations of APM 08279+5255, a gravitationally-lensed, broad-absorption line quasar ($z=3.91$). After showing a fairly stable flux ($f_{2-10}\simeq 4-5.5\times 10^{-13}\mathrm{erg}{\mathrm{s}}^{-1}$) from 2000 to 2008, APM 08279+5255 was found in a fainter state in the latest X-ray exposures ($f_{2-10}\simeq 2.7\times 10^{-13}\mathrm{erg}{\mathrm{s}}^{-1}$), which can likely be ascribed to a lower X-ray activity. Moreover, the 2019 data present a prominent Fe K$\alpha$ emission line and do not show any significant absorption line. This fainter state, coupled to the first hard X-ray sampling of APM 08279+5255, allowed us to measure X-ray reflection and the high-energy cutoff in this source for the first time. From the analysis of previous XMM-Newton and Chandra observations, X-ray reflection is demonstrated to be a long-lasting feature of this source, but less prominent prior to 2008, possibly due to a stronger primary emission. The estimated high-energy cutoff ($E_{\mathrm{cut}}=99_{-35}^{+91}$ keV) sets a new redshift record for the farthest ever measured and places APM 08279+5255 in the allowed region of the compactness-temperature diagram of X-ray coronae, in agreement with previous results on high-$z$ quasars.

arXiv commentAccepted for publication in A&A. 14 pages, 4 figures, 6 tables

References in corpus (75)

• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• HI4PI: A full-sky HI survey based on EBHIS and GASS
• Revisiting the Unified Model of Active Galactic Nuclei
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• Powerful Outflows and Feedback from Active Galactic Nuclei
• Statistics: Handle with Care, Detecting Multiple Model Components with the Likelihood Ratio Test
• BAT AGN Spectroscopic Survey - V. X-ray properties of the Swift/BAT 70-month AGN catalog
• The physics of galactic winds driven by active galactic nuclei
• The XMM-Newton view of PG quasars I. X-ray continuum and absorption
• A 3 dimensional diagnostic diagram for Seyfert 2s: probing X-ray absorption and Compton thickness
• The X-ray Properties of the Most-Luminous Quasars from the Sloan Digital Sky Survey
• The role of the reflection fraction in constraining black hole spin
• A Model for the X-Ray and UV Emission from Seyfert Galaxies and Galactic Black Holes
• BAT AGN Spectroscopic Survey I: Spectral Measurements, Derived Quantities, and AGN Demographics
• A diversity of dusty AGN tori: Data release for the VLTI/MIDI AGN Large Program and first results for 23 galaxies
• CAIXA: a Catalogue of AGN In the XMM-Newton Archive I. Spectral analysis
• X-ray Spectral Survey with XMM--Newton of a Complete Sample of Nearby Seyfert Galaxies
• The X-ray spectra of Compton-thick Seyfert 2 galaxies as seen by BeppoSAX
• ON THE GEOMETRY OF THE X-RAY EMITTING REGION IN SEYFERT GALAXIES
• BAT AGN Spectroscopic Survey -- XII. The relation between coronal properties of Active Galactic Nuclei and the Eddington ratio
• Seyfert galaxies in the local Universe (z$\le$ 0.1): the average X-ray spectrum as seen by $BeppoSAX$
• On the Iwasawa-Taniguchi effect of radio-quiet AGN
• Testing Comptonization models using BeppoSAX observations of Seyfert 1 galaxies
• Discovery of an ionized Fe-K edge in the z=3.91 Broad Absorption Line Quasar APM 08279+5255 with XMM-Newton
• A NuSTAR census of coronal parameters in Seyfert galaxies
• Imaging the Molecular Gas in a z=3.9 Quasar Host Galaxy at 0.3" Resolution: A Central, Sub-Kiloparsec Scale Star Formation Reservoir in APM 08279+5255
• Confirmation of and Variable Energy Injection by a Near-Relativistic Outflow in APM 08279+5255
• The INTEGRAL high energy cut-off distribution of type 1 AGN
• X-ray Lighthouses of the High-Redshift Universe. II. Further Snapshot Observations of the Most Luminous z>4 Quasars with Chandra
• Powering galactic super-winds with small-scale AGN winds
• The high-Eddington NLS1 Ark 564 has the coolest corona
• The Sizes and Kinematic Structure of Absorption Systems Towards the Lensed Quasar APM08279+5255
• X-ray properties of the Northern Galactic Cap AGNs in the 58-month Swift-BAT catalog
• X-ray absorption lines suggest matter infalling onto the central black-hole of Mrk 509
• X-ray evidence for a mildly relativistic and variable outflow in the luminous Seyfert 1 galaxy Mrk509
• APM 08279+5255: Keck Near- and Mid-IR High-Resolution Imaging
• The INTEGRAL Complete Sample of Type 1 AGN
• Hard X-ray spectra of AGN in the INTEGRAL complete sample
• Caught in the Act; Chandra Observations of Microlensing of the Radio-Loud Quasar MG J0414+0534
• NuSTAR Survey of Obscured Swift/BAT-selected Active Galactic Nuclei: II. Median High-energy Cutoff in Seyfert II Hard X-ray Spectra
• Variable X-ray absorption in the mini-BAL QSO PG 1126-041
• Searching for Ultra-fast Outflows in AGN using Variability Spectra
• Broadband study of hard X-ray selected absorbed AGN
• Gravitational lensing reveals extreme dust-obscured star formation in quasar host galaxies
• Light bending and X-ray echoes from behind a supermassive black hole
• X-ray Coronal Properties of Swift/BAT-Selected Seyfert 1 Active Galactic Nuclei
• NuSTAR/XMM-Newton monitoring of the Seyfert 1 galaxy HE 1143-1810. Testing the two-corona scenario
• Discovery of a relativistic Fe line in PG 1425+267 with XMM--Newton and study of its short-timescale variability
• The NuSTAR Extragalactic Surveys: X-ray spectroscopic analysis of the bright hard-band selected sample
• Probing the hard X-ray properties of high-redshift Radio-Quiet Quasars with ASCA
• Constraints on light bending and reflection from the hard X-ray background
• NuSTAR reveals the extreme properties of the super-Eddington accreting SMBH in PG 1247+267
• Coronal properties of Swift/BAT-selected Seyfert 1 AGN observed with NuSTAR
• Revealing the location and structure of the accretion disk-wind in PDS456
• NuSTAR Hard X-ray View of Low-luminosity Active Galactic Nuclei: High-energy Cutoff and Truncated Thin Disk
• Swift/XRT- NuSTAR spectra of type 1 AGN]{Swift/XRT- NuSTAR spectra of type 1 AGN: confirming INTEGRAL results on the high energy cut-off
• The nature of the extreme X-ray variability in the NLS1 1H 0707-495
• The distribution of the coronal temperature in Seyfert 1 galaxies
• Fundamental X-ray Corona Parameters of Swift/BAT AGN
• A multi-epoch spectroscopic study of the BAL quasar APM 08279+5255 II. Emission- and absorption-line variability time lags
• Suzaku Observations of Near-Relativistic Outflows in the BAL Quasar APM 08279+5255
• The flaring X-ray corona in the quasar PDS 456
• The NuSTAR Extragalactic Survey: Average broad-band X-ray spectral properties of the NuSTAR detected AGN
• Nustar Measurement Of Coronal Temperature In Two Luminous, High Redshift Qsos
• NuSTAR observations of Mrk 766: distinguishing reflection from absorption
• Correlation between relativistic reflection fraction and photon index in NuSTAR sample of Seyfert 1 AGN
• The XMM Deep survey in the CDFS V. Iron K lines from active galactic nuclei in the distant Universe
• The rest-frame UV-to-optical spectroscopy of APM 08279+5255 - BAL classification and black hole mass estimates
• XMM-Newton reveals a Seyfert-like X-ray spectrum in the z=3.6 QSO B1422+231
• On the high energy cut-off of accreting sources: is GR relevant?
• Coronal properties of the luminous radio-quiet quasar QSO B2202$-$209
• The X-ray emission of the Seyfert 2 galaxy MCG-01-24-12
• A broadband X-ray view of the NLSy1 1E 0754.6+392.8
• Constraining the Active Galactic Nucleus and Starburst Properties of the IR-luminous Quasar Host Galaxy APM 08279+5255 at Redshift 4 with SOFIA
• The X-ray coronae in NuSTAR bright active galactic nuclei

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