J/MNRAS/435/3306ivo://CDS.VizieR/J/MNRAS/435/3306doi:10.26093/cds/vizier.74353306CDSAlexandroff R.Strauss M.A.Greene J.E.Zakamska N.L.Ross N.P.,Brandt W.N.Liu G.Smith P.S.Ge J.Hamann F.Myers A.D.,Petitjean P.Schneider D.P.Yesuf H.York D.G.2024-08-06T20:17:13Z2014-11-12T11:45:30ZCDS support team

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

cds-question@unistra.frquasarsline-intensitiesinfrared-photometryAt low redshifts, dust-obscured quasars often have strong yet narrow permitted lines in the rest-frame optical and ultraviolet, excited by the central active nucleus, earning the designation type II quasars. We present a sample of 145 candidate type II quasars at redshifts between 2 and 4.3, encompassing the epoch at which quasar activity peaked in the universe. These objects, selected from the quasar sample of the Baryon Oscillation Spectroscopic Survey of the Sloan Digital Sky Survey III, are characterized by weak continuum in the rest-frame ultraviolet (typical continuum magnitude of i~22) and strong lines of CIV and Ly{alpha}, with full width at half-maximum less than 2000km/s. The continuum magnitudes correspond to an absolute magnitude of -23 or brighter at redshift 3, too bright to be due exclusively to the host galaxies of these objects. Roughly one third of the objects are detected in the shorter wavelength bands of the Wide-Field Infrared Survey Explorer survey; the spectral energy distributions of these objects appear to be intermediate between classic type I and type II quasars seen at lower redshift. Five objects are detected at rest frame 6{mu}m by Spitzer, implying bolometric luminosities of several times 10^46^erg/s. We have obtained polarization measurements for two objects; they are roughly 3 percent polarized. We suggest that these objects are luminous quasars, with modest dust extinction (A_V_~0.5mag), whose ultraviolet continuum also includes a substantial scattering contribution. Alternatively, the line of sight to the central engines of these objects may be obscured by optically thick material whose covering fraction is less than unity.2013MNRAS.435.3306Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/435/3306CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/328 : AllWISE Data Release (Cutri+ 2013)J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/435/3306https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/435/3306http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/435/3306https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/435/3306https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/435/3306http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/435/3306GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/435/3306/qso2 (Class A (table2) and B (table3) candidate type-II quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/435/3306/qso2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/435/3306/qso2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/435/3306/qso2?GETtext/xml+votable180.050000true2.670080.7640.0055555555555555566/36 4103 4113 4115 4134 4282 4612-4613 4617 4623 4644 4668 4670 4682 4718 4723 4729 4743-4744 4763 4800 4807 4831 4847 4994 5003 5037 5039 5049 5052-5053 5098 5354 5361 5371 5392 5394 5425 5440 5445 5454 5458 5490 5508 5511 5517 5519 5534 5536 5541-5542 5560 5562 5663 5678 5683 5685 5704-5705 5712 5721 5727 5733-5734 5750 5830 5888 5891 6151 6160 6169 6172 6244 6252 6355 6366 6406 6416 6428 6439 6443 6464 6498 6505 6536 6572 6592 6600 6606 6644 6651 6929 7339 8193 8200 8206-8207 8225 8247 8501 8506 8515 8518 8527 8539 8546 8551 8562 8569 8573 8590 8594 8606 8609 8615 8619 8627 8635 8658-8660 8669 8677 8679 8682-8683 8976 9024 9031 9033 9046 9055 9069 9082 9084 9127 9152 9169 9178 9188 9229-9230 9248-9249 9258 9263 9265 9305 9309 9334 9345 9352 9354 9365 9373 9391 9396 9399 9408 9417 9449 9473 9485 9491 9520 9732 9745 10366 10427 10459 10467 10502 10509 10515 10540 10545 10627 10657-10658 10799 10804 10828 10831 10840 10852 10880 10883 10892 10896 10901-10902 10944 10946 12361 12369 12387 17403 17659 17685 17695 17713 17719 17731 17753 17758 17767 17769 17778 17783 17804 17807 17813 17817 17821-17824 17829 17832-17833 17844 17846 17874 17889 17897 17991 18006-18007 18012 18026 18034 18039 18062 18065 18070 18083 18089 18092-18093 18105 18113 18117 18123 18127 18139 18176 18198 18242 18247 18267 18299 18767 18769 18773 18782 18798 18802 18834-18835 18837 18842-18844 18851 18854 18856 18886 18923 18989 19030 19046-19047 19049 19052 19086-19087 19092 19094 19097 19122 19132 19136 19155 19190 19200 19207 19234 19352 19365 21850 21878 21972 22367 22398 22484 25583 25594 25923 25927-25928 25944-25945 25956 25970 25999 26011 26027 26038-26039 26061 26086 26089 26099 26104 26110 26180 26201 26206 26208 26228 26254 26271 26286 26306-26307 26317 26323 26334 26346 26348 26371 26393 26403 26438 26498 26868 26877 26911 26927 26961 26965 26975 26978 26982 26988 26995 27051 27053 27070 27072 27193 27239 27245-27246 27251 27260 27262 27280 27298 27305 27309 27313-27314 27320 27335 27341 27355 27363 27381 27393 27415 27424 27426 27428 27432 27437 27522 27531 27651-27652 27665 27679 27681 27684-27685 27687 28540 28574 28606 28623-28624 28632 28638 28641 28664 28667 31338 31357 31399 31418 31455 31467 31528 31672 31710 31720 31731 31737-31738 32392 32430 32478 32506 32696 36784 36786 36792 36858 36860 450458.157980699529898e-21 6.513807192489934e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/435/3306?format=asciiInfrareddefaultJ/MNRAS/435/3306/qso2Class A (table2) and B (table3) candidate type-II quasarsW(CIV)Pipeline measured CIV width (1549{AA})km/sspect.line.widthinte_W(CIV)Error on W(CIV)km/sstat.errorintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCSimbad column added by the CDSmeta.code.classcharSDSSSDSS J2000 name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryRAJ2000Right ascension of source (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of source (J2000)degpos.eq.dec;meta.mainzRedshift of sourcesrc.redshiftfloatW(CIV)r? Pipeline measured rest equivalent width0.1nmspect.line.widthfloatnullablee_W(CIV)r? Error on REWCIV0.1nmstat.errorfloatnullableF(CIV)Pipeline measured CIV flux1e-20W.m**-2phot.fluxfloate_F(CIV)Error on F(CIV)1e-20W.m**-2stat.errorfloatF(Lya)Pipeline measured Lyman {alpha} flux (1216{AA})1e-20W.m**-2phot.fluxfloate_F(Lya)Error on F(Lya)1e-20W.m**-2stat.errorfloatNote[*] indicates WISE matches (tables 7-8)meta.notecharSloanDisplay the SDSS data for this quasarmeta.ref.urlcharWISEAllWISE details (Cutri et al. 2013, Cat. II/328)meta.ref.urlcharJ/MNRAS/435/3306/wiseAll WISE matches in our class A (table7) and B (table8) Type-II quasarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSsSDSS J2000 short name (JHHMM+DDMM)meta.idcharW1mag? WISE/W1 (3.5um; AB magnitudes)magphot.mag;em.IR.3-4umfloatnullablee_W1mag? Error on W1mag (AB magnitudes)magstat.error;phot.magfloatnullableW2mag? WISE/W2 (4.6um; AB magnitudes)magphot.mag;em.IR.4-8umfloatnullablee_W2mag? Error on W2mag (AB magnitudes)magstat.error;phot.magfloatnullableW3mag? WISE/W3 (11.6um; AB magnitudes)magphot.flux.density;em.IR.8-15umfloatnullablee_W3mag? Error on W3mag (AB magnitudes)magstat.error;phot.magfloatnullableW4mag? WISE/W4 (22.1um; AB magnitudes)magphot.flux.density;em.IR.15-30umfloatnullablee_W4mag? Error on W4mag (AB magnitudes)magstat.error;phot.magfloatnullableCSimbad column added by the CDSmeta.code.classcharSDSSSDSS J2000 name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharWISEAllWISE details (Cutri et al. 2013, Cat. II/328)meta.ref.urlchar