Radio-loud ROSAT sources near NEP Virtual Observatory Resource

Authors
  1. Brinkmann W.
  2. Chester M.
  3. Kollgaard R.
  4. Feigelson E.
  5. Voges W.
  6. Hertz P.
  7. Published by
    CDS
Abstract

A deep and large-area survey of the North Ecliptic Pole region was made with the ROSAT All-Sky Survey and the VLA to elucidate the population of radio-loud extragalactic objects. A region of 29.3 square degrees was surveyed with sensitivities around 5x10^-14^erg/s/cm^2^ in the soft X-ray band and 1mJy at 1.5GHz. Optical counterparts were sought on digitized Schmidt plates from POSS-I and II. Seventy-four reliable RASS-VLA sources were found. The sample is a heterogeneous mixture of Seyfert galaxies, quasars, BL Lac objects, galaxy clusters and groups containing a radio galaxy. Optical magnitudes range from B=~14 to B>22. Three results are noteworthy: (1) the bimodality in the ratio of radio to optical emission seen in optically- and X-ray-selected AGN samples is also evident in the ROSAT-VLA objects; (2) X-ray and radio selection is an effective method for locating poor galaxy clusters and groups; and (3) a considerable population of optically faint but X-ray/radio-bright objects is present. This last group may be either distant clusters with radio galaxies or "red quasars".

Keywords
  1. radio-sources
  2. x-ray-sources
Bibliographic source Bibcode
1999A&AS..134..221B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/134/221
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+AS/134/221

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/134/221
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/134/221
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/134/221
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+AS/134/221/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/221/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/221/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/221/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/221/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/221/table2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/221/table3?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/221/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/221/table3?

History

2000-02-19T20:29:07Z
Resource record created
2000-02-19T19:29:36Z
Updated
2000-02-19T20:29:07Z
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