J/A+A/446/97ivo://CDS.VizieR/J/A+A/446/97doi:10.26093/cds/vizier.34460097CDSBranchesi M.Gioia I.M.Fanti C.Fanti R.Perley R.2007-01-01T13:01:18Z2007-01-01T13:59:49ZCDS support team

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

cds-question@unistra.frgalaxy-clustersradio-galaxiesredshiftedgalaxy-classification-systemsA complete sample of 18 X-ray selected clusters of galaxies belonging to the ROSAT North Ecliptic Pole (NEP) survey has been observed with the Very Large Array at 1.4GHz in B configuration. These are the most distant clusters in the X-ray survey with redshift in the range 0.3<z<0.8. Seventy-nine radio sources are detected within half an Abell radius with an observed peak brightness >=0.17mJy/beam, except for three sources, belonging to the same cluster, which have a higher peak brightness limit of 0.26mJy/beam. The NEP field source counts are in good agreement with the source counts of a comparison survey, the VLA-VIRMOS deep field survey, indicating that the NEP sample is statistically complete. Thirty-two out of the 79 sources are within 0.2 Abell radii, twenty-two of them are considered cluster members based on spectroscopic redshifts or their optical magnitude and morphological classification. The cluster radio galaxies are used to construct the Radio Luminosity Function (RLF) of distant X-ray selected clusters. A comparison with two nearby cluster RLFs shows that the NEP RLF lies above the local ones, has a steeper slope at low radio powers (<=10^24^W/Hz) and shows no evidence for a break at about 6x10^24^W/Hz which is observed in the nearby cluster RLFs. We discuss briefly the origin and possible explanations of the differences observed in the radio properties of nearby and distant clusters of galaxies. The main result of this study is that the RLF of the distant X-ray clusters is very different from that of the local rich Abell clusters.2006A&A...446...97Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/446/97CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/134/221 : Radio-loud ROSAT sources near NEP (Brinkmann+, 1999)J/ApJS/93/145 : Radio survey around North Ecliptic Pole (Kollgaard+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/446/97https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/446/97http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/446/97https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/446/97https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/446/97http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/446/97GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/446/97/table2 (The Radio Source Catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/446/97/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/446/97/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/446/97/table2?GETtext/xml+votable180.050000true269.33966.49586110.005555555555555556Cone search capability for table J/A+A/446/97/table3 (Optical counterparts of the radio sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/446/97/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/446/97/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/446/97/table3?GETtext/xml+votable180.050000true269.77162565.34927780.0055555555555555566/10229-10230 10236-10237 10239 11604-11606 11615 11639 11643 11645 11729 15353 15356 16046 16056https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/446/97?format=asciiOpticalRadiodefaultJ/A+A/446/97/table2The Radio Source CataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNEPCluster designation, NEP NNNNmeta.id.part;meta.mainintrmsAverage image noise within half an Abell radius in mJy/beammJystat.snrfloatSrc[A-M] Source designationmeta.id.part;meta.maincharOC[*] indicates an optical counterpart in table3meta.notecharRAJ2000Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)pos.eq.dec;meta.mainDistDistance from the cluster center in units of Abell radiuspos.distancefloatSpBandwidth smearing corrected peak brightnessmJyphot.flux.density;em.radio.750-1500MHzfloate_Sprms uncertainty on SpmJystat.error;src.spTypefloatSIIntegrated flux density (2)mJyphot.flux.density;em.radio.750-1500MHzfloate_SIrms uncertainty on SImJystat.errorfloatThetaM? Beam deconvolved angular sizes for resolved sources (3)arcsecphys.angSizefloatnullableThetam? Beam deconvolved angular sizes for resolved sources (3)arcsecphys.angSizefloatnullablePA? Source major axis position angle, measured from North through Eastdegpos.posAngfloatnullableNotesNotes relative to the radio morphology (4)meta.notecharJ/A+A/446/97/table3Optical counterparts of the radio sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNEPCluster designation, NEP NNNNmeta.id.part;meta.mainintSrc[A-M] Source identification lettermeta.id.part;meta.maincharRAJ2000Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Declination (J2000) (1)pos.eq.dec;meta.mainORAOffset in right ascension, between optical and radio coordinatesarcsecpos.eq.ra;arith.difffloatODEOffset in declination, between optical and radio coordinatesarcsecpos.eq.dec;arith.difffloatRmag? POSS apparent red (R) magnitudemagphot.mag;em.opt.RfloatnullableBmag? POSS apparent red (B_J_) magnitudemagphot.mag;em.opt.BfloatnullableS/G[SG] Optical classification Star/Galaxy (2)meta.code.classcharz? Spectroscopically measured redshift. Typical uncertainty is <=0.001src.redshiftfloatnullableMemb[*] *: radio source is a cluster memberspect.dopplerVeloc.radio;em.radiochar