J/ApJS/103/331ivo://CDS.VizieR/J/ApJS/103/331doi:10.26093/cds/vizier.21030331CDSLu N.Y.Hoffman G.L.Salpeter E.E.Houck J.R.2013-02-27T06:19:50Z1998-09-27T00:33:57ZCDS support team

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

cds-question@unistra.frradio-astronomyradio-galaxiesgalaxy-classification-systemsphotometryFrom the 1.4GHz radio survey of Condon, Dickey, & Salpeter (Cat. <J/AJ/99/1071>) in a region much devoid of rich galaxy clusters at redshifts z<0.43 we selected a "distant" sample of 57 radio sources complete to a 1.4GHz flux density of 35mJy and a "nearby" sample of 36 mostly weaker radio sources which are optically brighter than B~19mag. Our ultimate goals are (1) to study the radio, optical, and near-IR properties of those high-redshift (z~1), moderate-power radio sources in the distant sample and to compare them with that of more powerful radio sources, and (2) to make a comparison of primarily noncluster radio sources in the nearby sample with a companion survey of radio sources in a pair of rich superclusters at z~0.1. In this first paper of a series, we report our new C-array VLA continuum snapshots at 4.86GHz and optical R-band CCD imaging photometry for these two samples and tabulate the observational results on individual sources. Some direct sample statistical properties are also discussed in the paper and summarized as follows: (1) The distant sample: (a) The sample median flux density at 1.4GHz is about 65mJy. (b) The majority (80%) of the sample sources have a steep spectrum between 1.4 and 4.86GHz with a spectral index around 0.9. Nineteen (90%) of the 21 sources that are fully resolved at 4.86 GHz (i.e., angular sizes {theta}>11") have a radio morphology of Fanaroff-Riley (FR) II type. (c) Thirty-seven (88%) of the 42 optically imaged sample sources were optically identified to a limiting R-band magnitude of R~23.5mag. About 15% of the identified radio sources appear to be point sources, and the others are extended galaxies with an appearance similar to nearby elliptical galaxies. (d) Twenty-eight (76%) of the optically identified sources have R>20mag, suggesting that these are probably distant (z>0.8), with a redshift distribution peaking at z~1, where their radio luminosities are about 10 times the break power between the FR I and II classes. (e) We found no strong evidence for the radio and optical axes of the resolved radio sources (i.e., {theta}>5") to be correlated or anticorrelated, nor any evidence for strong clustering around sample radio sources on average. (2) The nearby sample: except for R<15, the sample is dominated by elliptical galaxies with 16<R<18.5mag and a spectral index distribution similar to that of the distant sample. Based on the radial distribution of optical objects around each radio source, we found that the average radio source environment becomes richer from that characteristic of galaxy groups for R<17mag (z<0.2) to that of galaxy groups to clusters at R>18mag (z>0.3) .1996ApJS..103..331Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/103/331CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/99/1071 : 1.4 GHz source survey (Condon+ 1990)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/103/331https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/103/331http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/103/331https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/103/331https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/103/331http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/103/331GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/103/331/table1 (Results from the radio-continuum snapshot observations at 4.86GHz.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/103/331/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/103/331/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/103/331/table1?GETtext/xml+votable180.050000true144.876417146.48962020.005555555555555556Cone search capability for table J/ApJS/103/331/table2 (Radio properties of sample sources at 1.4 and 4.86GHz)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/103/331/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/103/331/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/103/331/table2?GETtext/xml+votable180.050000true144.875825646.48784410.0055555555555555565/1459 6/5659 5831 5835 5842 5848 5850 5857 5859 5860 5861 5862 58729.276497240453405e-25 3.220269899637266e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/103/331?format=asciiOpticalRadiodefaultJ/ApJS/103/331/table1Results from the radio-continuum snapshot observations at 4.86GHz.