J/MNRAS/434/1411ivo://CDS.VizieR/J/MNRAS/434/1411doi:10.26093/cds/vizier.74341411CDSWoo S.C.Turnshek D.A.Badenes C.Bickerton S.2024-07-22T20:13:32Z2017-08-24T14:58:57ZCDS support team

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

cds-question@unistra.frquasarsspectroscopyWe examine the variability of the high-ionization Ly{alpha} {lambda}1216 broad emission line (BEL) in a sample of 61 high-luminosity, high-redshift quasars observed at two epochs by the Sloan Digital Sky Survey. These bright objects lie in the redshift interval z=[2.5, 4.3] and have luminosities 3.4x10^45^<~{lambda}*L_{lambda}_<~3.4x10^46^erg/s at 1450{AA}. Utilizing improved spectrophotometric flux calibrations relative to nearby compact stars observed simultaneously, we are able to measure the flux changes in Ly{alpha} and the nearby continuum at two epochs. We find 20 objects that exhibit Ly{alpha} BEL flux variability at a significance level greater than 5{sigma} on time-scales ranging from days to years in the quasar rest frame.2013MNRAS.434.1411Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/434/1411CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.sdss.org : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/434/1411https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/434/1411http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/434/1411https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/434/1411https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/434/1411http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/434/1411GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/434/1411/table2 (BEL and continuum flux measurements for sixty-one quasars after recalibration using surrounding compact objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/434/1411/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/434/1411/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/434/1411/table2?GETtext/xml+votable180.050000true210.3095417-0.76027780.0055555555555555566/4587 4589 4929 5265 5270 6502 6620 6640 7254 7332 9335 9475 9512 9843 9846 10381-10383 10405 10744 11127 11246 11258 11347 11446 11449 11786 17749 17751 17766 17768 17981 18028 18063 18770 18800 18945 18949 19749 23186 23210 23218 23234 25941 25943 25959-25960 26002 26023 26197 26206 26305 26992 27074 27199 27285 314362.85864675833786e-19 1.5280350875291627e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/434/1411?format=asciiOpticaldefaultJ/MNRAS/434/1411/table2BEL and continuum flux measurements for sixty-one quasars after recalibration using surrounding compact objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS name (HHMMSS.ss+DDMMSS.s)meta.id;meta.maincharHMJDEpoch of HSN flux measurement (MJD)dtime.epochintLMJDEpoch of LSN flux measurement (MJD)dtime.epochintzemEmission redshiftsrc.redshiftfloatdtauRest-frame time interval between the two observation epochsdobs.param;obsdoublermagSDSS r magnitudemagphot.mag;em.opt.RfloatlL1450Galactic extinction-corrected luminosity at rest-frame 1450{AA} (lambda*L_lambda_)mW.m**-2phys.luminositydoubleFLyaHHSN-epoch flux at Lyman{alpha} BEL (1)1e-19W.m**-2.nm**-1phot.fluxdoublee_FLyaHrms uncertainty on FLyaH (1)1e-19W.m**-2.nm**-1stat.errorfloatFc1300HHSN-epoch flux continuum at 1300{AA} (1)1e-19W.m**-2.nm**-1phot.fluxfloate_Fc1300Hrms uncertainty on Fc1300H (1)1e-19W.m**-2.nm**-1stat.errorfloatFCIVHHSN-epoch flux at CIV BEL (1)1e-19W.m**-2.nm**-1phot.fluxfloate_FCIVHrms uncertainty on FCIVH(1)1e-19W.m**-2.nm**-1stat.errorfloatFc1600HHSN-epoch flux continuum at 1600{AA} (1)1e-19W.m**-2.nm**-1phot.fluxfloate_Fc1600Hrms uncertainty on Fc1600H (1)1e-19W.m**-2.nm**-1stat.errorfloatFLyaLLSN-epoch flux at Lyman{alpha} BEL (1)1e-19W.m**-2.nm**-1phot.fluxdoublee_FLyaLrms uncertainty on FLyaL (1)1e-19W.m**-2.nm**-1stat.errorfloatFc1300LLSN-epoch flux continuum at 1300{AA} (1)1e-19W.m**-2.nm**-1phot.fluxfloate_Fc1300Lrms uncertainty on Fc1300L (1)1e-19W.m**-2.nm**-1stat.errorfloatFCIVLLSN-epoch flux at CIV BEL (1)1e-19W.m**-2.nm**-1phot.fluxfloate_FCIVLrms uncertainty on FCIVL (1)1e-19W.m**-2.nm**-1stat.errorfloatFc1600LLSN-epoch flux continuum at 1600{AA} (1)1e-19W.m**-2.nm**-1phot.fluxfloate_Fc1600Lrms uncertainty on Fc1600L (1)1e-19W.m**-2.nm**-1stat.errorfloatSloanDisplay the SDSS data for this quasarmeta.ref.urlcharSimbadSimbad 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