Identification of X-ray sources around Seyferts Virtual Observatory Resource

Authors
  1. Arp H.
  2. Published by
    CDS
Abstract

Excess numbers of X-ray sources around bright Seyfert galaxies have been demonstrated with significances of association up to 7.4-sigma (Radecke, 1997A&A...319...18R). The optical identification of these sources is shown here to be predominantly blue stellar objects (BSO's) of which some are already catalogued as quasars. Excluding the two brightest Seyferts, a subset of 24 with apparent magnitudes between 8.04<=B_T_^o,i^<=12.90mag. show a minimum excess of >46 bright X-ray sources. These excess X-ray sources are generally distributed between 10'<r<40' and 12 of the Seyferts show conspicuous pairs of X-ray sources across their active nuclei. Additional pairing and alignment of sources is seen for the remaining Seyferts. Among the paired X-ray sources, 53 have been identified as BSO's. Some double and multiple BSO's have been identified which are candidates for groups and associations of quasars. Some groups are well aligned and some centered on small blue galaxies. Four previously known BL Lac objects fall close enough to the Seyferts in this sample to confirm, at a significance level of 1-2x10^-9^, a previously reported association of BL Lac objects with bright, low redshift galaxies.

Keywords
  1. seyfert-galaxies
  2. x-ray-sources
Bibliographic source Bibcode
1997A&A...319...33A
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/319/33
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/319/33
Document Object Identifer DOI
doi:10.26093/cds/vizier.33190033

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/319/33
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/319/33
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/319/33
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/319/33/table3?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/319/33/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/319/33/table3?

History

1997-12-09T17:53:05Z
Resource record created
1997-12-09T16:53:11Z
Updated
1997-12-09T17:53:05Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr