J/ApJ/729/87ivo://CDS.VizieR/J/ApJ/729/87doi:10.26093/cds/vizier.17290087CDSCooksey K.L.Prochaska J.X.Thom C.Chen H.-W.2018-01-02T13:43:15Z2012-10-25T10:27:17ZCDS support team

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

cds-question@unistra.frspectroscopyultraviolet-astronomyquasarsredshiftedline-intensitiesWe identified 24 SiIV absorption systems with z<~1 from a blind survey of 49 low-redshift quasars with archival Hubble Space Telescope ultraviolet spectra. We relied solely on the characteristic wavelength separation of the doublet to automatically detect candidates. After visual inspection, we defined a sample of 20 definite (group G=1) and 4 "highly likely" (G=2) doublets with rest equivalent widths W_r_ for both lines detected at >=3{sigma}_W_r__.2011ApJ...729...87Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/729/87CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/401/2715 : CIV column densities in z<2.5 QSOs (D'odorico+, 2010)J/ApJ/708/868 : CIV candidates (Cooksey+, 2010)J/ApJ/702/1472 : Column densities for HI, AlIII, SiIV, CIV, OVI (Savage+,J/ApJ/679/194 : Low-z intergalactic medium. III. (Danforth+, 2008)J/ApJ/676/262 : PKS1302-102 intergalactic absorption system (Cooksey+, 2008)J/ApJS/155/351 : Absorption toward PG 1116+215 (Sembach+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/729/87https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/729/87http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/729/87https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/729/87https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/729/87http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/729/87GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/729/87/qsos (List of targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/729/87/qsos?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/729/87/qsos?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/729/87/qsos?GETtext/xml+votable180.050000true166.057833376.98283330.0055555555555555566/4850 5262 5731 6576 7424 7642 7859 8017 8922 9457 9705 10217 10298 10578 10807 10912 10927 10940 11217 11596 11668 11723 11898 12025 15351 17730 18601 19283 19807 19883 21126 22659 25302 25742 25965 26148 26270 26292 27720 27862 27964 28356 32961 34107 35180 35741 47014 49042https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/729/87?format=asciiUVOpticaldefaultJ/ApJ/729/87/table1SiIV candidates summary (48 targets)NameTarget name (G3)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintz[0.002/2.736] Target redshiftsrc.redshiftfloatz1393? SiIV 1393 candidate redshiftsrc.redshift;pos.heliocentricdoublenullabledvabs? SiIV 1402 candidate velocity differencekm/sphys.veloc;arith.difffloatnullablelam.rTransition rest wavelength; in Angstroms0.1nmem.wlfloatlam.loLower absorption line boundary; in Angstroms0.1nmem.wlfloatlam.hiUpper absorption line boundary; in Angstroms0.1nmem.wlfloatl_EWrThe 2{sigma} limit flag on EWrmeta.code.errorcharEWrRest equivalent width; in milliAngstroms1e-13mspect.line.eqWidthinte_EWr? The 1{sigma} uncertainty in EWr1e-13mstat.errorintnullablel_logNThe 2{sigma} limit flag on logNmeta.code.errorcharlogNLog column density (1)log(cm**-2)phys.columnDensityfloatf_logN[ab] Flag on logN (G2)meta.codechare_logN? The 1{sigma} uncertainty in logNlog(cm**-2)stat.errorfloatnullableG[1/2]? Doublet flag (only for table 2) (G1)meta.code.errorintnullableFlag[79/511]? Binary flagmeta.code.errorintnullableJ/ApJ/729/87/table2SiIV systems summary (16 targets)NameTarget name (G3)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintz[0.002/2.736] Target redshiftsrc.redshiftfloatz1393? SiIV 1393 candidate redshiftsrc.redshift;pos.heliocentricdoublenullabledvabs? SiIV 1402 candidate velocity differencekm/sphys.veloc;arith.difffloatnullablelam.rTransition rest wavelength; in Angstroms0.1nmem.wlfloatlam.loLower absorption line boundary; in Angstroms0.1nmem.wlfloatlam.hiUpper absorption line boundary; in Angstroms0.1nmem.wlfloatl_EWrThe 2{sigma} limit flag on EWrmeta.code.errorcharEWrRest equivalent width; in milliAngstroms1e-13mspect.line.eqWidthinte_EWr? The 1{sigma} uncertainty in EWr1e-13mstat.errorintnullablel_logNThe 2{sigma} limit flag on logNmeta.code.errorcharlogNLog column density (1)log(cm**-2)phys.columnDensityfloatf_logN[ab] Flag on logN (G2)meta.codechare_logN? The 1{sigma} uncertainty in logNlog(cm**-2)stat.errorfloatnullableG[1/2]? Doublet flag (only for table 2) (G1)meta.code.errorintnullableFlag[79/511]? Binary flagmeta.code.errorintnullableJ/ApJ/729/87/table3SiIV doublets summary (16 targets)NameTarget namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintG[1/2] Doublets group (G1)meta.codeintz1393[0.004/1.148] Redshift at 1393src.redshift;pos.heliocentricdoublel_Wr1393Limit flag on Wr1393 (1)meta.code.errorcharWr1393SiIV 1393 rest equivalent width in m{AA} (1)0.1pmspect.line.eqWidthinte_Wr1393? Wr1393 uncertainty0.1pmstat.errorintnullablel_Wr1402Limit flag on Wr1402 (1)meta.code.errorcharWr1402SiIV 1402 rest equivalent width in m{AA} (1)0.1pmspect.line.eqWidthinte_Wr1402? Wr1402 uncertainty0.1pmstat.errorintnullablel_logN1393Limit flag on logN1393 (1)meta.code.errorcharlogN1393SiIV 1393 column density (1)phys.columnDensityfloatf_logN1393[ab] Flag on logN1393 (G2)meta.codechare_logN1393? logN1393 uncertaintystat.errorfloatnullablel_logN1402Limit flag on logN1402 (1)meta.code.errorcharlogN1402SiIV 1402 column density (1)phys.columnDensityfloatf_logN1402[ab] Flag on logN4023 (G2)meta.codechare_logN1402? logN1402 uncertaintystat.errorfloatnullablel_logNSiLimit flag on logNSi (1)meta.code.errorcharlogNSi[12.68/14.4] Adopted Si^+3^ doublet column density (1)phys.columnDensityfloatlogNSi2? Second value of Si^+3^ column densityphys.columnDensityfloatnullablee_logNSi? logNSi uncertaintystat.errorfloatnullableJ/ApJ/729/87/qsosList of targetsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget name (G3)meta.id;meta.maincharprimarySSimbad column added by the CDSmeta.ref.urlcharRAJ2000Simbad hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad degree of declination (J2000)pos.eq.dec;meta.mainC10Display the CIV data from Cooksey et al. 2010, Cat. J/ApJ/708/868meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar