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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

  Optically selected BL Lac objects from SDSS-DR7 (Plotkin+, 2010)
Post annotation
1.J/AJ/139/390/Rloud(c)Observed and derived parameters of radio-loud BL Lac candidates (tables 5 and 7 of paper) (637 rows)
2.J/AJ/139/390/Rquiet(c)Observed and derived parameters of weak-featured radio-quiet objects (tables 6 and 8 of paper) (86 rows)
Help Xmatch is

Query by Constraints constraints help applied on Columns (Output Order: + - )
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Column  Constraint Explain   (UCD)
   (ALL)alpha  Optical spectral index referenced at 616.5nm αν (spect.index)
   (ALL)a(oX)  Optical-X-ray spectral index αoX (Note 16)   (spect.index)
   (ALL)a(ro)  (n) Radio-optical spectral index αro (Note 15)   (spect.index)
   (ALL)C  (n) CaII H/K break strength (spect.line.intensity)
   (ALL)Cl (char) [HL] High or Low-confidence Classification (Note 2)   (meta.code.qual)
   (ALL)Comments (char) Additional comments (Note 5)   (meta.note)
   (ALL)DEJ2000 deg (i) Declination (J2000) (pos.eq.dec;meta.main)
   (ALL)F1.4 mJy (n) Radio flux density at observed-frame 1.4GHz (Note 10)   (phot.flux.density;
   (ALL)FAGN mag AGN component apparent magnitude (Note 7)   (phot.mag)
   (ALL)f_F1.4 (char) [FNUX] Radio flag, U=upper limit (Note 9)   (meta.code)
   (ALL)f_FX (char) [RU] X-ray flag, U=upper limit (Note 12)   (meta.code)

ALL cols
(n) indicates a possible blank or NULL column(i)indexed column
   (ALL)FX 10-16W/m2Unabsorbed X-ray flux in 10–13erg/scm2 (Note 13)   (phot.flux;em.X-ray)
   (ALL)gmag mag SDSS g-band apparent magnitude (phot.mag;em.opt.B)
   (ALL)imag mag SDSS i-band apparent magnitude (phot.mag;em.opt.I)
   (ALL)logLo [10-7W/Hz]Log AGN component optical specific luminosity (Note 8)   (phys.luminosity;em.opt)
   (ALL)logLr [10-7W/Hz](n) Log radio specific luminosity (Note 11)   (phys.luminosity;
   (ALL)logLX [10-7W/Hz]Log X-ray specific luminosity (Note 14)   (phys.luminosity;em.X-ray)
   (ALL)NB (char) [NY] Object appears as NED BL Lac object? (Note 3)   (meta.code)
   (ALL)NED (char) ask the NED data-base about this object (meta.ref)
   (ALL)q_zsp (char) [LRTU] Redshift reliability (Note 4)   (meta.code.qual)
   (ALL)RAJ2000 deg (i) Right ascension (J2000) (pos.eq.ra;meta.main)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)rmag mag SDSS r-band apparent magnitude (phot.mag;em.opt.R)
   (ALL)SDSS (char) SDSS source name ( (Note 1)   (;meta.main)

ALL cols
(n) indicates a possible blank or NULL column(i)indexed column
   (ALL)Sloan (char) Display the SDSS data for this BL Lac object (meta.ref.url)
   (ALL)umag mag SDSS u-band apparent magnitude (phot.mag;em.opt.U)
   (ALL)zgal  (n) Host galaxy redshift limit (Note 6)   (src.redshift)
   (ALL)zmag mag SDSS z-band apparent magnitude (phot.mag;em.opt.I)
   (ALL)zsp  (n) Spectroscopic redshift (src.redshift)

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