J/ApJS/221/32ivo://CDS.VizieR/J/ApJS/221/32doi:10.26093/cds/vizier.22210032CDSChen Z.-F.Gu Q.-S.Chen Y.-M.2017-12-07T07:27:52Z2016-02-10T12:45:46ZCDS support team

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

cds-question@unistra.frquasarsline-intensitiesredshiftedspectroscopysurveysUsing the Data Release 9 Quasar spectra from the Baryonic Oscillation Spectroscopic Survey, which does not include quasar spectra from the Sloan Digital Sky Survey Data Release 7, we detect narrow MgII{lambda}{lambda}2796,2803 absorption doublets in the spectral data redward of 1250{AA} (quasar rest frame) until the red wing of the MgII{lambda}2800 emission line. Our survey is limited to quasar spectra with a median signal-to-noise ratio <S/N>{>=}4/pixel in the surveyed spectral region, resulting in a sample that contains 43260 quasars. We have detected a total of 18598 MgII absorption doublets with 0.2933<=z_abs_<=2.6529. About 75% of absorbers have an equivalent width at rest frame of W_r_^{lambda}2796^. About 75% of absorbers have doublet ratios (DR=W_r_^{lambda}2796^/W_r_^{lambda}2803^) in the range of 1<=DR<=2, and about 3.2% lie outside the range of 1-{sigma}_DR_<=DR<=2+{sigma}_DR_. We characterize the detection false positives/negatives by the frequency of detected MgII absorption doublets in the limits of the S/N of the spectral data. The S/N=4.5 limit is assigned a completeness fraction of 53% and tends to be complete when the S/N is greater than 4.5. The redshift number densities of all of the detected MgII absorbers moderately increase from z~0.4 to z~1.5, which parallels the evolution of the cosmic star formation rate density. Limiting our investigation to those quasars whose emission redshift can be determined from narrow emission lines, the relative velocities ({beta}) of MgII absorbers have a complex distribution which probably consists of three classes of MgII absorbers: (1) cosmologically intervening absorbers; (2) environmental absorbers that reside within the quasar host galaxies or galaxy clusters; (3) quasar outflow absorbers. After subtracting contributions from cosmologically intervening absorbers and environmental absorbers, the {beta} distribution of the MgII might mainly be contributed by the quasar outflow absorbers and peaks at {upsilon}~1500km/s. This peak velocity is lower than the value of 2000km/s found in statistical analysis of CIV absorbers.2015ApJS..221...32Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/221/32CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/269 : SDSS Quasar Catalog, DR9Q (Paris+, 2012)VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)J/ApJS/215/12 : BOSS narrow CIV absorption lines. II. zem>2.4 (Chen+, 2014)J/MNRAS/444/1747 : CaII absorbers in SDSS QSOs (Sardane+, 2014)J/ApJS/210/7 : BOSS narrow CIV absorption lines. I. zem<=2.4 (Chen+, 2014)J/ApJ/779/161 : MgII absorbers in 0.4<z<2.3 SDSS QSOs (Seyffert+, 2013)J/ApJ/776/114 : MAGIICAT. I. MgII Absorber-Galaxy Catalog (Nielsen+, 2013)J/MNRAS/434/163 : QSOs narrow absorption line variability (Hacker+, 2013)J/PASJ/65/8 : Catalog of SDSS quasar absorption redshift (Qin+, 2013)J/ApJ/763/37 : Metals in SDSS QSOs I. CIV absorbers (Cooksey+, 2013)J/ApJ/761/112 : High-redshift MgII absorption QSO with FIRE (Matejek+, 2012)J/ApJ/748/131 : MgII absorbers in SDSS-DR7 quasar catalog (Shen+, 2012)J/AJ/142/122 : SDSS DR7 galaxy/QSOs pairs (Cherinka+, 2011)J/AJ/141/137 : Pittsburgh SDSS Mg II QSO catalog (Quider+, 2011)J/ApJ/729/87 : SiIV absorption systems (Cooksey+, 2011)J/ApJ/727/47 : The MgII cross-section of red galaxies (Bowen+, 2011)J/ApJ/724/L176 : MgII absorbing gas around galaxies (Chen+, 2010)J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)J/ApJ/714/1521 : Spectroscopy of galaxies around distant QSOs (Chen+, 2010)J/ApJ/708/868 : CIV candidates (Cooksey+, 2010)J/ApJ/698/819 : MgII and LRGs cross-correlation analysis (Lundgren+, 2009)J/ApJ/679/239 : Associated