J/MNRAS/393/1408ivo://CDS.VizieR/J/MNRAS/393/1408doi:10.26093/cds/vizier.73931408CDSChen P.S.Shan H.G.2024-07-08T20:15:17Z2009-12-20T12:14:52ZCDS support team

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

cds-question@unistra.frquasarsinfrared-photometryFor this paper, we collected almost all of the type II quasars so far discovered. Among them, 485 sources have photometric data at JHK bands, mainly from Two-Micron All-Sky Survey observations, 65 sources have IRAS photometric data in at least one of the three IRAS bands at 25, 60 and 100um and 15 sources have IRAS photometric data in all three IRAS bands. We find that in nearly half of all type II quasars, both the near- and far-infrared radiations are dominated by starlight or thermal reprocessing of starlight by dust in the underlying galaxy. The infrared radiation of the other group (slightly over half) is dominated by a non-thermal radiation in the near-infrared, and mostly in the far-infrared also (although there is a mixture particularly for the longer wavelengths). It is proposed that for the later group, hidden broad lines may exist in the infrared. On the basis of our and previous results, we also discuss the possibility that there are two distinct classes of type II quasars: 'true' type II quasars without a broad-line region and heavily obscured type I quasars, in full analogy with the case for type II Seyfert galaxies. No relationships can be found for either the near-infrared or the far-infrared colours and the redshift. Correlations between absolute magnitude in the near- and far-infrared with redshift are found, but could be due to a flux limit (Malmquist bias).2009MNRAS.393.1408Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/393/1408CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/126/2125 : SDSS candidate type II quasars (Zakamska+, 2003)J/AJ/128/1002 : SDSS candidate type II quasars. II (Zakamska+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/393/1408https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/393/1408http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/393/1408https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/393/1408https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/393/1408http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/393/1408GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/393/1408/table1 (Near-infrared observation of type II quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/393/1408/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/393/1408/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/393/1408/table1?GETtext/xml+votable180.050000true0.9658333-1.02836110.0055555555555555566/544 4102 4106 4116 4139 4151 4166 4206 4232 4412 4438 4442 4507 4510 4518 4570 4659 4686 4711 4729 4752 4754 4775 4816 4831 4837 4846 4867 4870 4903 4939 4954 4964 4966 4992 5004 5016 5020 5042-5043 5046 5053 5058 5095 5097 5100 5106 5114-5115 5182 5287 5367 5372 5393 5401 5452 5478 5527 5579 5622 5624 5671 5712 5779 5795 5806 5851 5905-5906 5911 5918-5919 5922 5924 5928 5932 5957 5990 5992 6006-6007 6020 6044 6046 6054 6069 6080 6090 6093 6099 6107 6109 6117 6128 6132 6141 6197 6208 6217 6225 6236 6254 6264 6355 6396 6400 6426 6429 6446 6457 6470 6475 6478 6482 6486 6502 6507 6515 6518 6534-6535 6544 6560 6567 6571 6574 6601 6625 6648 7171 7186 7223-7224 7232 7295 7300 7309 7345 7425 7446 7462 7477 7502 8196 8217 8346 8357 8664 8695 8724 8923 9083 9086 9136 9144 9160 9178 9186 9203 9207 9272 9356 9371 9376 9419 9439 9445-9446 9454 9457 9468 9474 9609 9635 9638 9646 9746 9750 9772-9773 9776 9778 9802 9809 9819 9822 9827 9852 9869 9883 9890 9901 9907 9924 9959-9960 9974 9993 10020 10182 10190 10213 10290 10312 10346 10374 10499 10534 10576 10587-10588 10622 10641 10651 10657 10672-10673 10726 10743 10747 10768 10789 10836 10863 10885 10898-10899 10905 10910-10911 10917 10948 10971 10979 10992 10995 11018 11046 11070 11100 11102 11117 11132 11144 11170 11200 11205 11230 11303 11339 11393 11396 11399 11407 11416 11419 11456 11471 11493 11794 11807 11816-11817 11830 11833-11834 11846 11875 11909 11918 11925 11952 12288 12380 12642 16029 17149 17237 17243 17251 17253 17294 17405 17407 17507 17514 17520 17553 17555 17663-17664 17750 17753 17767 17776 17805 17829 17833 18006 18009 18018 18023 18067 18072 18113 18388 18526 18545 18583 18586 18791 18833 18846 18857 18919 18947 19041 19052 19091 19093 19099 19375 19428 19679 19735 19755 19762 19991 20012 21873 22714 23060-23061 23076 23146-23147 23181 23190 23193 23204 23207-23208 25567 25610 25907 25917 25937 25949 25953 25970 25990 26018 26023 26033 26037 26044 26071 26084 26096 26142 26169 26213 26222 26227 26246 26254-26255 26291 26297 26330 26397 26407 26446 26453 26459 26491 26570 26592 26603 26942 26946 26948 26967 26973 26985 26997 27028 27037 27043 27077 27097 27105 27107 27128 27131 27219-27220 27228 27230 27249 27291 27311 27343 27351 27393 27396 27414 27450 27459 27464 27474 27483 27505 27521 27529 27536 27579 27581 27608 27653 27656 27669 27674 27708 27724 27734 27767 27799 27803 27950 27976 28033 28141 28162 28169 28397 28408 28590 28605 28611 28637 28658 31293 31295 31392 31403 31456 31625 32409 32437 32447 32508 32511 34362 34576 35935 36728 36730 36792 46982 48423 48991 49099 491241.6558465556080236e-21 9.957392048645222e-21https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/393/1408?format=asciiInfrareddefaultJ/MNRAS/393/1408/table1Near-infrared observation of type II quasarszRedshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq? Sequential number, from Reyes et al. 2008AJ....136.2373Rmeta.id;meta.mainintnullableprimaryn_SeqSimbad column added by the CDSmeta.ref.urlcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainr[r] indicates coordinates from the original referencemeta.notecharJmag? J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmagK magnitudemagphot.mag;em.IR.Kfloate_Kmag? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatnullableE(B-V)Colour excessmagphot.color.excessfloatn_Notes[*] * indicates source located near the power-law distribution of Fig. 1meta.notecharNotesNotes (1)meta.notechar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharNameNamemeta.idcharJ/MNRAS/393/1408/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharJ/MNRAS/393/1408/table2IRAS observation of type II quasarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq? Sequential numbermeta.recordintnullableNameNamemeta.idcharzRedshiftsrc.redshiftfloatIRASIRAS namemeta.idcharF25? IRAS flux at 25umJyphot.flux.density;em.IR.15-30umfloatnullableF60IRAS flux at 60umJyphot.flux.density;em.IR.30-60umfloatF100? IRAS flux at 100umJyphot.flux.density;em.IR.60-100umfloatnullableSimbadSimbad column added by the CDSchar