Powerful Radio Sources in the Southern Sky. II. A SWIFT X-Ray Perspective

Abstract

We recently constructed the G4Jy-3CRE, a catalog of extragalactic radio sources based on the GLEAM 4-Jy (G4Jy) sample, with the aim of increasing the number of powerful radio galaxies and quasars with similar selection criteria to those of the revised release of the Third Cambridge catalog (3CR). The G4Jy-3CRE consists of a total of 264 radio sources mainly visible from the Southern Hemisphere. Here, we present an initial X-ray analysis of 89 G4Jy-3CRE radio sources with archival X- ray observations from the Neil Gehrels Swift Observatory. We reduced a total of 615 Swift observations, for about 0.89 Msec of integrated exposure time, we found X-ray counterparts for 61 radio sources belonging to the G4Jy-3CRE, 11 of them showing extended X-ray emission. The remaining 28 sources do not show any X-ray emission associated with their radio cores. Our analysis demonstrates that X-ray snapshot observations, even if lacking uniform exposure times, as those carried out with Swift, allow us to (i) verify and/or re ne the host galaxy identi cation; (ii) discover the extended X-ray emission around radio galaxies of the intracluster medium when harbored in galaxy clusters, as the case of G4Jy 1518 and G4Jy 1664, and (iii) detect X-ray radiation arising from their radio lobes, as for G4Jy 1863.

35 pages, 17 figures, 2 tables; second paper of a series, pre-proof version

References in corpus (48)

• HI4PI: A full-sky HI survey based on EBHIS and GASS
• Heating Hot Atmospheres with Active Galactic Nuclei
• The MUSE second-generation VLT instrument
• GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey I: A low-frequency extragalactic catalogue
• The VLA Low-frequency Sky Survey
• The 1% Concordance Hubble Constant
• Rapid Variability of Blazar 3C 279 during Flaring States in 2013-2014 with Joint Fermi-LAT, NuSTAR, Swift, and Ground-Based Multi-wavelength Observations
• The X-ray nuclei of intermediate-redshift radio sources
• The Many Routes to AGN Feedback
• An optical spectroscopic survey of the 3CR sample of radio galaxies with z<0.3. I. Presentation of the data
• X-ray spectral evolution of TeV BL Lac objects: eleven years of observations with BeppoSAX, XMM-Newton and SWIFT satellites
• The growth of the galaxy cluster Abell 85: mergers, shocks, stripping and seeding of clumping
• GPS radio sources: new optical observations and an updated master list
• Hubble Space Telescope Near-Infrared Snapshot Survey of 3CR radio source counterparts at low redshift
• WFPC2 LRF Imaging of Emission Line Nebulae in 3CR Radio Galaxies
• Unveiling the nature of the unidentified gamma-ray sources IV: the $\text{Swift}$ catalog of potential X-ray counterparts
• The Gamma-ray Blazar Quest: new optical spectra, state of art and future perspectives
• Multiwavelength behaviour of the blazar 3C279: decade-long study from $\gamma$-ray to radio
• Spitzer Mid-IR Spectroscopy of Powerful 2Jy and 3CRR Radio Galaxies. II. AGN Power Indicators and Unification
• Optical spectroscopy of BL Lacertae objects. Broad lines, companion galaxies and redshift lower limits
• Threads, Ribbons, and Rings in the Radio Galaxy IC 4296
• WATCAT: a tale of wide-angle tailed radio galaxies
• OCCAM: a flexible, multi-purpose and extendable HPC cluster
• Extended X-ray emission in radio galaxies: the peculiar case of 3C 305
• The optical morphology of A3667 re-examined
• VLA Radio Study of a Sample of Nearby X-ray and Optically Bright Early-Type Galaxies
• An X-ray survey of the 2Jy sample. II: X-ray emission from extended structures
• The GLEAM 4-Jy (G4Jy) Sample: II. Host-galaxy identification for individual sources
• Optical spectroscopic observations of low-energy counterparts of Fermi-LAT gamma-ray sources
• The GLEAM 4-Jy (G4Jy) Sample: I. Definition and the catalogue
• The Swift X-ray Telescope Cluster Survey: data reduction and cluster catalog for the GRB fields
• Beyond Simple AGN Unification with Chandra-observed 3CRR Sources
• The MURALES survey. III. Completing the MUSE observations of 37 3C low-z radio galaxies
• The $\text{Chandra}$ 3CR extragalactic survey at high redshift
• The Swift X-ray Telescope Cluster Survey III: Cluster Catalog from 2005-2012 Archival Data
• The $\gamma$-ray sky seen at X-ray energies I. Searching for the connection between X-rays and $\gamma$-rays in Fermi BL Lac objects
• The MURALES survey. VI. Properties and origin of the extended line emission structures in radio galaxies
• The SWIFT AGN and Cluster Survey I: Number Counts of AGN and Galaxy Clusters
• The $\gamma$-ray sky seen at X-ray energies II: the Swift hunt of Fermi BL Lac objects among unidentified gamma-ray sources
• MeerKAT follow-up of enigmatic GLEAM 4-Jy (G4Jy) sources
• Extended X-ray emission around FR II radio galaxies: hotspots, lobes and galaxy clusters
• EXSdetect: an end-to-end software for extended source detection in X-ray images: application to Swift-XRT data
• Powerful Radio Sources in the Southern Sky. I. Optical Identifications
• High contrast imaging for the enhanced resolution imager and spectrometer (ERIS)
• The Swift X-ray Telescope Cluster Survey II. X-ray spectral analysis
• A Swift X-ray view of the SMS4 sample -- X-ray properties of 31 quasars and radio galaxies
• A non cool-core 4.6-keV cluster around the bright nearby radio galaxy PKS B1416-493
• A multifrequency characterization of the extragalactic hard X-ray sky

Cited by in corpus (3)

• A Swift X-ray view of the SMS4 sample -- II: X-ray properties of 17 bright radio sources
• SALT spectroscopic follow-up of the G4Jy Sample
• Swift-XRT follow-up analysis of unidentified hard X-ray sources