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

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

Blog Article

We recently constructed the G4Jy-3CRE, a catalog of wac 4011 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 624 Swift observations, for about 0.9 Ms of integrated exposure time.

We found X-ray counterparts for 59 radio sources belonging to the G4Jy-3CRE, nine of them showing extended X-ray emission.The remaining 30 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 refine the host galaxy identification; (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 lolasalinas.com G4Jy 1664; and (iii) detect X-ray radiation arising from their radio lobes, as for G4Jy 1863.