J/MNRAS/522/2019ivo://CDS.VizieR/J/MNRAS/522/2019CDSCristiani S.Porru M.Guarneri F.Calderone G.Boutsia K.Grazian A.,Cupani G.D'Odorico V.Fontanot F.Martins C.J.A.P.Marques C.M.J.,Maitra S.Trost A.2026-09-03T13:54:36Z2026-09-03T14:52:04ZCDS support team

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

cds-question@unistra.frsurveysquasarsredshiftedvisible-astronomyastrometryspectroscopyThe QUBRICS (QUasars as BRIght beacons for Cosmology in the Southern hemisphere) survey aims at constructing a sample of the brightest quasars with z~>2.5, observable with facilities in the Southern Hemisphere. QUBRICS makes use of the available optical and IR wide-field surveys in the South and of Machine Learning techniques to produce thousands of bright quasar candidates of which only a few hundred have been confirmed with follow-up spectroscopy. Taking advantage of the recent Gaia Data Release 3, which contains 220 million low-resolution spectra, and of a newly developed spectral energy distribution fitting technique, designed to combine the photometric information with the Gaia spectroscopy, it has been possible to measure 1672 new secure redshifts of QUBRICS candidates, with a typical uncertainty of {sigma}z = 0.02. This significant progress of QUBRICS brings it closer to (one of) its primary goals: providing a sample of bright quasars at redshift 2.5 < z < 5 to perform the Sandage test of the cosmological redshift drift. A Golden Sample of seven quasars is presented that makes it possible to carry out this experiment in about 1500 h of observation in 25 yr, using the ANDES spectrograph at the 39m ELT, a significant improvement with respect to previous estimates.2023MNRAS.522.2019Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/522/2019CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/511/572 : High-redshift Ultraluminous QSOs with SMSS DR3J/MNRAS/482/3458 : UVES Spectral Quasar Absorption Database DR1 (Murphy+,2019)J/ApJ/887/268 : Bright QSOs in Southern Hemisphere (QUBRICS)J/ApJ/871/258 : ELQS in SDSS. III. The full ELQS quasar catalogJ/ApJ/829/33 : Luminous of high-z QSOs with SDSS and WISE. II (Yang+,2016)J/ApJS/250/26 : Spectroscopic follow-up of the QUBRICS quasarsJ/ApJS/243/5 : The ELQS in the PS1 footprint (PS-ELQS) (Schindler+, 2019)J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)J/other/PASA/30.4 : Corrections to the VV13 Catalogue (Flesch, 2013)VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q)VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)VII/258 : Quasars and Active Galactic Nuclei (13th Ed.)VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS)VII/233 : 2MASS All-Sky Extended Source Catalog (XSC)II/359 : The VISTA Hemisphere Survey (VHS) catalog DR4.1II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1I/350 : Gaia EDR3 (Gaia Collaboration, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/522/2019https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/522/2019http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/522/2019https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/522/2019https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/522/2019http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/522/2019GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/522/2019/table (QUBRICS candidates with a new reliable spectroscopic identification derived from Gaia low-resolution spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/522/2019/table?