J/ApJS/134/35ivo://CDS.VizieR/J/ApJS/134/35doi:10.26093/cds/vizier.21340035CDSForster K.Green P.J.Aldcroft T.L.Vestergaard M.Foltz C.B.,Hewett P.C.2001-08-22T22:03:18Z2001-08-22T21:57:49ZCDS support team

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

cds-question@unistra.frquasarssurveysspectroscopyultraviolet-astronomyWe present measurements of the optical/UV emission lines for a large homogeneous sample of 993 quasars from the Large Bright Quasar Survey. Our largely automated technique accounts for continuum breaks and galactic reddening, and we perform multicomponent fits to emission line profiles, including the effects of blended iron emission, and of absorption lines both galactic and intrinsic. Here we describe the fitting algorithm and present the results of line fits to the LBQS sample, including upper limits to line equivalent widths when warranted. The distribution of measured line parameters, principally W_{lambda}_ and FWHM, are detailed for a variety of lines, including upper limits. We thus initiate a large-scale investigation of correlations between the high-energy continuum and emission lines in quasars, to be extended to complementary samples using similar techniques. High-quality, reproducible measurements of emission lines for uniformly selected samples will advance our understanding of active galaxies, especially in a new era of large surveys selected by a variety of complementary methods.2001ApJS..134...35Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/134/35CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/109/1498 : Large Bright Quasar Survey VI (LBQS) (Hewett+, 1995)J/ApJ/450/51 : ROSAT observations of LBQS (Green+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/134/35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/134/35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/134/35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/134/35https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/134/35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/134/35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVdefaultJ/ApJS/134/35/table1LBQS quasars excluded from emission line measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLBQSDesignation in LBQS (Cat. <J/AJ/109/1498>)meta.id;meta.maincharzRedshiftsrc.redshiftfloatRefReferences (1)meta.refcharNotesNotes (2)meta.notecharJ/ApJS/134/35/table5Representative emission line measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLBQSDesignation in LBQS (Cat. <J/AJ/109/1498>)meta.id;meta.maincharzRedshiftsrc.redshiftfloatLineEmission line namemeta.idcharFWHMFull width at half maximum of Linekm/sspect.line.widthintE_FWHMPositive error on FWHMkm/sstat.errorinte_FWHMNegative error on FWHMkm/sstat.errorintOffsetGaussian emission line model peak offset from the expected position (1)km/sphys.veloc;arith.diffintE_OffsetPositive error on Offsetkm/sstat.errorinte_OffsetNegative error on Offsetkm/sstat.errorintEWRest frame equivalent width of line (in {AA})0.1nmspect.line.eqWidthfloatE_EWPositive error on EW (2)0.1nmstat.errorfloate_EWNegative error on EW (2)0.1nmstat.errorfloatNumNumber of narrow absorption features used in modeling the emission lines (3)meta.numberintJ/ApJS/134/35/table6Representative continuum measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLBQSDesignation in LBQS (Cat. <J/AJ/109/1498>)meta.id;meta.maincharprimaryzRedshiftsrc.redshiftfloatNHGalGalactic neutral hydrogen column density1e+20cm**-2phys.columnDensityfloatSp+IndexPower law continuum slopespect.indexfloatE_Sp+IndexPositive error on Sp+Indexstat.errorfloate_Sp+IndexNegative error on Sp+Indexstat.errorfloatWaveNormalized rest frame wavelengthnmem.wlfloatFluxContinuum flux at Wave (in 10^-14^ergs/cm^2^/s/{AA})1e-16W.m**-2.nm**-1phot.flux.density;em.optdoubleE_FluxPositive error on Flux1e-16W.m**-2.nm**-1stat.errordoublee_FluxNegative error on Flux1e-16W.m**-2.nm**-1stat.errordoubleSp+Index2Second power law continuum slopespect.indexfloatE_Sp+Index2Positive error on Sp+Index2stat.errorfloate_Sp+Index2Negative error on Sp+Index2stat.errorfloatPolyPolynomial order required to model the blue region of the spectrumstat.fit.paramint