Radio High-Redshift Quasar Catalog, RHzQCat-I J/other/Univ/11. ivo://CDS.VizieR/J/other/Univ/11.392 CDS Zhang Y. Lin R. Perger K. Frey S. An T. Ji X. Wu Q. Liao S. 2026-03-02T06:25:50Z 2026-01-09T12:46:45Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr radio-sources active-galactic-nuclei redshifted Radio-loud high-redshift quasars (RHRQs) provide crucial insights into the evolution of relativistic jets and their connection to the growth of supermassive black holes. Beyond the extensively studied population at z>~5, the cosmic morning epoch (3<~z<~5) marks the peak of active galactic nucleus (AGN) activity and black hole accretion, yet remains relatively unexplored. In this work, we compiled the radio high-redshift quasar catalog (RHzQCat) by cross-matching the SDSS DR16Q catalog with four major radio surveys FIRST,NVSS, RACS, and GLEAM. Our tier-based cross- matching framework and visual validation ensured reliable source identification across surveys with diverse beam sizes. The catalog included 1629 reliable and 315 candidate RHRQs, with radio luminosities uniformly spanning 10^25.5^-10^29.3^W/Hz. About 95% of the confirmed sources exhibited compact morphologies, consistent with Doppler-boosted or young AGN populations at high redshifts. Our catalog increases the number of known RHRQs at z>=3 by an order of magnitude, representing the largest and most homogeneous catalog of radio quasars at cosmic morning, filling the observational gap between the early (z>6) and local Universe. It provides a robust reference for future statistical studies of jet evolution, AGN feedback, and cosmic magnetism with next-generation facilities such as the Square Kilometer Array (SKA). 2025Univ...11..392Z https://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/Univ/11.392 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to V/154 : Sloan Digital Sky Surveys (SDSS), Release 16, DR16 (Ahumada+, 2020) VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015) VIII/100 : GaLactic & Extragalactic All-sky MWA survey (Hurley-Walker+, 2016) J/other/PASA/38.58 : Rapid ASKAP Continuum Survey. II. RACS cat. (Hale+, 2021) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/Univ/11.392 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/Univ/11.392 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/Univ/11.392 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/Univ/11.392 https://vizier.iucaa.in/viz-bin/votable?-source=J/other/Univ/11.392 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/Univ/11.392 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/other/Univ/11.392/category (Category information of the sources) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/Univ/11.392/category? https://vizier.iucaa.in/viz-bin/conesearch/J/other/Univ/11.392/category? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/Univ/11.392/category? GET text/xml+votable 180.0 50000 true 0.07218852 -4.75066126 0.005555555555555556 Cone search capability for table J/other/Univ/11.392/param (Radio observation from surveys) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/Univ/11.392/param? https://vizier.iucaa.in/viz-bin/conesearch/J/other/Univ/11.392/param? