[A96] Mrk 474 25 , the SIMBAD biblio

Five examples of close associations of quasars with bright, low redshift galaxies have been observed in X-ray wavelengths with ROSAT. In the three cases where the galaxies are detected strongly, the nuclei of the galaxies have X-ray extensions in the direction of the adjacent quasars. In all cases the active galaxies and bright quasars are located at the origin of apparent lines or pairs of X-ray sources, some involving filamentary X-ray connections to fainter quasars or candidate blue stellar objects. A number of X-ray sources in these fields are found to be in excess of average background values. The filaments and connections have measured fluxes of 0.1≲F_X≲2x10^–13erg/cm²/s and they tend to radiate more strongly in the harder end of the 0.1-2.4keV energy band. Tables of positions and properties of the detected X-ray sources in each field are given and candidates for optical identifications are described.