MgII absorbers (Vanden+, 2008)J/ApJ/660/1093 : Weak MgII absorbers at 0.4<z<2.4 (Narayanan+, 2007)J/MNRAS/371/495 : Catalog of 1806 MgII absorbers from SDSS DR3 (Bouche+, 2006)J/ApJ/639/766 : SDSS-DR3 strong MgII absorbers (Prochter+, 2006)J/AJ/127/2002 : Star Formation Rate of NFGS galaxies (Kewley+, 2004)http://www.sdss3.org/ : SDSS-III home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/221/32https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/221/32http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/221/32https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/221/32https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/221/32http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/221/32GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/221/32/table1 (Catalog of Mg II absorption systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/221/32/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/221/32/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/221/32/table1?GETtext/xml+votable180.050000true0.0386252.10611110.0055555555555555564/256 314 339 340 344 355 356 389 391 400 402 403 404 408 414 415 513 532 533 534 541 542 543 564 566 569 572 580 584 585 587 653 654 655 658 675 676 772 1108 1110 1114 1126 1129 1130 1137 1140 1173 1180 1626 1638 1641 1643 1644 1646 1690 1701 1706 1708 1713 1729 1789 1790 1791 2026 5/2 8 1028 1032 1070 1152 1154 1156 1157 1159 1160 1161 1162 1164 1166 1167 1178 1179 1180 1182 1184 1186 1187 1191 1192 1197 1198 1200 1201 1250 1273 1311 1333 1334 1335 1337 1338 1339 1340 1341 1343 1347 1348 1349 1350 1352 1353 1354 1364 1369 1380 1382 1385 1386 1387 1388 1414 1417 1419 1429 1430 1431 1434 1435 1436 1437 1438 1456 1457 1472 1474 1540 1549 1552 1554 1560 1585 1588 1590 1591 1597 1599 1604 1607 1624 1625 1627 1636 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28602 28603 28610 28611 31294 31295 31338 31343 31351 31354 31355 31373 31374 31375 31388 31390 31391 31405 31406 31412 31413 31414 31417 31418 31419 31424 31426 31427 31429 31430 31431 31433 31434 31435 31441 31442 31443 31453 31454 31461 31462 31463 31476 31477 31534 31535 31599 31616 31617 31619 31625 31626 31627 31628 31630 31633 31634 31635 31648 31649 31650 31652 31654 31655 31657 31669 31671 31696 31697 31698 31703 31704 31706 31707 31709 31710 31711 31721 31722 31723 31728 31729 31730 31740 31741 31743 32386 32390 32412 32414 32415 32445 32446 32447 32473 32474 32475 32480 32481 32483 32488 32489 32491 32509 32510 32511 32642 32672 32673 32674 32680 32682 32683 32696 32698 32699 36775 36784 36786 36793 36795 36798 36856 36857 36859 36862 36863 40951 40957 40958 40959 49117 49119https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/221/32?format=asciiOpticaldefaultJ/ApJS/221/32/table1Catalog of Mg II absorption systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS-DR9Q identifier (VII/269; HHMMSS.ss+DDMMSS.s; J2000)meta.id;meta.maincharPlateSDSS plate identifiermeta.id;instr.plateintMJD[55176/55752] Modified Julian Date of the observationdtime.epochintFiberSDSS fiber identifiermeta.idintzem[0.35/5.4] Redshift derived from emission linessrc.redshiftfloatzabs[0.29/2.7] Redshift derived from absorption linessrc.redshiftfloatEW2796[0.2/8.2] Rest equivalent width of MgII{lambda}2796 ({AA})0.1nmspect.line.eqWidthfloats2796[2/71] EW2796 divided by its 1{sigma} error; significance of MgII{lambda}2796 detectionstat.errorfloatEW2803[0.2/7.1] Rest equivalent width of MgII{lambda}2803 ({AA})0.1nmspect.line.eqWidthfloats2803[2/65] EW2803 divided by its 1{sigma} error; significance of MgII{lambda}2803 detectionstat.errorfloatSNR2796[1.9/63] Signal-to-noise ratio of MgII{lambda}2796 linestat.snrfloatSNR2803[1.9/60] Signal-to-noise ratio of MgII{lambda}2803 linestat.snrfloatbeta[-0.02/0.74] Relative velocity, {beta} (1)phys.veloc;arith.diffdoubleSpInteractive spectrum from SDSSmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.main