Coronal properties of the luminous radio-quiet quasar QSO B2202$-$209

Abstract

We present an analysis of the joint $XMM$-$Newton$ and $NuSTAR$ observations of the radio-quiet quasar QSO B2202$-$209. Using an optical observation from the Hale Telescope at the Palomar Observatory, we revise the redshift of the source from the previously reported $z=1.77$ to $z=0.532$, and we estimate the mass of the central black hole, $\log (M_{\mathrm{BH}}/M_{\odot })=9.08\pm 0.18$. The X-ray spectrum of this source can be well described by a power-law of photon index $\Gamma =1.82\pm 0.05$ with $E_{\mathrm{cut}}=152_{-54}^{+103}\mathrm{keV}$, in the rest frame of the source. Assuming a Comptonisation model, we estimate the coronal temperature to be $k{T}_{\mathrm{e}}=42\pm 3\mathrm{keV}$ and $k{T}_{\mathrm{e}}=56\pm 3\mathrm{keV}$ for a spherical and a slab geometry, respectively. The coronal properties are comparable to the ones derived for local AGN, despite a difference of around one order of magnitude in black hole mass and X-ray luminosity ($L_{2-10}=1.93\times 10^{45}\mathrm{erg}{\mathrm{s}}^{-1}$). The quasar is X-ray loud, with an unusually flat observed optical-to-X-ray spectral slope ${\alpha }_{\mathrm{OX}}=1.00\pm 0.02$, and has an exceptionally strong optical [O III] line. Assuming that both the X-ray emission and the [O III] line are isotropic, these two extreme properties can be explained by a nearly edge-on disk, leading to a reduction in the observed UV continuum light.

8 pages, 4 figures, accepted for publication in MNRAS

References in corpus (15)

• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• Non-linear Least Squares Fitting in IDL with MPFIT
• On the X-ray, optical emission line and black hole mass properties of local Seyfert galaxies
• CAIXA: a Catalogue of AGN In the XMM-Newton Archive I. Spectral analysis
• Occultation measurement of the size of the X-ray emitting region in the Active Galactic Nucleus of NGC 1365
• The NuSTAR spectrum of Mrk 335: Extreme relativistic effects within 2 gravitational radii of the event horizon?
• Driving extreme variability: The evolving corona and evidence for jet launching in Markarian 335
• X-Ray and Optical Microlensing in the Lensed Quasar PG 1115+080
• The Broad-band X-ray Spectrum of IC 4329A from a Joint NuSTAR/Suzaku Observation
• Suzaku observations of Mrk 335: Confronting partial covering and relativistic reflection
• Rest-frame Optical Spectra and Black Hole Masses of 3<z<6 Quasars
• The hard X-ray spectrum of NGC 5506 as seen by NuSTAR
• Coronal Properties of the Seyfert 1.9 Galaxy MCG -05-23-016 Determined from Hard X-ray Spectroscopy with NuSTAR
• NuSTAR Reveals the Comptonizing Corona of the Broad-Line Radio Galaxy 3C 382
• Orientation effects on spectral emission features of quasars

Cited by in corpus (6)

• NuSTAR Survey of Obscured Swift/BAT-selected Active Galactic Nuclei: II. Median High-energy Cutoff in Seyfert II Hard X-ray Spectra
• Nustar Measurement Of Coronal Temperature In Two Luminous, High Redshift Qsos
• The properties of the X-ray corona in the distant ($z=3.91$) quasar APM 08279+5255
• Breaking the rules at $z\simeq$0.45: the rebel case of RBS 1055
• The first X-ray look at SMSS J114447.77-430859.3: the most luminous quasar in the last 9 Gyr
• The XMM-Newton and NuSTAR view of IRASF11119+3257. I Detection of multiple UFO components and a very cold corona