J/MNRAS/247/182ivo://CDS.VizieR/J/MNRAS/247/182doi:10.26093/cds/vizier.72470182CDSBEAUCHEMIN. M.BORRA. E.F.EDWARDS G.2013-03-04T07:05:34Z1997-12-09T21:35:09ZCDS support team

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

cds-question@unistra.frquasarsspectroscopyThis paper gives a list of all quasar candidates obtained from an automated computer search performed on 11 grens plates. The description of the main characteristics of the survey is given along with the latest improvements in the selection techniques. Particular attention has been paid to understanding and quantifying selection effects. This allows the construction of homogeneous samples having well-understood characteristics. The noteworthy aspect of our homogenization process is the correction that we apply to our probability classes in order to take into account the signal-to-noise differences; at a given magnitude, among plates of different limiting magnitudes. Since such homogeneous material is rare, this catalogue is of general interest. Each grens plate covers about 1 square degree with typical limiting magnitude of B~21. Data are given with all relevant quantities needed to understand the characteristics of the survey. We expect that over 100 of the 125 higher probability class candidates are quasars. A third of the ~400 lower probability objects should also be quasars. This material is well-suited to follow-up spectroscopy with fibre spectrographs.1990MNRAS.247..182Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/247/182CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/247/182https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/247/182http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/247/182https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/247/182https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/247/182http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/247/182GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/247/182/table5 (Catalogue of quasar candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/247/182/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/247/182/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/247/182/table5?GETtext/xml+votable180.050000true197.979959-13.59000820.0055555555555555565/2141 2595 12241 6/8563 8569 8572 10374 10375 10394 10395 10405 10416 10417 24950 24951 24956 24957 25632 25634 25642 25643 25729 48619 48622 48961 489631.398457827073138e-19 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/247/182?format=asciiOpticaldefaultJ/MNRAS/247/182/table5Catalogue of quasar candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField namemeta.id.part;meta.maincharIdGrens reference number inside the fieldmeta.id.part;meta.mainintRA1950Right ascension 1950pos.eq.ra;meta.mainDE1950Declination 1950pos.eq.dec;meta.mainu_DE1950[* ] Uncertainty flag on DE (1)meta.code.error;pos.eq.deccharJmagJ magnitudemagphot.mag;em.IR.JfloatPrClassProbability class (2)meta.code.class;stat.probabilityintgb-gvgb-gv grens colour indexmagphot.color;em.opt.B;em.opt.Vfloatgu-gbgu-gb grens colour indexmagphot.color;em.opt.U;em.opt.BfloatDmsDistance of the candidate from the nominal locus of the main sequence of stars (3)stat.fit.paramintSampleSample membership of the candidatemeta.code.membercharEmLineWavelength of the emission lines detected on grens plates for the highest probability classes candidates PC10.1nmem.wlcharType[QS] Object type of some candidates (4)src.classcharz[]? Emmision line redshift confirmed by slit spectroscopysrc.redshiftfloatnullable_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.decnullableindexed