J/A+A/319/18 J/A+A/319/18 X-ray sources <1 degree from Seyfert galaxies H -D Radecke Astron. Astrophys. 319 18 1997 1997A&A...319...18R Galaxies, Seyfert X-ray source galaxies: Seyfert galaxies: spiral X-rays: galaxies Archived PSPC observations of 26 Seyfert galaxies have been analyzed for bright X-ray sources out to the full extent of the field (< about 50'). Of all Seyferts known this represents a sample 88% complete to B_T_=10mag, 74% complete to 11mag and 50% complete to 12mag. Using the same reduction algorithm, 14 fields centered on stars at high galactic latitudes have been used as control fields. Excluding the two brightest Seyferts, a subset of 24 Seyferts with corrected apparent magnitude between 8.04<B^o,i^_T_<12.90mag show a minimum excess of 46 bright X-ray sources generally distributed between 10 and 25' from the target galaxy. The significances of association of these sources with the Seyferts in the median brightness range are as high as 7.4-sigma.

ROSAT

Object Object name (Seyfert galaxies and reference stars) used in the analysis --- Exp ROSAT PSPC exposure time ks GLAT Galactic latitude of the target object deg Bmag Brightness of the target object (Apparent blue magnitude, corrected for galactic and internal absorption) mag 1/2D25 Semi-apparent major isophotal diameter at surface brightness level 25.0 B-mag/arcsec^2^ arcmin Class Seyfert classification --- MType Seyfert type --- Field Field centered on the object mentioned --- Object Object number --- RAh Right ascension (2000) of the sources detected h RAm Right ascension (2000) of the sources detected min RAs Right ascension (2000) of the sources detected s DE- Declination sign --- DEd Declination (2000) of the sources detected deg DEm Declination (2000) of the sources detected arcmin DEs Declination (2000) of the sources detected arcsec PosOff Offaxis position of the detected sources arcmin Counts Rate Counts rate of the detected sources 10-3ct/s CF CF for control field --- Patricia Bauer CDS 1997May06Hans Dieter Radecke <hdr@mpe-garching.mpg.de> J_A+A_319_18.xml