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharprimaryn_Name[n] n for nearmeta.notecharNote[abcd] Note on radio signal (1)meta.notecharRA1950? Right ascension (1950) (2)pos.eq.ra;meta.mainnullableDE1950? Declination (1950)pos.eq.dec;meta.mainnullablel_SmaxLimit flag on Smaxmeta.code.errorcharSmaxPeak flux densitymJyphot.flux.density;em.radio.750-1500MHzfloate_Smax? rms uncertainty on SmaxmJystat.errorfloatnullablel_S4.86GHzLimit flag on S4.86GHzmeta.code.errorcharS4.86GHzIntegrated flux density at 4.86GHzmJyphot.flux.density;em.radio.3-6GHzfloate_S4.86GHz? rms uncertainty on S4.86GHzmJystat.errorfloatnullablel_2aLimit flag on 2ameta.code.errorchar2a? Estimated major axisarcsecphys.angSizefloatnullablee_2a? rms uncertainty on 2aarcsecstat.errorfloatnullablel_2bLimit flag on 2bmeta.code.errorchar2b? Estimated minor axisarcsecphys.angSizefloatnullablee_2b? rms uncertainty on 2barcsecstat.errorfloatnullablePA? Position angle (north to east of major axis)degpos.posAngintnullablee_PA? rms uncertainty on PAdegstat.errorintnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/ApJS/103/331/table2Radio properties of sample sources at 1.4 and 4.86GHzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharprimarym_Name[AB] Multiplicity index on Namemeta.code.multipcharn_Name[a] Note on Name (1)meta.notecharSampleSample (2)meta.notecharRA1950Right ascension (1950) (3)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.mainS1.4GHzIntegreted flux density at 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzfloatl_S4.86GHzLimit flag on S4.86GHzmeta.code.errorcharS4.86GHz? Integreted flux density at 4.86GHzmJyphot.flux.density;em.radio.3-6GHzfloatnullableSI? Spectral index between 1.4 and 4.86GHzspect.index;em.radio.3-6GHzfloatnullablel_thetaLimit flag on thetameta.code.error;pos.posAngchartheta? (maximum) angular size from 4.86GHz radio maparcsecphys.angSizefloatnullablePA? Position angle (north to east) (4)degpos.posAngintnullableMorphMorphologysrc.morphchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/ApJS/103/331/table3Results from the R-Band CCD imaging photometryNameSource namemeta.id;meta.maincharprimaryTypeType (Gal or QSO)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintm_Name[AB] Multiplicity index on Namemeta.code.multipcharn_Name[abcdef] Note on Name (1)meta.notecharDateObservation datetime.epoch;obsnullableFWHMFWHM of the optical seeingarcsecinstr.obsty.seeingfloatNopt? Number of the detected optical object with R<23.5magmeta.idintnullableaSemi-major axisarcsecphys.angSize.smajAxis;src.orbitalfloatbSemi-minor axisarcsecphys.angSize.sminAxisfloatPA? Position angle (North to East)degpos.posAngintnullableoRAr? Positional offset in RA direction, from the radio position to the position of an optical identificationarcsecpos.eq.ra;arith.difffloatnullableoDEr? Positional offset in DE direction, from the radio position to the position of an optical identificationarcsecpos.eq.dec;arith.difffloatnullableoRAs? Offset in RA direction, from a nearby bright star to the optical identificationarcsecpos.eq.ra;arith.difffloatnullableoDEs? Offset in DE direction, from a nearby bright star to the optical identificationarcsecpos.eq.dec;arith.difffloatnullablel_RmagsLimit flag on Rmasmeta.code.errorcharRmags? R magnitude of the offsetting starmagphot.mag;em.opt.Rfloatnullablen_Rmag[B] B: brightmeta.notecharRmag? FOCAS-measured isophotal magnitudemagphot.mag;em.opt.RfloatnullableAiso? Isophotal areaarcsec**2phys.areaintnullable2a? Major diameter of optical identificationarcsecmeta.id;phys.angSize;em.optfloatnullable2b? Minor diameter of optical identificationarcsecmeta.id;phys.angSize;em.optfloatnullablePAo? Position angle of the optical identification (North to east)degmeta.id;pos.posAngintnullable