J/ApJ/679/239ivo://CDS.VizieR/J/ApJ/679/239doi:10.26093/cds/vizier.16790239CDSVanden Berk D.Khare P.York D.G.Richards G.T.Lundgren B.,Alsayyad Y.Kulkarni V.P.Subbarao M.Schneider D.P.Heckman T.,Anderson S.Crotts A.P.S.Frieman J.Stoughton C.Lauroesch J.T.,Hall P.B.Meiksin A.Steffing M.Vanlandingham J.2017-07-04T07:08:42Z2010-10-13T11:06:46ZCDS support team

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

cds-question@unistra.frquasarsline-intensitiesredshiftedvisible-astronomysloan-photometryWe studied a sample of 415 associated (z_abs_~z_em_; relative velocity with respect to QSO in units of c, {beta}<0.01) MgII absorption systems with 1.0<=z_abs_<=1.86, in the spectra of SDSS DR3 QSOs, to determine the dust content and ionization state in the absorbers. We also compared these properties to those of a similarly selected sample of 809 intervening systems ({beta}>0.01), so as to understand their origin. Normalized, composite spectra were derived for absorption line measurements, for the full sample and for several subsamples, chosen on the basis of the line strengths and other absorber and QSO properties. From these, and from the equivalent widths in individual spectra, we conclude that the associated MgII absorbers have higher ionization (higher ratios of the strengths of CIV and MgII lines), than the intervening absorbers. The ionization decreases with increasing {beta}. Average extinction curves were obtained for the subsamples by comparing their geometric mean QSO spectra with those of matching (in z_em_ and i magnitude) samples of QSOs without absorption lines. There is clear evidence for SMC-like dust attenuation in these systems; the 2175{AA} absorption feature is absent. The extinction is almost twice that observed in intervening systems. We reconfirm that QSOs with nonzero FIRST radio flux are intrinsically redder than the QSOs with no detection in the FIRST survey.2008ApJ...679..239Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/679/239CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/ApJ/639/766 : SDSS-DR3 strong MgII absorbers (Prochter+, 2006)J/ApJS/165/1 : BAL QSOs from SDSS DR3 (Trump+, 2006)J/MNRAS/371/495 : Catalogue of 1806 MgII absorbers from SDSS DR3 (Bouche+,J/MNRAS/354/L25 : MgII absorbers in SDSS QSOs (Bouche+, 2004)J/A+A/410/33 : MgII/FeII absorbers in 2dF-quasar survey (Menard+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/679/239https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/679/239http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/679/239https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/679/239https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/679/239http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/679/239GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/679/239/sample (Absorber and matching non-absorber sample with equivalent widths)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/679/239/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/679/239/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/679/239/sample?GETtext/xml+votable180.050000true1.14135-0.812450.0055555555555555565/4309 6/553 640 4103 4132 4137 4148 4163 4166 4177 4781 4783 4794 4798 4847 4858 4861 5053 5055 5080 5089 5103 5104 5107 5116 5615 5622 5695 5706 5734 5738 5749 5750 5783 5788 5795 5815 5816 5818 5862 5878 5881 5884 5887 5918 5939 5940 5954 5961 5988 5989 5990 6006 6009 6023 6030 6036 6037 6044 6063 6070 6093 6097 6099 6107 6109 6116 6127 6160 6167 6209 6211 6215 6224 6246 6264 6266 6269 6385 6407 6416 6427 6428 6445 6457 6467 6468 6496 6503 6517 6522 6532 6544 6549 6554 6556 6560 6567 6594 6599 6607 7173 7182 7201 7202 7206 7216 7219 7239 7244 7247 7256 7262 7299 7300 7301 7306 7311 7321 7322 7366 7367 7424 7426 7427 7441 7445 7449 7468 7478 7479 7515 7524 7526 8197 8202 8204 8206 8207 8210 9203 9307 9343 9417 9444 9447 9451 9459 9601 9603 9611 9615 9634 9639 9802 9861 9877 9911 9919 9925 10061 10073 10099 10192 10209 10619 10669 10685 10719 10743 10932 10971 11027 11033 11067 