J/A+AS/134/221ivo://CDS.VizieR/J/A+AS/134/221CDSBrinkmann W.Chester M.Kollgaard R.Feigelson E.Voges W.Hertz P.2000-02-19T19:29:36Z2000-02-19T20:29:07ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frradio-sourcesx-ray-sourcesA 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".1999A&AS..134..221Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/134/221CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/93/145 : Radio survey around North Ecliptic Pole (Kollgaard+, 1994)J/MNRAS/276/614 : Radio-optical 151MHz survey of the N. Ecl. Cap (Lacy+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/134/221https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/134/221http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/134/221https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/134/221https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/134/221http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/134/221GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/134/221/table1 (Compact X-ray/Radio Sources in the North Ecliptic Pole (NEP))https://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?GETtext/xml+votable180.050000true263.22833365.5574170.005555555555555556Cone search capability for table J/A+AS/134/221/table2 (Extended X-ray/Radio Sources in the NEP)https://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?GETtext/xml+votable180.050000true265.31666765.1350.005555555555555556Cone search capability for table J/A+AS/134/221/table3 (Possible additional X-ray/Radio Sources in the NEP)https://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?GETtext/xml+votable180.050000true264.8087569.1286940.0055555555555555565/2559 2901 2903 3839 4010-4011 6/10229-10231 11603 11638-11639 15353 15355 16039 16056https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/134/221?format=asciiX-rayRadiodefaultJ/A+AS/134/221/table1Compact X-ray/Radio Sources in the North Ecliptic Pole (NEP)recnoRecord number assigned by the VizieR team. Should Not be used for identification.intVLA-NEPVLA source designation (Radio data)charm_VLA-NEPMultiplicity index on VLA-NEPcharRA2000Radio right ascension (2000)DE2000Radio declination (2000)S1.5GHz? Integrated flux density at 1.5GHz (20cm)mJyfloatnullablee_S1.5GHz? rms uncertainty on S1.5GHzmJyfloatnullableROSATRXS designationcharDeltaPositional offset between the VLA and X-ray sourcearcsecintLoc[io] Localisation (1)charMaxLiLikelihood value from the EXSAS processingintFX0.1-2.4keV X-ray flux1e-14mW.m**-2floate_FXrms uncertainty on FX1e-14mW.m**-2floatClassOptical morphology classification (2)charoRA? Optical minus radio positional offsetarcsecintnullableoDE? Optical minus radio positional offsetarcsecintnullablel_Bmag[~>] Limit flag on BmagcharBmag? Approximate B magnitudemagfloatnullablen_BmagNote on Bmag (3)charNote[*] Individual note detailed in notes.datcharJ/A+AS/134/221/table2Extended X-ray/Radio Sources in the NEPrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intVLA-NEPVLA source designation (Radio data)charm_VLA-NEPMultiplicity index on VLA-NEPcharRA2000Radio right ascension (2000)DE2000Radio declination (2000)S1.5GHz? Integrated flux density at 1.5GHz (20cm)mJyfloatnullablee_S1.5GHz? rms uncertainty on S1.5GHzmJyfloatnullableROSATRXS designationcharDeltaPositional offset between the VLA and X-ray sourcearcsecintLoc[io] Localisation (1)charMaxLiLikelihood value from the EXSAS processingintFX0.1-2.4keV X-ray flux1e-14mW.m**-2floate_FXrms uncertainty on FX1e-14mW.m**-2floatClassOptical morphology classification (2)charoRA? Optical minus radio positional offsetarcsecintnullableoDE? Optical minus radio positional offsetarcsecintnullablel_Bmag[~>] Limit flag on BmagcharBmag? Approximate B magnitudemagfloatnullablen_BmagNote on Bmag (3)charNote[*] Individual note detailed in notes.datcharJ/A+AS/134/221/table3Possible additional X-ray/Radio Sources in the NEPrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intVLA-NEPVLA source designation (Radio data)charm_VLA-NEPMultiplicity index on VLA-NEPcharRA2000Radio right ascension (2000)DE2000Radio declination (2000)S1.5GHz? Integrated flux density at 1.5GHz (20cm)mJyfloatnullablee_S1.5GHz? rms uncertainty on S1.5GHzmJyfloatnullableROSATRXS designationcharDeltaPositional offset between the VLA and X-ray sourcearcsecintLoc[io] Localisation (1)charMaxLiLikelihood value from the EXSAS processingintFX0.1-2.4keV X-ray flux1e-14mW.m**-2floate_FXrms uncertainty on FX1e-14mW.m**-2floatClassOptical morphology classification (2)charoRA? Optical minus radio positional offsetarcsecintnullableoDE? Optical minus radio positional offsetarcsecintnullablel_Bmag[~>] Limit flag on BmagcharBmag? Approximate B magnitudemagfloatnullablen_BmagNote on Bmag (3)charNote[*] Individual note detailed in notes.datcharJ/A+AS/134/221/notesIndividual notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intVLA-NEPVLA source designationcharm_VLA-NEPMultiplicity index on VLA-NEPcharNoteText of the notechar