VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .

VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/ApJS/282/28
  Changing-Look AGN from DESI. V. (Chen+, 2026)
ReadMe+ftp
2026ApJS..282...28C
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJS/282/28/table3Catalog of changing-look (CL) quasars in this work (97 rows)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  SDSS (char) Unique identifier of SDSS object (JHHMMSS.ss+DDMMSS.s) (meta.id;meta.main)
  RAJ2000 deg (i) [7.4/360] Right Ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) [-7.7/56.4] Declination (J2000) (pos.eq.dec;meta.main)
  z   [0.9/3.3] Spectroscopic redshift (src.redshift)
  MJD-SDSS d [52591/59304] Modified Julian Date of SDSS spectrum (time.epoch)
  MJD-DESI d [59251.96/59737.3] Mean MJD of the coadded DESI spectra (time.epoch;stat.mean)
  Trans (char) Changing state between SDSS and DESI spectra (meta.code)
  MgII (char) State change in Mg II (meta.code)
  CIII (char) State change in C III (meta.code)
  CIV (char) State change in C IV (meta.code)

ALL cols		    
 (i)indexed column
  SiIV (char) State change in Si IV (meta.code)
  Lya (char) State change in Ly{alpha} (meta.code)
  logLBol-b [10-7W] [45.17/46.73] Log bolometric luminosity in bright state; erg/s (phys.luminosity;phot.flux.bol)
  e_logLBol-b [10-7W] [0/0.1] Uncertainty in logLBol-b (Note 1)   (stat.error;phys.luminosity;phot.flux.bol)
  logLBol-d [10-7W] [45/46.53] Log bolometric luminosity in dim state; erg/s (phys.luminosity;phot.flux.bol)
  e_logLBol-d [10-7W] [0/0.3] Uncertainty in logLBol-d (Note 1)   (stat.error;phys.luminosity;phot.flux.bol)
  EWMgII-b 0.1nm (n) [4/157] Equivalent Width of Mg II in bright state (spect.line.eqWidth)
  e_EWMgII-b 0.1nm (n) [1/9] Uncertainty in EWMgII-b (Note 1)   (stat.error;spect.line.eqWidth)
  EWMgII-d 0.1nm (n) [9/138] Equivalent Width of Mg II in dim state (spect.line.eqWidth)
  e_EWMgII-d 0.1nm (n) [0.8/20] Uncertainty in EWMgII-d (Note 1)   (stat.error;spect.line.eqWidth)
  EWCIII-b 0.1nm (n) [24.8/122] Equivalent Width of CIII] in bright state (spect.line.eqWidth)
  e_EWCIII-b 0.1nm (n) [0.6/11] Uncertainty in EWCIII-b (Note 1)   (stat.error;spect.line.eqWidth)
  EWCIII-d 0.1nm (n) [1.8/80] Equivalent Width of CIII] in dim state (spect.line.eqWidth)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  e_EWCIII-d 0.1nm (n) [0.7/18] Uncertainty in EWCIII-d (Note 1)   (stat.error;spect.line.eqWidth)
  EWCIV-b 0.1nm (n) [27/237] Equivalent Width of C IV in bright state (spect.line.eqWidth)
  e_EWCIV-b 0.1nm (n) [1/15] Uncertainty in EWCIV-b (Note 1)   (stat.error;spect.line.eqWidth)
  EWCIV-d 0.1nm (n) [10/163] Equivalent Width of C IV in dim state (spect.line.eqWidth)
  e_EWCIV-d 0.1nm (n) [1/19] Uncertainty in EWCIV-d (Note 1)   (stat.error;spect.line.eqWidth)
  FWHMMgII-b km/s (n) [2841/10565] FWHM of Mg II in bright state (spect.line.width)