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/Univ/11.392/param? GET text/xml+votable 180.0 50000 true 0.07218852 -4.75066126 0.005555555555555556 5/1180 2600 4714 4755 6492 6/0 9 15 34 643-644 652-653 676 692 695 697 736 738 742 747 751 2066 2069 2074 2085-2086 2088 2094 2112 2118 2186 2188 2194 2206 2211 2233 2240 2246 2249 2574 2578 4097 4100 4102 4113-4115 4117-4118 4120 4139 4148 4154 4158 4164-4166 4168 4173-4174 4177 4180 4186 4191 4200 4211 4217 4229 4235 4238 4247 4253-4254 4261 4263 4267 4276 4284 4288-4290 4296 4303 4305 4308 4313 4318 4321 4326 4333 4347-4348 4361 4367-4368 4372 4374 4380 4387-4388 4391 4399-4400 4402 4405 4407 4413 4422 4428 4438 4441-4442 4446 4453 4464 4482-4483 4487-4488 4495 4497-4498 4500 4504-4506 4518 4523-4524 4528 4533 4537 4541 4558 4563 4568 4578 4585 4588 4591-4592 4594-4595 4597 4600 4604 4608 4612 4614-4617 4622 4624 4638 4641 4652 4654 4659 4670 4677-4678 4686 4689 4692 4694 4700 4702 4724-4726 4733-4734 4741 4749-4750 4758 4763 4767 4773 4784 4788 4792 4797 4799-4800 4805-4806 4812 4818 4827 4830 4832 4841 4845 4851 4853 4855-4856 4861 4865 4867 4875-4876 4883 4886 4894-4895 4899 4901-4902 4904 4909 4911-4913 4915 4917 4920 4924 4931 4934-4935 4943 4945 4947-4948 4950 4954-4955 4965 4967 4971 4973 4976 4981 4985 4991-4992 4995 5007 5018 5026 5028 5047-5048 5053 5055 5057 5060 5086 5091 5094 5099 5105-5106 5108 5110-5111 5115 5117 5119 5121 5130 5132-5133 5135 5139-5140 5142 5146-5148 5151 5153 5156 5169-5170 5172 5176 5179 5182 5184-5185 5190 5194 5197-5199 5201 5207 5220-5221 5226 5229 5246 5253 5258-5259 5261 5265-5267 5270 5272 5275-5276 5278 5280 5284 5290 5292 5298 5301 5306 5309 5313 5328 5330 5337 5340 5346 5349 5352 5362 5364 5372 5384 5387 5392 5394-5395 5397 5401 5416 5419 5432 5441 5443-5444 5448 5454 5458 5464 5466 5468 5470 5476 5481 5488 5491 5493 5502 5506 5512 5520 5524 5527 5529 5531 5533 5538 5543 5546-5547 5550 5563 5567 5572 5578 5583 5587-5588 5593 5599 5601-5602 5605-5606 5611-5612 5617 5620 5624 5630 5633 5638 5655 5659-5660 5663-5664 5668 5678 5683 5687 5690-5691 5696 5705 5707 5709 5714 5718 5725 5744 5748 5756 5761 5766 5772 5779 5785 5788 5801 5805 5808-5809 5815 5820 5834 5838 5841 5850 5852-5854 5867 5871 5875 5880 5890-5892 5894 5903 5913 5915 5917-5918 5935-5937 5939 5944 5954 5975 5978 5982 5986 5992 5997 6003 6017 6023-6024 6039 6043 6045 6052 6055 6069-6071 6075 6078 6085 6089 6094 6096 6105-6106 6119 6121 6129 6131 6149 6151 6161-6162 6167 6171 6173-6174 6192 6206 6211 6214 6217 6219-6220 6226 6232 6242-6243 6251 6254 6258 6264-6265 6357-6358 6372 6398 6402 6406 6410 6414-6415 6428 6444 6457 6464 6467 6469 6477 6487 6505 6512 6525 6530-6531 6535 6556 6559 6563 6565 6567 6572 6576 6582 6589 6591 6595 6597 6601 6605 6615-6617 6619 6627-6628 6638 6912-6913 7168 7175 7183 7193 7199 7206 7208 7216 7219 7222 7225 7229 7234 7236-7237 7248 7254 7258 7268 7272 7282 7287 7301 7306-7308 7314 7320-7321 7333 7350 7352 7355 7364-7365 7376 7378 7381 7385 7391 7397-7398 7400 7415 7436 7442-7444 7447 7458-7460 7467 7478-7479 7488-7489 7494 7501 7517 7522 7529 7552 7593 8196 8202 8204 8206-8207 8214 8218 8222 8229 8245 8255-8256 8261-8262 8266 8275 8285 8289 8307 8314-8315 8319 8326 8330-8331 8333 8343 8345 8360 8368 8394 8397 8416 8421 8424 8431-8432 8437 8440 8444 8447 8464-8465 