11118 11176 11189 11190 11220 11226 11234 11239 11272 11301 11310 11319 11335 11341 11346 11351 11365 11368 11380 11381 11389 11399 11402 11425 11430 11457 11459 11462 11470 11480 11486 11492 11502 11597 11783 11802 11813 11818 11838 11842 11845 11850 11851 11852 11855 11904 11923 11924 11932 11942 11956 12289 12381 12549 12563 17150 17240 17257 17299 17303 17315 17316 17492 17555 17565 17575 17604 17750 17770 17812 17827 17981 17999 18006 18067 18077 18088 18098 18396 18416 18533 18598 18603 18608 18773 18777 18778 18788 18794 18798 18836 18947 18976 19006 19032 19044 19051 19087 19099 19407 19429 19684 19727 19737 19745 19754 19755 19996 20009 20016 21849 21885 22715 22716 23058 23074 23183 23188 23190 23196 23234 25583 25591 25850 25854 25912 25930 25933 25938 25953 25986 25987 25988 25998 26001 26004 26013 26018 26023 26024 26025 26037 26169 26190 26209 26215 26228 26243 26278 26288 26295 26336 26345 26379 26384 26958 26962 26990 26993 27029 27034 27038 27068 27074 27085 27086 27097 27227 27229 27258 27286 27287 27320 27331 27334 27337 27339 27345 27355 27378 27418 27422 27467 27478 27483 27563 27661 27662 27689 27742 27753 30040 30065 31317 31325 31335 31337 31342 31392 31394 31402 31406 31456 32511 32682 36715 36767 36775 36788 45049 45050 45053 45054 49009 49015 49020 49085 491002.381800341673347e-19 2.821731604724377e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/679/239?format=asciiOpticaldefaultJ/ApJ/679/239/sampleAbsorber and matching non-absorber sample with equivalent widthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlateAbsorber plate numberobs.fieldintFiberAbsorber fiber numbermeta.noteintMJDAbsorber Modified Julian Datedtime.epochintzem(A)Absorber emission line redshiftsrc.redshiftfloatDg-i(A)Absorber {Delta}(g-i) (1)magphot.color;arith.difffloatzab(A)Absorber absorption line redshiftsrc.redshiftfloatimag(A)Absorber SDSS i band magnitudemagphot.mag;em.opt.Ifloatbeta(A)Absorber {beta} value (2)stat.fit.paramfloatPlate2Non-absorber plate numberobs.fieldintFiber2Non-absorber fiber numbermeta.noteintMJD2Non-absorber Modified Julian Datedtime.epochintzem(N)Non-absorber emission line redshiftsrc.redshiftfloatDg-i(N)Non-absorber {Delta}(g-i) (1)magphot.color;arith.difffloatimag(N)Non-absorber SDSS i band magnitudemagphot.mag;em.opt.IfloatDR7Display the details of the photometry from SDSS-DR7 (Cat. II/294)meta.ref.urlcharAbsDisplay the SDSS data for the absorbermeta.ref.urlcharNAbsDisplay the SDSS data for the non-absorbermeta.ref.urlcharAlII? Equivalent width of AlII (1670{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_AlII? The 1{sigma} error in AlII (1)0.1nmstat.errorfloatnullableCIVa? Equivalent width of CIV (1548{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_CIVa? The 1{sigma} error in CIVa (1)0.1nmstat.errorfloatnullableCIVb? Equivalent width of CIV (1550{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_CIVb? The 1{sigma} error in CIVb (1)0.1nmstat.errorfloatnullableMgI? Equivalent width of MgI (2852{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_MgI? The 1{sigma} error in MgI (1)0.1nmstat.errorfloatnullableMgIIa? Equivalent width of MgII (2796{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_MgIIa? The 1{sigma} error in MgIIa (1)0.1nmstat.errorfloatnullableMgIIb? Equivalent width of MgII (2803{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_MgIIb? The 1{sigma} error in MgIIb (1)0.1nmstat.errorfloatnullableSiIVa? Equivalent width of SiIV (1396{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_SiIVa? The 1{sigma} error in SiIVa (1)0.1nmstat.errorfloatnullableSiIVb? Equivalent width of SiIV (1403{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_SiIVb? The 1{sigma} error in SiIVb (1)0.1nmstat.errorfloatnullableFeII? Equivalent width of FeII (2382{AA}) (1)0.1nmspect.line.eqWidthfloatnullablee_FeII? The 1{sigma} error in FeII (1)0.1nmstat.errorfloatnullable_RAPositions, from SDSS-DR7 (right ascension part)degpos.eq.ra;meta.main_DEPositions, from SDSS-DR7 (declination part)degpos.eq.dec;meta.main