J/A+A/353/77ivo://CDS.VizieR/J/A+A/353/77doi:10.26093/cds/vizier.33530077CDSTeerikorpi P.2012-11-13T12:39:25Z2000-10-08T10:00:05ZCDS support team

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

cds-question@unistra.frquasarsvisible-astronomybroad-band-photometrypolarimetryWe use 250 radio loud quasars with UBV photometry available and z<1.65, to study whether there is a gap in the distribution of absolute magnitudes, from M_V_~-25.8 (for H_0_=100km/s/Mpc, q_0_=0.5) to -25.3, as was suggested by Teerikorpi (1981A&A....98..309T; Paper I). In Paper I it was also proposed that there is a class of the most luminous radio quasars, differing in some properties from fainter quasars on the other side of the gap. The main conclusion of Paper I remains intact. The gap in the distribution of absolute magnitudes is confirmed with the new formalism of cosmological Malmquist bias (Teerikorpi, 1998A&A...339..647T), which allows one to use heterogeneous samples with magnitude inhomogeneity.2000A&A...353...77Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/353/77CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/321/123 : Optical variability of QSOs (Cristiani+ 1997)J/A+AS/143/357 : Tuorla Quasar Monitoring (Katajainen+ 2000)J/MNRAS/260/202 : Quasar luminosity function (Hawkins+, 1993)J/MNRAS/268/305 : Variability of optically selected quasars (Hook+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/353/77https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/353/77http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/353/77https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/353/77https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/353/77http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/353/77GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/353/77/tablec1 (Basic sample (M_min_<-22.0mag))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/353/77/tablec1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/353/77/tablec1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/353/77/tablec1?GETtext/xml+votable180.050000true1.392216.16170.0055555555555555566/110 1521 2052 2247 4118 4285 4324-4325 4340 4345 4394 4436 4448 4572 4696 4822 5271 5306 5312 5345 5439 5596 5766 5806 6252-6253 6367 6379 6472 6618 7349 7488 7508 7763 8019 8205 8300 8412 8452 8466 8482 8528 8552 8631 8641 8709 8753 8758 8780 8812 8858 8927 9181 9252 9268 9632 10217 10288 10307 10337 10374 10401 10422 10432 10925 11203 11782 11813 12047 12301 12377 12604 13496 15067 16606 17011 17184 17414 17477 17485 17624 17639 17730 17827 17838 18004 18022 18088 18343 18506 18661 18670 18756 18769 18895 19190 19287 19315 19370 19398 19413 19609 19700 19895 20099 20116 20387 21126 21196 21934 21955 22452 22501 22658-22659 22754 22947 23016 23045 23099 23121 23269 24116 24661 24845 24867 25112 25264 25302 25428 25472 25580 25585 25742 25799 26036 26100 26131 26178 26195 26245 26254 26292 26297 26301 26303 26373-26374 26499 26725 26769 26922 27025 27060 27212 27238 27295 27310 27413 27423 27481 27486 27493 27514 27561 27580 27648 27755 27768 27798 27815 27857 27909 27955 28045 28083 28138 28218 28315 28479 28527 28538 28540 28581 28610 28666 31187 31211 31333 31430 31520 31857 31894 32594 32897 32948 33827 33829 34123 34210 34233 34330 34517 34571 35078 35413 35484 35528 35801 36313 37032 37056 37385 37474 38189 38725 38763 38836 39559 40265 40333 40730 43416 43461 43694 43980 44028 44043 44859 44908 44938 45006 45011 45178 45339 45409 45819 46079 46373 46459 46964 47203 47352 47542 47570 48228 48483 48591 48614 48965-48966https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/353/77?format=asciiOpticaldefaultJ/A+A/353/77/tablec1Basic sample (M_min_<-22.0mag)zRedshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA1950Right ascension (1950)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.mainMminAbsolute V magnitude at minimum brightnessmagphys.magAbs;em.opt.VfloatVcatCatalog V magnitudemagphot.mag;em.opt.VfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatDm? Variability amplitudemagsrc.var.amplitudefloatnullableVar[0-3] Variability code (1)meta.code;src.varintVminMinimum V magnitudemagphot.mag;em.opt.VfloatNoteNotes on photometry (2)meta.notecharr_VarComma-separated references for variability (3)meta.ref;pos.framecharPol? Optical polarisation%phys.polarization;em.optfloatnullablee_Pol? rms uncertainty on Pol%stat.errorfloatnullabler_PolComma-separated reference for polarisation (3)meta.ref;pos.framechar_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/A+A/353/77/refsReferences for variabilityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.maincharBibcodeBibcodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar