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J/ApJ/874/8
  Follow-up spectroscopy of SDSS changing-look QSOs (Macleod+, 2019)
ReadMe+ftp
2019ApJ...874....8M
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJ/874/8/table2(c)Changing-look quasar (CLQ) candidates (262 rows)
2.J/ApJ/874/8/table3Spectral decomposition (108 rows)

Simple ConstraintList Of Constraints
 
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)SDSS (char) (i) SDSS identifier (HHMMSS.ss+DDMMSS.s; J2000) (meta.id;meta.main)
  (1)Sp (char) link to spectral decomposition (Table 3) (meta.ref.url)
  (1)z   [0.15/0.82] Spectroscopic redshift (src.redshift)
  (1)Ex?   [0/1] Morphology flag (1=extended or 0=point source) (meta.code)
  (1)MJD1p d [51075/56031] Modified Julian Date of first photometric observation (time.epoch)
  (1)gmag1 mag [16.2/22] First SDSS g band (AB) magnitude (phot.mag;em.opt.B)
  (1)e_gmag1 mag [0.005/0.1] Uncertainty in g1mag (stat.error;phot.mag)
  (1)MJD2p d [53655/56588] Modified Julian Date of second photometric observation (time.epoch)
  (1)gmag2 mag [15.9/22.8] Second SDSS g band (AB) magnitude (phot.mag;em.opt.B)
  (1)e_gmag2 mag [0.002/0.15] Uncertainty in g2mag (stat.error;phot.mag)

ALL cols		    
 (i)indexed column
  (1)MJD1s d [51630/55500] Modified Julian Date of first spectroscopic observation (time.epoch)
  (1)MJDPS1 d [55242/56625] Modified Julian Date of PS1 observation (time.epoch)
  (1)gmagPS1 mag [15.9/22.7] Pan-STARRS 1 g band (AB) magnitude (phot.mag;em.opt.B)
  (1)e_gmagPS1 mag [0.005/0.2] Uncertainty in gPS1mag (stat.error)
  (1)MJD2s d [0/58367] Modified Julian Date of second spectroscopic observation (Note 1)   (time.epoch)
  (1)Tel (char) Facility identifier (meta.id)
  (1)CLQ?   [0/1] Changing-look quasar by VI? (meta.code)
  (1)Nsigma  (n) [-1/11.9] Flux deviation at Hβ (stat.stdev;phot.flux)
  (1)PS1 (char) Display data from Pan-STARRS DR1 (II/349) within 1" (meta.ref.url)
  (1)Sloan (char) Display the online SDSS data for the nearest object (meta.ref.url)
  (1)Simbad (char) ask the Simbad data-base about this object (meta.ref.url)
  (1)NED (char) ask the NED data-base about this object (meta.ref.url)
  (1)_RA deg (i) Right Ascension (J2000) from SIMBAD (not part of the original data) (pos.eq.ra;meta.main)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)_DE deg (i) Declination (J2000) from SIMBAD (not part of the original data) (pos.eq.dec;meta.main)
  (2)L3240-1 10+35W [27/1595] Luminosity at 3240Å in first SDSS spectrum (phys.luminosity)
  (2)e_L3240-1 10+35W [0.5/47] Uncertainty in L3240-1 (stat.error)
  (2)l_LHb-1 (char) Limit fl on l_LHb-1 (meta.code.error)
  (2)LHb-1 10+35W [0.14/20] Luminosity at Hβ in first SDSS spectrum (phys.luminosity)
  (2)e_LHb-1 10+35W [0.03/2] Uncertainty in LHb-1 (stat.error)
  (2)L3240-2 10+35W [0/944] Luminosity at 3240Å in follow-up spectrum (phys.luminosity)
  (2)e_L3240-2 10+35W [0/38] Uncertainty in L3240-2 (stat.error)
  (2)l_LHb-2 (char) Limit flag on LHb-2 (meta.code.error)
  (2)LHb-2 10+35W [0.05/15] Luminosity at Hβ in follow-up spectrum (phys.luminosity)
  (2)e_LHb-2 10+35W [0/4] Uncertainty in LHb-2 (stat.error)

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