J/MNRAS/494/789ivo://CDS.VizieR/J/MNRAS/494/789doi:10.26093/cds/vizier.74940789CDSRoss N.P.Cross N.J.G.2025-05-22T20:15:42Z2023-07-28T12:48:33ZCDS support team

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

cds-question@unistra.frquasarsredshiftedinfrared-photometryastrometryWe assemble a catalogue of 488 spectroscopically confirmed very high (z>=5.00) redshift quasars (VHzQ) and report their near- (ZYJHK_s_/K) and mid- (WISE W1234) infrared properties. 97 per cent of the VHzQ sample is detected in one or more near-infrared (NIR) band, with lack of coverage rather than lack of depth being the reason for the non-detections. 389 (80 per cent) of the very high redshift quasars are detected at 3.4{mu}m in the W1 band from the unWISE catalogue and all of the z>=7 quasars are detected in both unWISE W1 and W2. Using archival Wide Field Camera (WFCAM)/United Kingdom Infrared Telescope (UKIRT) and VISTA Infrared Camera (VIRCAM)/Visible and Infrared Survey Telescope for Astronomy (VISTA) data we check for photometric variability that might be expected from super-Eddington accretion. We find 28 of the quasars have sufficient NIR measurements and signal-to-noise ratio to look for variability. Weak variability was detected in multiple bands of Sloan Digital Sky Survey (SDSS) J0959+0227, and very marginally in the Y-band of MMT J0215-0529. Only one quasar, SDSS J0349+0034, shows significant differences between WFCAM and VISTA magnitudes in one band. With supermassive black hole accretion likely to be redshift invariant up to very high redshift, further monitoring of these sources is warranted. All the data, analysis codes and plots used and generated here can be found at: github.com/d80b2t/VHzQ.2020MNRAS.494..789Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/494/789CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)II/363 : The band-merged unWISE Catalog (Schlafly+, 2019)II/328 : AllWISE Data Release (Cutri+ 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/494/789https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/494/789http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/494/789https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/494/789https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/494/789http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/494/789GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/494/789/table3 (488 very high-z quasars with near and MIR photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/494/789/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/494/789/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/494/789/table3?GETtext/xml+votable180.050000true0.3401134826.835881380.0055555555555555565/4758 6/0 33 42 402 424 471 588 717 2058 2138 2187 2229 2584 2607 2683 2694 4096 4098 4102-4104 4121 4157 4224 4242 4279 4339 4341 4384 4472 4507 4545 4626 4662 4822 4831 4872 4931 4954 5001 5016 5049 5066 5121 5153 5166 5170 5243 5400 5440 5444 5458 5574 5624 5630 5654 5723 5769 5905-5906 6071 6073 6083 6096 6112 6172 6239 6287 6470 6502 6552 6646 6917 7197 7297 7326 7378 7942 8260 8269 8286 8289 8481 8499 8505 8542 8570 8598 8632 8713 8722 8819 8829 9020 9084 9146 9195 9231 9275 9278 9285 9333 9373 9392 9439 9469 9659 9716 9818 9831 9855 9920-9921 10024 10121 10246 10257 10320 10336 10369 10414 10451 10456 10501 10512 10518 10642 10656 10665 10686 10741 10745 10750 10756 10933 10935 10968 11116 11126 11143 11252 11317 11393 11399 11430 11432 11436-11437 11440 11450 11473 11520 11561 11603 11916 12402 