J/A+A/300/323ivo://CDS.VizieR/J/A+A/300/323doi:10.26093/cds/vizier.33000323CDSJAUNSEN A.O.JABLONSKI M.PETTERSEN B.R.STABELL R.2013-02-27T06:30:46Z1997-12-09T17:34:19ZCDS support team

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

cds-question@unistra.frquasarsgravitational-lensingphotometrytwo-color-diagramsspectroscopyredshiftedA gravitational lens (GL)-search program, initiated in 1990 at the Nordic Optcal Telescope (NOT), has revealed several possible GL-candidates among a sample of 168 quasars (QSOs), chosen from three lists compiled by C. Hazard, D. Reimers and J. Surdej, respectively. Some of these candidates, selected for having close companions (within 5 arcseconds), were imaged in several filters and their colours compared. Low dispersion spectra of the most promising candidates were also obtained at the NOT and ESO New Technology Telescope (NTT). None of these has proved to be strong candidates of gravitational lensing effects. We present this new sample of QSOs and combine it with previously published optical QSO samples in a statistical analysis to yield constraints on flat cosmologies and galaxy velocity dispersions.1995A&A...300..323Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/300/323CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/300/323https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/300/323http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/300/323https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/300/323https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/300/323http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/300/323GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/300/323/table1 (The complete observational list of the 168 QSOs in the NOT sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/300/323/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/300/323/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/300/323/table1?GETtext/xml+votable180.050000true0.8454709-26.05466970.0055555555555555566/171 419 515 532 566 575 659 4239 4259 4268 4273-4274 4279 4283 4313 4315 4329 4332 4339 4347 4521 4613 4693 4862 4914 4923 4997 5009 5014 5016 5090 5098 5272 5350 5395 5472 5486 5671 5753 5755 5836-5838 5844 5952 5974 6234 6252 6264 6266-6268 6434 6641 6686 6853 7707 7709 7716 7722 7730 7737 7785 7815 7847 7857-7859 8376 8523 8548 8625 8638 9112 9268 9272 9457 9459 9467 9489 9491 9496 9633 9705 9871 10084 10206 10214 10217 10333 10501 10521 10545 10629 10736 10912 10939 11370 11543 11581 11596 11603 11608 11639-11640 11723 11725 12690 12722 12886 13603 13625 13864 15300 16034 16043 16059 16269 16589 16656 17828 17849 17885 17917 18171 18417 18880 19166 19204 19315 19398 19510 19519 19536 19566 19661 19700 19723 19757 19842 20019 20099 21178 21180 22549 22576 22580 22593-22594 25932 26009 26111 27951 28039 28042 28086 28499 28580-28581 30047 31857 35772https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/300/323?format=asciiOpticaldefaultJ/A+A/300/323/table1The complete observational list of the 168 QSOs in the NOT sampleGLcSee Note (1)meta.ref;pos.frameintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintQSOQSO identification, where the first letter(s) indicates the origin: H: from Hazard, HS: from Reimers (Hamburg Sternwarte) others from the Veron cataloguemeta.idcharRA1950Right ascension 1950pos.eq.ra;meta.mainDE1950Declination 1950pos.eq.dec;meta.mainFilter[IRV] Filter typesmeta.code;instr.filtercharFWHMSeeing (FWHM)arcsecinstr.obsty.seeingfloatzRedshift z of the QSOsrc.redshiftfloatVmagV-band magnitude of the QSO as estimated from our data or tabulated in other QSO catalogues. The QSOs with no previously measured magnitude were estimated by comparing them to QSOs on other CCD frames (for a similar exposure time) These estimated magnitudmagphot.mag;em.opt.VfloatDmag[]? Magnitude difference between closest companion with weaker apparent brightness and within 5 arcsec of QSOmagphot.mag.sb;arith.difffloatnullableSep[]? Separation of closest companion with weaker apparent brightness and within 5 arcsec of QSOarcsecpos.angDistancefloatnullableNoteSee Note (2)meta.notechar_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