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/522/2019/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/522/2019/table?GETtext/xml+votable180.050000true0.349625-58.95616670.0055555555555555566/22 25 30 51 92 104 136 170 174 176 180 190 224 228 516 530-531 537 552 4109 4119 4156 4199 4246 4273 4302 4323 4368 8287 8299 8332 8450 8742 12294 12296 12314 12355 12415 12559 12582 16406 16408 16411 16425-16426 16449 16454 16477 16482 16496 16498 16508 16514 16525 16555-16556 16600 16606 16610 16613 16662 16667 16671 16690-16691 16697 16705 16725 16729 16733 16744 16747 16750 16752-16754 16763 16789 16792 16800 16811 16818 16825 16834 16837 16840 16849 16851 16858 16887 16889-16890 16904 16909 16926 16949 16994-16995 17003 17005 17016 17033 17063 17131 17140 17143 17159-17160 17183 17228 17234 17244 17343 17415-17416 17418 17425-17426 17443 17454-17455 17465 17468 17475-17476 17481 17485 17488 17494 17496 17536 17541-17543 17545 17563 17577 17591 17604 17637 17679 17682 17717 17921 17928 17948 17957 18110 18130 18210 18243 18257 18261 18273 18284 18307 18316-18317 18322 18326 18330 18346 18354 18362 18377 18401-18402 18432 18436 18443 18490 18558 18562 18568 18593 18600 18602 18606 18623 18656 18660 18665 18671 18688 18733 18817 18913 18951 18958 18968-18969 18973 18980 18986 19016 19063 19067 19076 19088 19119 19149 19261 19329 19540 19603 19668 19682 19989 20010 20513 20524 20526 20538 20614-20615 20630 20660 20712 20995 21003 21006 21023 21031 21034 21038 21044-21046 21050 21070 21096 21100 21114 21134 21138 21147 21151 21153-21154 21159 21161 21163 21168 21170 21180 21182-21184 21188 21193 21203 21208 21233 21245-21246 21843 21845 22539 22542 22551 22554 22566-22567 22578 22580 22587 22591 22593 22595 22600 22603 22608-22609 22618 22621 22623-22624 22637 22648 22651-22652 22655 22657 22667 22672 22674 22703 22713 22723 22730 22735 22743-22744 22747 22753-22755 22757 22759 22775 22778 22828 22912 22928 22944 22946 22948 22955 22957 22959 22963 22970 22972 23064 23071 23099 23109 23120 23132 23160 23162 23174-23175 23177 23180-23181 23234 23263 23275 23282 23293 23313 23315 23355 23429 23432 23438 23457 24640 24677 24683 24685 24699 24722 24725 24728 24730-24732 24734 24743 24750 24776 24786 24788 24818 24824 24827-24829 24835 24840-24841 24851 24858 24864-24865 24879 24883-24884 24894 24899 24909 24914-24915 24920 24925 24927 24946 24963 24970-24971 24985 24988 24997 25017 25036 25041-25042 25045 25049-25050 25056 25058 25080 25085 25111 25116 25129 25138 25153 25158-25159 25168 25179 25184 25193-25194 25199 25202 25207-25209 25221-25223 25225 25230 25245 25247 25251 25253 25256 25270 25274 25282-25283 25287 25292 25298-25299 25336 25357-25362 25367 25371 25378 25382 25384-25386 25392 25394 25396-25397 25407 25410 25419 25426 25432 25435 25457-25459 25471 25473 25475 25535 25537 25544 25552 25557 25560-25561 25618 25620-25621 25623 25633-25634 25652 25659 25663-25664 25671 25673 25677-25679 25691 25703-25704 25725 25727 25744-25745 25751 25753 25756 25758 25760 25767 25782 25796 25811 25827-25828 25833 25838 25862-25863 25891 25904-25905 25930 25934 25984 26041 26064 26084 26101 26107-26108 26123 26126 26133-26135 26140-26141 26147 26153 26155 26176 26192 26235 26242 26252 26288 26327 26331 26345 26395 26442 26509 26544 26550 26636 26667 26679 26715 26732 26737 26761 26764 26766 26772 26790 26792 26835 26899 26906 26915 26920 27054 27156 27160 27169 27174 27192 27201 27223 27262 27264 27288 27307 27310 27325 27343 27556 27714 30017 30020 30033 30035 30041 30851 30853 30862 30869 30959 31136 31140 31155 31200 31212 31218 31225-31226 