8472 8515 8517 8522 8525-8527 8530 8550 8561 8563 8572 8575 8588-8590 8597-8598 8604 8613 8622 8626-8627 8656 8662 8671 8673 8682 8688 8693-8694 8699 8707-8708 8710-8711 8720 8722 8726-8727 8729 8735 8738 8753 8758 8763 8773 8775-8777 8790 8795 8815 8828-8829 8836-8837 8839 8841 8843 8845 8850 8864 8869-8870 8894-8895 8901 8903 8914-8917 8922 8929 8933 8936 8948 8969 8982 8984 8988 9003-9004 9009 9019-9020 9027 9029 9039 9047 9050 9054 9058 9073 9080 9107 9119 9130 9135 9155-9156 9158 9160-9161 9165 9170 9173 9186 9189 9194 9202 9210 9219 9228-9230 9242-9243 9246 9260 9269 9272 9281 9289-9290 9293 9303 9308-9309 9317 9325 9334 9351 9353 9360 9371-9372 9396 9398 9413 9435 9441 9445-9446 9459 9464-9465 9475 9479-9480 9485 9521 9525-9526 9529-9530 9535 9602 9608 9613-9615 9621-9622 9624 9635-9636 9638 9646 9648 9650 9652 9657-9658 9735 9743 9750-9751 9760 9765 9768 9770 9774 9776 9781 9790 9814 9817-9819 9822 9829 9843 9850 9854-9855 9859 9863 9871 9875 9877 9879-9880 9885 9890 9895-9896 9899 9902 9912 9916 9926 9932 9935 9942 9946 9962 9964 9967 9969 9972-9974 9984 9988 9991 10002 10008 10030 10032 10041 10044 10074 10115 10129 10137 10156-10158 10163 10213 10243 10248 10252 10257-10258 10278 10285 10293 10302 10311-10313 10318 10327-10328 10331 10334 10337 10343 10349 10351-10352 10376 10380 10383 10388 10414 10419 10423 10433 10435-10436 10443 10445 10448 10452 10461 10463 10466 10469 10478 10492 10502 10509-10510 10517 10521-10522 10535-10536 10538 10546-10549 10551 10558 10561 10564 10567 10572 10578 10585-10586 10592 10594-10595 10597-10598 10603 10605 10607 10611 10632 10635 10640-10641 10643 10658-10659 10666 10672 10677-10678 10684 10690-10691 10694 10707 10722 10727 10731 10746 10749 10752 10754 10760-10762 10790-10792 10795 10799 10802 10810 10814 10816 10826 10832 10835 10840 10846 10851 10863 10867 10872 10882-10885 10888-10889 10891 10893 10897 10903-10904 10908 10912 10923 10930 10936 10947 10952 10955-10957 10965 10970-10971 10981 10986 10990 10996-10998 11005 11019 11029 11034 11037 11040 11044-11045 11049-11050 11053-11054 11056 11063-11064 11072 11082 11084 11087 11099 11107 11109-11110 11112-11113 11122 11124 11128-11130 11135 11143 11147-11148 11153 11159 11161 11165 11169 11178 11180 11185 11187-11189 11196 11204-11205 11208 11216-11217 11220 11227 11231-11232 11245 11250 11256 11260-11261 11267 11276 11290 11299 11302-11303 11308 11310 11313 11324 11330 11337 11368 11371 11377 11379 11381 11383 11385 11389 11392 11398 11403-11404 11407-11408 11418 11429 11432 11435 11440-11441 11443 11448 11456 11459-11461 11471 11473 11484 11489 11494 11504 11521 11526 11533 11553 11777 11785-11786 11788 11801 11811 11817 11821-11822 11827 11829 11831-11832 11837 11842 11850 11912 11919 11937 12309 12316-12317 12319 12374 12384 12615 12652 12670 12753 12765 12793 13316 13320 13325 13347 13350 13359 13361 13389-13390 13398 13400 13403-13404 13410 13414 13421 13424 13440 13465 13471 13570 13575 13582 17215 17237 17255-17256 17258 17261 17299 17302 17317 17351 17356 17370 17393-17394 17400-17401 17494 17517 17531 17554 17574 17582 17594 17607 17612 17615 17618 17621-17623 17625 17642 17648-17649 17656 17663 17678-17679 17683 17686 17689 17694 17706 17708-17709 17712 17726 17741 17743 17745 