12475 12567 12576 13358 13418 16083 16531 16554 16597 16641 16868 17068 17105 17236 17245 17252 17358 17362 17382 17494 17504 17649 17654 17663 17668 17676 17679 17681 17690-17691 17701 17711 17718 17721 17743 17767 17770 17809 17813 17820 17872 17898 17989 17993 17997 18009 18018 18031 18061 18063-18064 18088 18155 18175 18177 18181 18222 18242 18310 18601 18627 18638 18685 18687 18706 18717 18742 18751 18773 18789 18839 18844 18855 18857-18860 18870 18873 18882 19006 19008 19025 19036 19058-19059 19062 19064 19067 19069 19086 19109 19137 19202-19203 19205 19214 19217 19233 19440 19501 19507 19525 19622 19849 19920 20037 20116 20173 20191 20273 20275 20390 20421 20441 20444 21263 21271 21831 21845 21848 21850 21872 21881 21914 21969 21989 22393 22424 22623 22683 22742 22786 22922 23102 23147 23150 23191 23210 23216 23519 25176 25268 25330 25375 25400 25478 25484 25589 25597 25669 25782 25844 25875 25933 25953 25955 25958 25961 26001-26002 26009 26048-26049 26051 26181 26239 26244 26279-26282 26290 26296 26344 26351 26451 26470 26524 26526 26567 26650 26676-26677 26715 26869-26870 26885 26960 26962 26969 26972-26974 26978 27022 27041 27118 27124 27194 27203 27245 27257-27258 27301 27311 27320 27327 27356 27359 27440 27452 27500 27537 27564 27651 27676 27699-27700 27781 27790 27792 27833 27876 28046 28067 28078 28080 28124 28144 28178 28232 28256 28294 28319 28452 28554 28572 28614 30036 30039 30849 30906 31248 31318 31326 32361 32387 32544 32950 33271 33695 33711 33762 34187 34373 34380 34432 34462 34762 34897 35100 35304 35518 35615 35675 35727 35790 35895 35909 35963 36007 36083 36182 36300 36321 36631 36709 36792 36799 36838 36847 40326 40646 40731 40924 40934 43895 43959 44391 44429 44445 44463 44595 44743 44747 44753 44784 44984 45513 46284 46589 46727 46983 48313 48512 48715 48899 48922 48974https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/494/789?format=asciiInfrareddefaultJ/MNRAS/494/789/table3488 very high-z quasars with near and MIR photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatZmag? Z-band magnitude (AB)magphot.mag;em.opt.Ifloatnullablee_Zmag? Error on Zmagmagstat.error;phot.magfloatnullableYmag? Y-band magnitude (AB)magphot.mag;em.IR.Jfloatnullablee_Ymag? Error on Ymagmagstat.error;phot.magfloatnullableJmag? J-band magnitude (AB)magphot.mag;em.IR.Jfloatnullablee_Jmag? Error on Jmagmagstat.error;phot.magfloatnullableHmag? H-band magnitude (AB)magphot.mag;em.IR.Hfloatnullablee_Hmag? Error on Hmagmagstat.error;phot.magfloatnullableKmag? K-band magnitude (AB)magphot.mag;em.IR.Kfloatnullablee_Kmag? Error on Kmagmagstat.error;phot.magfloatnullableW1mag? W1-band unWISE magnitude (AB) (1)magphot.mag;em.IR.3-4umfloatnullablee_W1mag? Error on W1magmagstat.error;phot.magfloatnullableW1SNR? Signal to noise ratio on the W1-bandstat.snrfloatnullableW2mag? W2-band unWISE magnitude (AB) (1)magphot.mag;em.IR.4-8umfloatnullablee_W2mag? Error on W2magmagstat.error;phot.magfloatnullableW2SNR? Signal to noise ratio on the W2-bandstat.snrfloatnullableW3mag? W3-band AllWISE magnitude (AB) (1)magphot.flux.density;em.IR.8-15umfloatnullablee_W3mag? Error on W3mag (2)magstat.error;phot.magfloatnullableW3SNR? Signal to noise ratio on the W3-bandstat.snrfloatnullableW4mag? W4-band AllWISE magnitude (AB) (1)magphot.flux.density;em.IR.15-30umfloatnullablee_W4mag? Error on W4mag (2)magstat.error;phot.magfloatnullableW4SNR? Signal to noise ratio on the W4-bandstat.snrfloatnullableNameQuasar namemeta.id;meta.maincharSimbadNameSimbad column added by the CDSmeta.idcharnullable