Discovery of the Most X-ray Luminous Quasar SRGE J170245.3+130104 at Redshift $$\boldsymbol{z\approx 5.5}$$

@inproceedings{Khorunzhev2021DiscoveryOT,
  title={Discovery of the Most X-ray Luminous Quasar SRGE J170245.3+130104 at Redshift \$\$\boldsymbol\{z\approx 5.5\}\$\$},
  author={G. A. Khorunzhev and Alexander V. Meshcheryakov and P Medvedev and V. D. Borisov and Rodion Burenin and Roman A. Krivonos and R. Uklein and Elena Shablovinskaya and Vladimir Afanasyev and Serguei N. Dodonov and Rashid Alievich Sunyaev and Sergey Yu. Sazonov and M. R. Gilfanov Space Research Institute Ras and Kazan Federal University and Faculty of Mathematics and Cybernetics Lomonosov Moscow State University and Special Astrophysical Observatory Ras and Max-Planck-Institut fur Astrophysik - Garching},
  year={2021}
}
SRGE J170245.3+130104 was discovered by the eROSITA telescope aboard the SRG space observatory on March 13-15, 2020 during the first half-year scan of its all-sky X-ray survey. The optical counterpart of the X-ray source was photometrically identified as a distant quasar candidate at z ≈ 5.5. Follow-up spectroscopic observations, done in August/September 2020 with the SCORPIO-II instrument at the BTA 6-m telescope, confirmed that SRGE J170245.3+130104 is a distant quasar at redshift zspec = 5… Expand
1 Citations
XMM–Newton observations of the extremely X-ray luminous quasar CFHQS J142952+544717=SRGE J142952.1 + 544716 at redshift z = 6.18
We present results from a 20 ks XMM-Newton DDT observation of the radio-load quasar CFHQS J142952+544717 at z=6.18, whose extreme X-ray luminosity was recently revealed by the SRG/eROSITA telescopeExpand

References

SHOWING 1-10 OF 89 REFERENCES
The First Distant X-ray Quasars ($$\boldsymbol{z\sim 4}$$) among the Sources Discovered by the eROSITA Telescope of the SRG Orbital Observatory during a Deep Lockman Hole Survey
During a deep extragalactic Lockman Hole sky survey with an area of 18.5 sq. deg, which was conducted when the SRG observatory was flying to the Lagrange point L2, the eROSITA telescope detected Expand
The X-ray properties of z ~ 6 luminous quasars
We present a systematic analysis of X-ray archival data of all the 29 quasars (QSOs) at $z$ > 5.5 observed so far with Chandra, XMM-Newton and Swift-XRT, including the most-distant quasar everExpand
Optical spectroscopy of candidates for quasars at 3 < z < 5.5 from the XMM-newton X-ray survey. A distant X-ray quasar at z = 5.08
We present the results of optical spectroscopy for 19 quasar candidates at photometric redshifts zphot ≳ 3, 18 of which enter into the Khorunzhev et al. (2016) catalog (K16). This is a catalog ofExpand
X-Ray Observations of a [C ii]-bright, z = 6.59 Quasar/Companion System
We present deep Chandra observations of PSO J231.6576$-$20.8335, a quasar at redshift z=6.59 with a nearby (${\sim}8$ proper kpc) companion galaxy. ALMA observed both the quasar and companion to beExpand
The first blazar observed at z > 6
We present the discovery of PSO J030947.49+271757.31, the radio brightest (23.7 mJy at 1.4 GHz) active galactic nucleus (AGN) at z>6.0. It was selected by cross-matching the NRAO VLA Sky Survey andExpand
The X-ray properties of z > 6 quasars: no evident evolution of accretion physics in the first Gyr of the Universe
Context. X-ray emission from quasars (QSOs) has been used to assess supermassive black hole accretion properties up to z ≈ 6. However, at z >  6 only ≈15 QSOs are covered by sensitive X-rayExpand
An extremely X-ray weak blazar at z = 5
We present the discovery and properties of DES J014132.4−542749.9 (DES0141−54), a new powerful radio-loud active galactic nucleus (AGN) in the early Universe (z = 5.0). It was discovered byExpand
Optical Spectroscopy of SRG/eROSITA Objects with 2.5-m Telescope at the Caucasus Mountain Observatory of the SAI MSU
Based on observations with the new transient double-beam spectrograph (TDS) at the 2.5-m telescope of the Caucasus Mountain Observatory of SAI MSU, we have determined the types and found theExpand
X-Ray Observations of a z ∼ 6.2 Quasar/Galaxy Merger
Quasars at early redshifts ($z > 6$) with companion galaxies offer unique insights into the growth and evolution of the first supermassive black holes. Here, we report on a 150 ks Chandra observationExpand
A Survey of z > 5.7 Quasars in the Sloan Digital Sky Survey. IV. Discovery of Seven Additional Quasars* **
The authors present the discovery of seven quasars at z > 5.7, selected from {approx} 2000 deg{sup 2} of multicolor imaging data of the Sloan Digital Sky Survey (SDSS). The new quasars have redshiftsExpand
...
1
2
3
4
5
...