J/ApJS/243/2ivo://CDS.VizieR/J/ApJS/243/2doi:10.26093/cds/vizier.22430002CDSChen Z.-F.Yi S.-X.Pang T.-T.Yi T.-F.Wang Z.-W.Mo X.-H.Liu C.-Q.2020-04-16T12:57:48Z2020-02-04T15:44:36ZCDS support team

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

cds-question@unistra.frline-intensitiesquasarsredshiftedvisible-astronomyspectroscopyUsing the quasar spectra from the Sloan Digital Sky Survey and with variable C IV absorption line systems, we measure the Si IV and N V absorption line systems. We obtain 50 variable Si IV absorption line systems and 39 variable N V absorption line systems. We find that the variations in most of the C IV, Si IV, and N V absorption lines are correlated with the changes in quasar continuum. In addition, a significant portion of the variable absorption lines are the consistent variations of multiple systems with large velocity separations. Therefore, the variations of the C IV, Si IV, and N V absorption lines could be mainly driven by the changes in quasar radiations, which cause changes in ionization states or column densities of absorbing gas. We also find that the variable C IV, Si IV, and N V absorption line systems can be divided into low-ionization systems and high-ionization systems. The former positively responds to the changes in the quasar's brightness, and the later is the oppositive case.2019ApJS..243....2Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/243/2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/279 : SDSS quasar catalog: twelfth data release (Paris+, 2017)J/ApJS/171/1 : Census of QSOs Narrow Absorption Lines (Misawa+, 2007)J/ApJ/777/168 : CIV and SiIV BAL troughs in SDSS (Filiz+, 2013)J/MNRAS/450/3904 : Quasars narrow absorption lines from SDSS (Chen+, 2015)J/ApJ/814/150 : Variability of SDSS broad absorption line QSOs (Wang+, 2015)J/ApJ/818/30 : Lag measurements for 15 z<0.8 QSOs from SDSS-RM (Shen+, 2016)J/ApJ/843/30 : MgII line vs 3000{AA} continuum analysis in 68 QSOsJ/ApJS/236/39 : CIV NAL systems in SDSS-DR14 (Chen+, 2018)J/ApJ/856/6 : SEAMBHs IX. 10 new H{beta} light curves (Du+, 2018)J/ApJ/862/22 : CIV BAL SDSS QSO obs. with Gemini (Rogerson+, 2018)J/ApJS/239/23 : CIV NAL systems from SDSS-DR14 quasar spectra (Chen+, 2018)http://www.sdss.org/ : SDSS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/243/2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/243/2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/243/2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/243/2https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/243/2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/243/2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/243/2/qsos (List of SDSS quasars from Tables 1 and 2; table added by CDS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/243/2/qsos?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/243/2/qsos?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/243/2/qsos?GETtext/xml+votable180.050000true0.817583317.94355560.0055555555555555566/0 2065 2075 2117 4115 4130 4149 4178 4229 4233 4255 4310 4428 4439 4484 4548 4667 4673 4686 4801 4825 4902 4903 4910 4934 4957 4975 4985 5012 5043 5061 5066 5112 5127 5167 5185 5234 5268 5270 5333 5337 5349 5409 5434 5504 5564 5569 5575 5585 5613 5659 5683 5688 5723 5808 5822 5849 5903 5915 5924 5971 5973 6022 6077 6093 6213 6403 6442 6491 6522 6563 6593 6607 6632 6634 6644 6651 7208 7225 7262 7283 7288 7301 7311 7320 7327 7331 7335 7452 7465 7471 7506 7517 7524 7525 7536 8215 8334 8342 8349 8437 8474 8495 8565 8581 8590 8727 8734 8738 8747 8836 8841 8918 8922 8939 8941 8945 8970 8997 8998 9040 9049 9067 9088 9091 9137 9317 9336 9365 9391 9394 9406 9410 9411 9415 9455 9512 9617 9639 9834 9893 9901 9966 10264 10313 10314 10327 10342 10350 10353 10372 10375 10393 10410 10530 10549 10602 10631 10642 10658 10729 10769 10793 10814 10875 10918 10941 10966 11005 11006 11036 11038 11044 11086 11098 11100 11110 11128 11180 11202 11204 11205 11256 11258 11280 11336 11337 11400 11784 11786 11789 11844 11850 11911 11912 11920 13327 17301 17511 17665 17745 17755 17757 17773 17828 17840 17982 18057 18069 