17748-17749 17751-17753 17759 17763-17766 17768-17769 17771 17783 17787 17793-17794 17801 17805 17807 17809 17812 17814 17818 17826 17828 17832 17834 17836 17842 17844 17846 17859-17860 17882 17889 17894 17901 17929-17930 17935-17936 17951 17961-17965 17974 17983 17985 17990 17993 17996 18001 18003 18005-18007 18013-18015 18017 18019 18021 18024 18028-18029 18034-18035 18043 18057 18065 18067 18069 18071 18075 18078 18081 18086 18090 18097 18105 18113 18123 18128 18139 18146 18149-18150 18164 18171 18174 18176 18198 18209-18210 18212 18218 18235-18236 18238 18252 18273 18279 18284 18287 18294 18300 18307 18309-18310 18313 18321 18331 18336 18340 18345 18352 18368 18371 18375-18376 18381 18385 18387 18391 18413 18415-18416 18429 18546 18607 18625 18632 18681 18684 18738 18747-18748 18758 18770 18776 18780 18782 18785 18790 18794 18800 18809-18810 18825-18826 18831 18833-18836 18840 18843 18845 18848 18850-18851 18874 18883 18886 18898 18907 18910 18916-18917 18930 18943 18950 18996-18997 19006 19034 19036 19038 19043-19045 19051 19056 19061 19063 19068 19085-19086 19095 19102-19103 19110 19114 19132 19138 19142 19147 19154 19173 19178-19179 19186 19191 19217-19218 19220 19228-19229 19234 19236 19266 19300-19301 19322 19347 19358 19391 19395 19415 19426 19431-19432 19444 19456 19459 19462 19474 19483 19492 19496 19503 19520 19523-19524 19528 19531-19532 19536 19544 19558-19560 19562 19566 19568 19570 19579 19590 19597 19611 19619 19623 19630 19659 19663 19665-19667 19670 19676 19678 19690 19719 19723 19727 19733 19750-19751 19756 19761 19768 19782-19783 19785-19787 19801 19818 19835 19842 19847 19856 19862 19864 19883 19886 19890 19901 19903 19906 19909-19911 19913 19927 19965 19990 19997 20021 20027 20034 20045 20047 20053 20070 20084 20097 20119 20134 20136 20150 20161 20177 20183 20188 20195-20196 20201 20205 20225 20239 20244 20266 20278 20295 20329 20359 20362-20363 20373 20377 20385 20392 20394 20422 20430 20433 20438 21849 21851 21859-21860 21863 21878 21956 21965 21968-21969 21982 21988 21999 22003 22355-22356 22388 22390 22493 23052 23072 23191 23206 23211 25581 25598-25599 25821 25839 25844 25846 25853-25854 25914 25918 25927 25935 25942 25948 25975 25990 25999 26001 26015 26017 26026 26030-26032 26049 26052 26056-26057 26075 26083 26086 26089 26098-26099 26102-26103 26143 26164 26193 26201 26211-26213 26221 26231 26233-26234 26236-26237 26239 26248 26254 26262 26269-26270 26273 26295 26299 26307 26310 26313 26317 26321 26329 26332 26336 26344 26346 26349 26355 26361 26363 26366 26381 26396 26403 26411 26421 26425 26429 26437 26441 26449-26450 26467-26468 26470 26476 26479-26480 26498 26501 26515-26516 26520-26521 26525 26541 26544-26545 26547-26548 26557 26561-26562 26564 26568 26571 26574 26576 26592 26602-26603 26612 26622 26863 26877 26947 26970-26972 26978 26981 26993 26996 26998 27015 27021 27023 27031 27033 27049 27059 27063 27071 27083 27086 27090 27096 27100 27115 27123 27131 27191 27196 27208 27216 27222 27229 27238 27240 27243 27251 27261-27262 27270-27271 27278 27280-27281 27286 27294 27299 27304 27309 27312 27314 27320 27322 27324 27329 27334 27337 27339 27344-27345 27347-27348 27351 27355 27366-27367 27384 27389 27393 27398 27405 27407 27412 27420 27422 27428 27436 27453-27454 