31252 31300 31306 31315-31316 31324 31326-31327 31333 31341 31343 31345 31348 31354 31356 31388 31405 31489 31494-31495 31502 31524 31539 31557-31558 31565-31566 31571-31572 31575-31576 31580 31582 31585 31589 31592 31600 31608 31644 31685 31689 31700 32267 32281-32282 32288 32290 32292-32293 32790 32840 32899 32919 32923 32962 33016 33021 33057 33067 33133 33204 33244 33274 33285 33291 33310 33341 33356 33362 33391 33399 33415 33418 33434 33436 33459-33461 33463 33465 33468 33484 33507 33522-33523 33533 33545 33561 33565 33567 33575 33579 33584 33587 33593 33609 33613 33622 33634 33643 33659 33673 33688 33691 33703 33705 33709 33711 33713 33728 33742 33746-33748 33750 33757-33758 33766 33772 33778 33783-33784 33790-33791 33836 33861 33875 33885 33887 33893 33906-33907 33909 33915 33928 33955-33956 33970 33974 33980-33981 33983 34008 34011 34015 34023 34025 34035 34037 34039 34041 34047 34055 34066 34072 34074-34075 34085 34087 34090 34097 34109 34117 34125 34162 34186 34191 34195 34200 34204 34207 34210 34234 34239 34245 34248 34271 34276 34280 34284 34289 34306 34328 34338 34349 34369 34378 34402 34405 34412 34420 34431 34438 34459 34467 34489 34505 34507 34520 34524 34531 34538 34546-34547 34553 34556 34562 34570 34594 34604 34612 34615 34627 34632 34639 34648 34654 34662 34675 34691 34703 34709 34713-34714 34725-34726 34736 34740 34743 34754 34757 34760 34762 34772-34773 34779 34783 34793 34798-34799 34802-34803 34821 34825 34834 34844 34851 34855 34858 34862 34865 34874 34915 34917 34934 34940 34943-34944 34946 34959 34965 34973 34999-35000 35006 35020-35021 35025 35029 35031 35033-35036 35042 35062 35067 35071 35081 35087 35092 35096 35106 35109 35113 35115 35117 35121-35122 35132-35133 35139 35144-35145 35155 35162 35171 35200 35202 35209 35245 35249 35253 35263 35269 35277 35289 35295-35296 35298 35304 35317 35330 35333 35368 35371 35373 35380 35392 35395 35397-35398 35404 35415 35420 35423 35442 35452-35454 35456 35506 35513-35514 35518 35528 35531 35538 35540 35549 35551 35565 35584 35591-35592 35595 35603-35604 35610-35611 35614 35621 35623 35628 35633 35640 35643 35646 35648 35661 35673 35677 35681 35693 35696 35705 35708-35709 35766 35780-35781 35792 35801 35803 35805 35807 35809 35812 35818 35825 35838-35839 35857 35861-35862 35868 35879 35883 35888 35904 35907 35909-35910 35916 35930 35933 35948 35951 35976 35993-35994 36004 36023 36029-36030 36035 36039 36042 36044-36045 36054 36056 36058 36062 36064 36066 36070-36071 36076-36077 36084 36088-36089 36101-36102 36105 36107 36110 36114 36120 36128 36136-36137 36139 36143 36145 36154 36156 36160 36162-36164 36168 36171-36172 36174 36178 36180 36188 36193 36198 36210 36221 36230-36231 36238 36240 36242 36244-36245 36249 36268-36269 36284 36298 36304 36311-36313 36334 36341 36344 36346 36362 36377-36378 36386 36389-36390 36397 36400 36402 36406 36410-36411 36423 36431 36433 36441 36445 36451 36455 36457 36459 36462 36471 36476 36480 36499-36500 36514 36528 36530 36537-36538 36547-36549 36558-36559 36563 36568 36578 36589 36601 36610 36614 36643 36651 36653 36669 36674 36700 36713 36725 36732 36737 36742 36744 36746 36777 36813 36822 36876 37001 37381 37513 38365 38398 38749-38750 38757 38764 38773 38854-38855 38865 38869 38872 38874 38877 38885 38898 38905 39049 39054 39073 39076 39435 39458 39466 39585 40260 40276 40290 40294-40295 40300 40386 40388 40390 40409 40444 40446 40771-40774 40780 40793 40818 40826 40830 40903 40913 40915-40916 40921 40923 40927 40933 40944 40980 43883 43887 43895 43898 43930 43932 43935 