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J/AJ/139/390
  Optically selected BL Lac objects from SDSS-DR7 (Plotkin+, 2010)
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img(gal)
1.J/AJ/139/390/RloudObserved and derived parameters of radio-loud BL Lac candidates (tables 5 and 7 of paper) (637 rows)

 
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) SDSS source name (HHMMSS.ss+DDMMSS.s) (Note 1)   (meta.id;meta.main)
  RAJ2000 deg (i) Right ascension (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) Declination (J2000) (pos.eq.dec;meta.main)
  Cl (char) [HL] High or Low-confidence Classification (Note 2)   (meta.code.qual)
  NB (char) [NY] Object appears as NED BL Lac object? (Note 3)   (meta.code)
  umag mag SDSS u-band apparent magnitude (phot.mag;em.opt.U)
  gmag mag SDSS g-band apparent magnitude (phot.mag;em.opt.B)
  rmag mag SDSS r-band apparent magnitude (phot.mag;em.opt.R)
  imag mag SDSS i-band apparent magnitude (phot.mag;em.opt.I)
  zmag mag SDSS z-band apparent magnitude (phot.mag;em.opt.I)

ALL cols
    
 (i)indexed column
  zsp  (n) Spectroscopic redshift (src.redshift)
  q_zsp (char) [LRTU] Redshift reliability (Note 4)   (meta.code.qual)
  C  (n) CaII H/K break strength (spect.line.intensity)
  alpha  Optical spectral index referenced at 616.5nm αν (spect.index)
  Comments (char) Additional comments (Note 5)   (meta.note)
  Sloan  Display the SDSS data for this BL Lac object (meta.ref.url)
  zgal  (n) Host galaxy redshift limit (Note 6)   (src.redshift)
  FAGN mag AGN component apparent magnitude (Note 7)   (phot.mag)
  logLo [10-7W/Hz]Log AGN component optical specific luminosity (Note 8)   (phys.luminosity;em.opt)
  f_F1.4 (char) [FNUX] Radio flag, U=upper limit (Note 9)   (meta.code)
  F1.4 mJy (n) Radio flux density at observed-frame 1.4GHz (Note 10)   (phot.flux.density;em.radio.750-1500MHz)
  logLr [10-7W/Hz](n) Log radio specific luminosity (Note 11)   (phys.luminosity;em.radio)
  f_FX (char) [RU] X-ray flag, U=upper limit (Note 12)   (meta.code)
  FX 10-16W/m2Unabsorbed X-ray flux in 10–13erg/scm2 (Note 13)   (phot.flux;em.X-ray)
  logLX [10-7W/Hz]Log X-ray specific luminosity (Note 14)   (phys.luminosity;em.X-ray)
  a(ro)  (n) Radio-optical spectral index αro (Note 15)   (spect.index)
  a(oX)  Optical-X-ray spectral index αoX (Note 16)   (spect.index)
  NED  ask the NED data-base about this object (meta.ref)

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