27458 27464 27471-27472 27485 27491-27492 27495 27498 27502 27506 27518-27520 27522-27525 27529 27549-27550 27555 27559-27561 27563 27571-27572 27576-27577 27584 27588 27590 27595 27597 27602 27604 27608 27610 27612-27613 27615 27619 27622 27648 27655 27663 27668 27681 27684 27686 27690 27694-27695 27707 27715 27719 27728 27732 27736 27745 27753-27754 27758 27774 27778-27779 27783 27790 27799 27803 27811 27818 27841 27845 27849-27851 27855 27857-27858 27866 27869 27877 27879 27891 27899 27903 27906 27909-27910 27922 27931 27934 27937 27939 27944 27947 27960-27961 27968-27969 27972-27974 27980 27986 27989 27995 27999 28004 28006 28008 28014 28023 28030 28038-28039 28046 28051 28055-28057 28065-28070 28073 28082 28092-28093 28102 28108 28111 28113-28115 28117-28118 28124 28130 28132 28134-28135 28141 28148 28164-28165 28173-28174 28177 28185-28186 28190 28197 28199 28201 28213 28220 28222 28228 28230 28252 28267 28274 28276 28283-28284 28296 28298 28306-28308 28314 28317 28322 28325-28326 28329 28333 28344-28346 28369 28372 28381-28383 28385 28397 28403 28408-28409 28415 28423 28426 28430 28436 28438 28444 28446 28448 28451 28455 28459 28461 28471 28474 28482-28483 28492 28501 28508 28511 28520 28527 28536 28541 28553 28558 28561 28565-28566 28573 28579 28582 28584 28587 28608-28609 28615-28616 28631 28634-28635 28645 28647 28650 28656-28658 28665-28666 28669 31313 31316 31320 31354-31355 31409 31417 31433 31437 31439 31443 31447 31456 31461-31463 31468 31487 31535 31621-31622 31625 31627 31629 31631 31643 31656 31665 31667-31668 31670 31678 31685 31690 31707 31714 31717 31719 31721 31725-31726 31730 31741 32399 32408 32410 32414 32419 32423 32426 32429 32435-32436 32443 32446 32475 32498 32500 32504 32507 32642 32680 32683 32686 36764 36766 36778-36779 36784 36789 36815 36857 45047 45054 49085 9.276497240453405e-25 9.276497240453405e-25 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/Univ/11.392?format=ascii Radio default J/other/Univ/11.392/category Category information of the sources recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int SDSS Source name from SDSS DR16Q meta.id;meta.main char RAJ2000 [0.07/359.74] SDSS Right ascension (J2000) deg pos.eq.ra;meta.main SimbadName Simbad column added by the CDS meta.id char nullable DEJ2000 [-10.66/68.33] SDSS Declination (J2000) deg pos.eq.dec;meta.main Category The final category of the source (good, candidate, or rejected) (G1) meta.code char z [3.0/7.01] Spectroscopic redshift from DR16Q src.redshift float r_z Source of redshift derived from DR16Q (see original paper) meta.ref;pos.frame char f_z [-1/68] Binary flag on SDSS pipeline redshift estimate quality (see original paper) meta.code int q_z [1/3] Flag on the reliability of the targets redshift meta.code.qual;src.redshift int MatchTierCode [3/3330] The four-digit code showing the tier flags for each radio survey meta.code int FIRST Source name from the FIRST survey catalog meta.id char NVSS Source name from the NVSS survey catalog meta.id char RACS Source name from the RACS-DR1 survey catalog meta.id char GLEAM Source name from the GLEAM survey catalog meta.id char SepFIRST [0.0/2.58]? The optical-radio separation from source positions in FIRST and SDSS arcsec pos.angDistance float