J/AJ/119/2540ivo://CDS.VizieR/J/AJ/119/2540doi:10.26093/cds/vizier.51192540CDSGrazian A.Cristiani S.D'Odorico V.Omizzolo A.Pizzella A.2023-04-06T16:50:37Z2002-07-20T18:18:11ZCDS support team

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

cds-question@unistra.frquasarsapparent-magnituderedshiftedThis paper presents the first results of a survey for bright quasars (V<14.5 and R<15.4) covering the northern hemisphere at Galactic latitudes |b|>30{deg}. The photometric database is derived from the Guide Star and USNO catalogs. Quasars are identified on the basis of their X-ray emission measured in the ROSAT All-Sky Survey. The surface density of quasars brighter than 15.5mag turns out to be (10+/-2)x10^-3^deg^-2^, about 3 times higher than that estimated by the Palomar-Green (PG) survey. The quasar optical luminosity function (LF) at 0.04<z<=0.3 is computed and shown to be consistent with a luminosity-dependent luminosity evolution of the type derived by La Franca & Cristiani (1997AJ....113.1517L) in the range 0.3<z<=2.2. The predictions of semianalytical models of hierarchical structure formation agree remarkably well with the present observations.2000AJ....119.2540Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/119/2540CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)I/243 : The PMM USNO-A1.0 Catalogue (Monet 1997)I/252 : The USNO-A2.0 Catalogue (Monet+ 1998)I/254 : The HST Guide Star Catalog, Version 1.2 (Lasker+ 1996)I/255 : The HST Guide Star Catalog, Version GSC-ACT (Lasker+ 1996-99)IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/119/2540https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/119/2540http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/119/2540https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/119/2540https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/119/2540http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/119/2540GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/119/2540/table2 (USNO sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/119/2540/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/119/2540/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/119/2540/table2?GETtext/xml+votable180.050000true0.46083311.2798890.005555555555555556Cone search capability for table J/AJ/119/2540/table3 (GSC sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/119/2540/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/119/2540/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/119/2540/table3?GETtext/xml+votable180.050000true0.9570832.0663610.005555555555555556Cone search capability for table J/AJ/119/2540/table4 (Other spectroscopic identifications)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/119/2540/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/119/2540/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/119/2540/table4?GETtext/xml+votable180.050000true0.04916675.38813890.0055555555555555566/546 595 778 2052 2066 2221 2562 2584 2733 4196 4215 4317 4365 4373 4387 4401 4439 4457 4463 4467 4488 4515 4540 4558 4566 4583 4708 4992 5016 5091 5119 5141 5153 5175 5179 5181 5194 5244 5267 5270 5304 5328 5343 5346 5355 5366 5375 5420 5437 5445 5461 5480 5482 5504 5507 5514 5517 5534 5624 5701 5721 5727 5731 5743 5754 5764 5767 5778 5913 5947 5950 5982 5989 6009 6018 6028 6030 6050 6057 6074 6088 6090 6092 6113 6138 6417 6494 6599 6613 6628 6647 7189 7193 7210 7216 7219-7220 7228 7235 7241 7246 7265 7277 7284-7285 7338 7371 7426-7427 7446 7476 7481 7484 7518 7526 7582 7632 7634 7639 7641 7664 7693 7744 7752 7756 7947 7963 7967 7987 7998 8017 8029 8033 8051 8069 8071 8129 8142 8215 8254 8258 8273 8299 8374 8449 8488 8508 8528-8529 8589 8606 8632 8665 8669 8695 8699 8812 8830 8845 8866 8878 8895 8906 8915 8922-8923 8945 8947-8948 8951-8952 8963 8970 9002 9005 9049 9066 9092 9099 9106 9145 9152 9168 9174 9196 9245 9261-9262 9272 9317 9344 9363 9379 9397-9398 9422 9432 9447 9452 9456-9457 9473 9481 9483 9490 9504 9509 9519 9611-9613 9664 9694 9723 9726 9747 9750 9784 9790 9796 9809 9811-9812 9821 9832 9860 9892 9897 9902 9920 9925-9926 9955 10020 10033 10055 10108 10138 10188 10219 10265 10269 10314 10336 10340 10358 10381 10389 10430 10435 10437 10442 10472 10475 10484 10522 10539 10543 10575 10578 10592 10619 10630 10662 10691 10694-10695 10707 10761 10766 10774 10788-10789 10800 10802 10828 10840-10841 10877 10881 10944 10949-10951 10955 10965 10969 10995 11021 11032 11080 11103-11104 11125-11126 11198 11204 11208 11212 11253 11268 11291 11314 11319 11362 11383 11388 11391-11392 11402 11455 11466 11473 11533 11614 11653 11657 11671 11676 11706 11749 11754 11764 11781 11816-11818 11898 11901 11917 11936 11944 11961 11963 11971 11995 12000 12025 12033 12092 12102 12133 12145 12169 12189 12199 12209 12633 17830 17840 17843 17845-17846 18009 18141 18154 18246 18270 18344 18800 18807 18879 18923 19144 19283 19314 19366 19370 19451 19462 19489 19504 19519 19564 19567 19593 19610 19625 19633 19651 19662 19673 19690 19716 19738 19746 19761 19767 19777 19797 19831 19909 19949 19983 20016 20026 20031 20095-20096 20177 20201-20202 20257 20262 20265 20309 20315 20333 25965 26015 26022 26041 26046 26092 26239 26291-26292 26300 26346 26350 26469 26509 26539 26551 26565 26615 26972 26998 27004-27005 27053 27074 27246 27293 27314 27340 27359 27436 27456 27477 27547 27654 27677 27679 27682 27689 27720 27722 27731 27736 27760 27762 27795 27819 27824 27858 27862 27976 28021 28060 28115 28139 28148 28153 28162 28164 28195 28260 28265 28269 28278 28339 28346 28360 28369 28453 28485 28510 28512 28517 28533-28534 28552 28571 28622 31416 31430 31535 31650-31651 31663 31680 32438 32444 32472 32485 32696https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/119/2540?format=asciiOpticaldefaultJ/AJ/119/2540/table2USNO samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint1RXSSource designationmeta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainRmagUSNO R magnitudemagphot.mag;em.opt.RfloatVmag? GSC V magnitudemagphot.mag;em.opt.Vfloatnullablez? Redshiftsrc.redshiftfloatnullableTypeType of source (G1)src.classcharJ/AJ/119/2540/table3GSC samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint1RXSSource designationmeta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainVmagGSC V magnitudemagphot.mag;em.opt.Vfloatz? Redshiftsrc.redshiftfloatnullableTypeType (G1)src.classcharJ/AJ/119/2540/table4Other spectroscopic identifications1RXSSource designationmeta.id;meta.maincharz? Redshiftsrc.redshiftfloatnullableu_zUncertainty flag on zmeta.code.errorcharTypeType (G1)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainBjmagB_j_ magnitudemagsrc.classfloat