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NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  Sample of BL Lac objects from SDSS and FIRST (Plotkin+, 2008)
Post annotation
1.J/AJ/135/2453/BLLacObserved (table5) and derived (table6) parameters of BL Lac candidates (501 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 Name ( (;meta.main)
  Class (char) [BL? ] higher confidence BL Lac class (BL), or lower confidence BL Lac class (BL?) (src.class)
  N (char) [NSO] Source in NED as BL Lac? (Note 3)   (meta.code)
  umag mag SDSS u-band psf magnitude (phot.mag;em.opt.U)
  gmag mag SDSS g-band psf magnitude (phot.mag;em.opt.B)
  rmag mag SDSS r-band psf magnitude (phot.mag;em.opt.R)
  imag mag SDSS i-band psf magnitude (phot.mag;em.opt.I)
  zmag mag SDSS z-band psf magnitude (phot.mag;em.opt.I)
  z  (n) Redshift from SDSS spectroscopy (src.redshift)
  q_z (char) [LRTU] z quality (Note 4)   (meta.code.qual;src.redshift)

ALL cols
(n) indicates a possible blank or NULL column(i)indexed column
  C  (n) Measured H/K break strength (Note 5)   (spect.line.intensity)
  f1.4 mJy Integrated FIRST 1.4GHz observed flux density (phot.flux.density;
  Comm (char) Additional comments (Note 6)   (meta.note)
  SimbadName (char) Designation understandable by the Simbad data-base (
  NED  ask the NED data-base about this object
  logL5 [10-7W/Hz]Calculated monochromatic radio luminosity at rest frame 5GHz in erg/s/Hz (log scale) (phys.luminosity;;meta.modelled)
  Omag mag Extinction corrected optical magnitude in filter closest to rest frame 500nm (phot.mag;em.opt)
  logLopt [10-7W/Hz]Calculated monochromatic optical luminosity at rest frame 500nm (5000Å) (log scale) (phys.luminosity)
  X (char) [Y/N] Source is a RASS X-ray source? (Note 8)   (meta.code)
  Xrate ct/s RASS measured X-ray count rate (Note 8)   (phot.count;em.X-ray)
  logLx [10-7W/Hz]Calculated monochromatic X-ray luminosity at rest frame 1keV in erg/s/Hz (log scale) (Note 8)   (phys.luminosity)
  SI.RO  Broad-band radio/optical spectral index (spect.index)
  SI.OX  Broad-band optical/X-ray spectral index (spect.index)
  SI.RX  Broad-band radio/X-ray spectral index (spect.index)
  DR5  Details of the photometry from the SDSS-DR5 (meta.ref.url)
  RAJ2000 deg (i) Right Ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)

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