nullable SepNVSS [0.02/24.86]? The optical-radio separation from source positions in NVSS and SDSS arcsec pos.angDistance float nullable SepRACS [0.02/13.91]? The optical-radio separation from source positions in RACS-DR1 and SDSS arcsec pos.angDistance float nullable SepGLEAM [1.17/107.56]? The optical-radio separation from source positions in GLEAM and SDSS arcsec pos.angDistance double nullable VIcodeFIRST Radio identification code on source morphology and type on FIRST (2) meta.code char VIcodeNVSS Radio identification code on source morphology and type on NVSS (2) meta.code char VIcodeRACS Radio identification code on source morphology and type on RACS-DR1 (2) meta.code char VIcodeGLEAM Radio identification code on source morphology and type on GLEAM (2) meta.code char comment1 Comment on the source identification from visual inspection meta.note char comment2 Comment on the source morphology from visual inspection meta.note char
J/other/Univ/11.392/param Radio observation from surveys NVSS Source name from the NVSS survey catalog meta.id char S1.4NVSS [2.1/2417.6]? Total flux density at 1.4GHz from NVSS mJy phot.flux.density;em.radio.750-1500MHz float nullable e_S1.4NVSS [0.4/72.5]? Uncertainty of source flux density at 1.4GHz from NVSS mJy stat.error float nullable RACS-DR1 Source name from the RACS-DR1 survey catalog meta.id char FpkRACS [1.18/1010.34]? Peak flux density from RACS-DR1 mJy/beam phot.flux.density;em.radio double nullable e_FpkRACS [0.2/4.76]? Uncertainty of peak flux density from RACS-DR1 mJy/beam stat.error float nullable FtotRACS [1.22/1038.48]? Total flux density from RACS-DR1 mJy phot.flux.density;em.radio double nullable recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int SDSS Source name from SDSS DR16Q meta.id;meta.main char RAJ2000 [0.07/359.74] SDSS Right ascension (J2000) deg pos.eq.ra;meta.main DEJ2000 [-10.66/68.33] SDSS Declination (J2000) deg pos.eq.dec;meta.main Category The final category of the source (good, candidate, or rejected) (G1) meta.code char z [3.0/7.01] Spectroscopic redshift from DR16Q src.redshift float FIRST Source name from the FIRST survey catalog meta.id char FpeakFirst [0.75/2404.56]? Peak flux density at 1.4GHz from FIRST mJy/beam phot.flux.density;em.radio.750-1500MHz double nullable FintFirst [0.46/2430.88]? Integrated flux density at 1.4GHz from FIRST mJy phot.flux.density;em.radio.750-1500MHz double nullable rmsFirst [0.08/1.73]? rms noise of the source at 1.4GHz from FIRST mJy/beam phot.flux.density;em.radio.750-1500MHz float nullable e_FtotRACS [0.36/8.22]? Uncertainty of total flux density from RACS-DR1 mJy stat.error float nullable GLEAM Source name from the GLEAM survey catalog meta.id char FpwideGLEAM [0.04/7.01]? Peak intensity of the GLEAM source in the wide-band image Jy/beam phot.flux.density;em.radio double nullable e_FpwideGLEAM [0.0/0.09]? Uncertainty of peak intensity of the GLEAM source in the wide-band image Jy/beam stat.error double nullable FintwideGLEAM [0.04/6.76]? Integrated intensity of the GLEAM source in the wide-band image Jy phot.flux.density;em.radio double nullable e_FintwideGLEAM [0.0/0.2]? Uncertainty of integrated intensity of the GLEAM source in the wide-band image Jy stat.error double nullable