  e_FWHMMgII-b km/s (n) [133/3541] Uncertainty in FWHMMgII-b (Note 1)   (stat.error;spect.line.width)
  FWHMMgII-d km/s (n) [2816/12919] FWHM of Mg II in dim state (spect.line.width)
  e_FWHMMgII-d km/s (n) [159/3921] Uncertainty in FWHMMgII-d (Note 1)   (stat.error;spect.line.width)
  FWHMCIV-b km/s (n) [3403/23339] FWHM of C IV in bright state (spect.line.width)
  e_FWHMCIV-b km/s (n) [120/8931] Uncertainty in FWHMCIV-b (Note 1)   (stat.error;spect.line.width)
  FWHMCIV-d km/s (n) [2820/12755] FWHM of C IV in dim state (spect.line.width)
  e_FWHMCIV-d km/s (n) [0/11496] Uncertainty in FWHMCIV-d (Note 1)   (stat.error;spect.line.width)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  FMgII-b 10-20W/m2(n) [12/787] Flux of Mg II in bright state; 10–17erg/s/cm2 (phot.flux;spect.line)
  e_FMgII-b 10-20W/m2(n) [3.9/28] Uncertainty in FMgII-b (Note 1)   (stat.error;phot.flux;spect.line)
  FMgII-d 10-20W/m2(n) [15/532] Flux of Mg II in dim state; 10–17erg/s/cm2 (phot.flux;spect.line)
  e_FMgII-d 10-20W/m2(n) [1.7/38] Uncertainty in FMgII-d (Note 1)   (stat.error;phot.flux;spect.line)
  FCIII-b 10-20W/m2(n) [68/700] Flux of C III] in bright state; 10–17erg/s/cm2 (phot.flux;spect.line)
  e_FCIII-b 10-20W/m2(n) [5/32] Uncertainty in FCIII-b (Note 1)   (stat.error;phot.flux;spect.line)
  FCIII-d 10-20W/m2(n) [2/346] Flux of C III] in dim state; 10–17erg/s/cm2 (phot.flux;spect.line)
  e_FCIII-d 10-20W/m2(n) [3.6/38] Uncertainty in FCIII-d (Note 1)   (stat.error;phot.flux;spect.line)
  FCIV-b 10-20W/m2(n) [121/1350] Flux of C IV in bright state; 10–17erg/s/cm2 (phot.flux;spect.line)
  e_FCIV-b 10-20W/m2(n) [9/72] Uncertainty in FCIV-b (Note 1)   (stat.error;phot.flux;spect.line)
  FCIV-d 10-20W/m2(n) [27/709] Flux of C IV in dim state; 10–17erg/s/cm2 (phot.flux;spect.line)
  e_FCIV-d 10-20W/m2(n) [4/34] Uncertainty in FCIV-d (Note 1)   (stat.error;phot.flux;spect.line)
  logMBH [Msun] [8.3/10.3] Log adopted fiducial black hole mass (phys.mass)
  e_logMBH [Msun] [0.02/0.4] Uncertainty in LogMBH (Note 1)   (stat.error;phys.mass)
  logREdd-b [-] [-2.2/-0.29] Logarithmic Eddington ratio in bright state (phys.luminosity;arith.ratio)
  e_logREdd-b [-] [0/0.1] Uncertainty in logREdd-b (Note 1)   (stat.error;phys.luminosity;arith.ratio)
  logREdd-d [-] [-2.6/-0.51] Logarithmic Eddington ratio in dim state (phys.luminosity;arith.ratio)
  e_logREdd-d [-] [0/0.05] Uncertainty in logREdd-d (Note 1)   (stat.error;phys.luminosity;arith.ratio)
  F1.4GHz mJy (n) [1.7/5.4] FIRST catalog 1.4GHz radio flux (phot.flux.density;em.radio.750-1500MHz)
  DESI  (n)Display data from DESI DR1 zcat (V/161) within 3" (meta.ref.url)
  Sloan  Display the online SDSS-DR19 data for the nearest object (meta.ref.url)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
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