18076 18077 18098 18113 18219 18236 18402 18834 19025 19036 19056 19087 19111 19386 19408 19412 19709 19802 19861 19865 19879 20055 20090 20151 20163 20249 20300 25939 25941 26004 26014 26023 26039 26073 26088 26094 26183 26257 26269 26276 26331 26339 26402 26427 26511 26527 26542 26621 26974 26988 27021 27041 27045 27052 27058 27109 27246 27299 27347 27437 27446 27500 27501 27520 27537 27542 27544 27549 27570 27573 27574 27593 27598 27605 27652 27694 27749 27761 27855 27899 27911 28202 28208 28219 28319 28330 28334 28398 28440 28479 28480 28506 28595 28610 28636 28637 28669 31374 31408 31469 31470 31531 31622 31719 31740 32429 32680 36781https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/243/2?format=asciiOpticaldefaultJ/ApJS/243/2/qsosList of SDSS quasars from Tables 1 and 2; table added by CDS_RAPositions from SDSS names (right ascension part)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS object name (HHMMSS.ss+DDMMSS.s; J2000)meta.id;meta.maincharprimaryzem[1.7/4.5] Quasar redshiftsrc.redshiftfloatSiIVDisplay the SiIV data for this SDSS (link to Table1)meta.ref.urlintnullableNVDisplay the NV data for this SDSS (link to Table2)meta.ref.urlintnullableCIVDisplay CIV data from Chen+, 2018, J/ApJS/239/23meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar_DEPositions from SDSS names (declination part)degpos.eq.dec;meta.mainJ/ApJS/243/2/table1Catalog of SiIV Absorption Line SystemsFiberSDSS spectra fiber IDmeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPair[1/358] ID number of a NAL pairmeta.idintSDSSSDSS object name (HHMMSS.ss+DDMMSS.s; J2000)meta.id;meta.maincharPlateSDSS spectra plate IDmeta.id;instr.plateintMJDSDSS spectra modified Julian Date of observationdtime.epochintzem[1.75/4.26] Redshift, quasarsrc.redshiftfloatzabs[1.73/4.14] Redshift, absorption line system, blue line of the SiIV doubletsrc.redshiftfloatEW1393[0.05/4] Equivalent width at rest frame, SiIV 1393{AA}0.1nmspect.line.eqWidthfloate_EW1393[0/0.6] Uncertainty in EW1393 (1)0.1nmstat.errorfloatEW1402[0.04/3.8] Equivalent width at rest frame, SiIV 1402{AA}0.1nmspect.line.eqWidthfloate_EW1402[0/0.7] Uncertainty in EW1402 (1)0.1nmstat.errorfloatF1350[6/422] Continuum 1350{AA} flux, rest frame; in 10^-17^erg/s/cm^2^/{AA} units1e-19W.m**-2.nm**-1phot.fluxfloate_F1350[0.2/5] Uncertainty in flux13501e-19W.m**-2.nm**-1stat.errorfloatVr[-4498/28417] Offset velocity, SiIV absorption line system to quasar redshift (G1)km/sphys.veloc;arith.diffintID[1/295] Identification number of the SiIV absorption line systemmeta.idintSys[-2/2]? System category (2)meta.codeintnullableSL[0/17.4]? Significance level of the variation (3)stat.fit.goodnessfloatnullableSpInteractive spectrum from SDSS-DR14meta.ref.urlcharJ/ApJS/243/2/table2Catalog of NV Absorption Line SystemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPair[1/292] Identification number of a NAL pairmeta.idintSDSSSDSS object name (HHMMSS.ss+DDMMSS.s; J2000)meta.id;meta.maincharPlateSDSS spectra plate IDmeta.id;instr.plateintMJDSDSS spectra modified Julian Date of observationdtime.epochintFiberSDSS spectra fiber IDmeta.idintzem[1.95/4.45] Redshift, quasarsrc.redshiftfloatzabs[1.90/4.37] Redshift, absorption line system, blue line of the NV doubletsrc.redshiftfloatEW1238[0.1/3.3] Equivalent width at rest frame, NV1238{AA}0.1nmspect.line.eqWidthfloate_EW1238[0.02/0.5] Uncertainty in EW1238 (1)0.1nmstat.errorfloatEW1242[0.09/3.3] Equivalent width at rest frame, NV1242{AA}0.1nmspect.line.eqWidthfloate_EW1242[0.01/0.5] Uncertainty in EW1242 (1)0.1nmstat.errorfloatF1350[2.5/291] Continuum flux, rest frame, 1350{AA}; in 10^-17^erg/s/cm^2^/{AA} units1e-19W.m**-2.nm**-1phot.fluxfloate_F1350[0.2/3] Uncertainty in flux13501e-19W.m**-2.nm**-1stat.errorfloatVr[-4382/5445] Offset velocity, NV absorption line system to quasar redshift (G1)km/sphys.veloc;arith.diffintID[1/257] Identification number of the NV absorption line systemmeta.idintSys[-1/1]? System category (2)meta.codeintnullableSL[0/13.1]? Significance level of the variation (3)stat.fit.goodnessfloatnullableSpInteractive spectrum from SDSS-DR14meta.ref.urlchar