43956 43969 43974 43977 43982 44003 44007 44010 44015 44020-44021 44027 44030-44031 44201 44220 44227 44261 44268 44273 44281 44418 44423 44431 44444-44445 44459 44483 44491 44507 44526 44538 44548 44557 44563 44566-44567 44573 44599 44603 44608 44623 44631 44647 44659 44663 44696 44709 44712 44728 44751 44782 44788 44804 44815 44832 44839 44843 44899 44904 44925 44927 44943 44946 44950 44953 44961 44994 45028 45030 45037-45038 45040 45044 45094 45217 45273 45284 45365 45397 45403 45406 45433 45446 45448 45453 45487 45507 45513 45522 45547 45562-45563 45566-45567 45630 45676 45687 45712 45788-45789 45794-45795 45805 45837 45849 45877-45878 45880 45883 45888 45898 45904 45907 45910 45917 45920 45936 45944 45950 45962 45978 45989 45992 45995 45998-45999 46007 46016 46020 46029 46037 46056 46070 46072 46080 46082 46087 46089 46098 46102 46105 46111 46116 46128 46130 46143 46145 46161 46165 46168 46171-46172 46177 46181-46182 46188 46196 46200 46204 46208 46215 46224 46234 46247 46252 46258 46267-46268 46282 46292 46295 46303-46304 46310 46313 46330 46333 46342 46352 46362 46377 46379 46388-46390 46402 46413 46417 46427 46434 46448-46449 46464 46466 46479 46483 46499 46520 46529 46554 46569 46594 46608 46633 46644 46652 46661 46670 46682 46696 46700 46715 46740 46746 46748 46753-46754 46757 46764 46768 46786 46801 46848 46896 46951 46959 46961 47030 47038 47051-47053 47058 47080 47083 47088-47089 47207 47360 47372 47404 47441 47444 47463 47471 47570 47587 47940 47965 47967 47997 48198 48211 48214 48217 48219 48239-48240 48244 48251-48252 48257 48279 48293 48297 48301 48310 48317 48331 48338 48343-48344 48350 48352 48359 48368 48376 48380 48387 48391-48392 48394 48398 48401 48408-48409 48412-48413 48415-48416 48418 48426-48427 48430-48431 48443 48452 48463 48465 48478 48480 48482 48499 48509 48516 48521 48538 48540-48542 48544 48548 48551 48555 48560-48561 48569 48578 48588 48599 48609-48611 48616-48617 48623 48627 48640 48656 48673-48674 48679 48689 48708 48713 48719 48721 48723 48725 48727 48732 48734 48739 48758 48762-48763 48832 48845 48848 48860 48863 48897 48901 48918 48926 48949 48951-48952 48976 48985 48988 48995 49015 49017 49032 49034 49046 49053 49062 49072 49098 49126-49127 49135 49140https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/522/2019?format=asciiOpticaldefaultJ/MNRAS/522/2019/tableQUBRICS candidates with a new reliable spectroscopic identification derived from Gaia low-resolution spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentifier quasar number of Qubrics database (qid)meta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainimagThe i apparent magnitude in AB photometric system and uncertainties represent 68% confidence intervals(ipsf)magphot.mag;em.opt.IfloatzThe redshift derived from low-resolution Gaia spectra combined with photometric data as described in section 3 (zQU_G) (1)src.redshiftfloatClassObject class as QSO for all sources in this sample (Class)meta.code.classcharzsp? Spectroscopic redshift obtained with follow-up spectroscopy (zspec)src.redshiftfloatnullableObsDateObservation date of follow-up spectroscopy (Obs_date)time.epoch;obsnullableInstSpectroscopic instrument used as DOLORES 13 times, EFOSC2 3 times and LDSS3 9 times (Instrument)instr.setupcharphotDisplay the ancilliary photometric catalogsmeta.ref.urlcharGaiaDisplay the ancilliary Gaia datameta.ref.urlcharQUBRICSDisplay the completeness of the QUBRICS Survey of Porru et al. 2026A&A...708A.363P, Cat. J/A+A/708/A363 and complementary catalog datameta.ref.urlchar