VizieR

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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/AJ/129/2542
  BL Lac from SDSS (Collinge+, 2005)
ReadMe+ftp
2005AJ....129.2542C
Similar Catalogs
Post annotation 		img(gal)
1.J/AJ/129/2542/proBL(c)Probable BL Lac candidates (tables 1 and 2 of paper) (10 rows)
2.J/AJ/129/2542/posBL(c)Possible BL Lac candidates (tables 3 and 4 of paper) (10 rows)
3.J/AJ/129/2542/table5(c)Potential radio-weak BL Lac candidates (27 rows)
Help Xmatch is

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
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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) SDSS designation (JHHMMSS.ss+DDMMSS.s) (meta.id;meta.main)
   (ALL)n_SDSS (char) [*] *: SDSS data using DR2 reductions were not available for the object (Note G1)   (meta.note)
  (1+2)umag mag SDSS u magnitude (phot.mag;em.opt.U)
  (1+2)e_umag mag rms uncertainty on umag (stat.error;phot.mag)
  (1+2)gmag mag SDSS g magnitude (phot.mag;em.opt.B)
  (1+2)e_gmag mag rms uncertainty on gmag (stat.error;phot.mag)
  (1+2)rmag mag SDSS r magnitude (phot.mag;em.opt.R)
  (1+2)e_rmag mag rms uncertainty on rmag (stat.error;phot.mag)
  (1+2)imag mag SDSS i magnitude (phot.mag;em.opt.I)
  (1+2)e_imag mag rms uncertainty on imag (stat.error;phot.mag)

ALL cols		    
 (i)indexed column
  (1+2)zmag mag SDSS z magnitude (phot.mag;em.opt.I)
  (1+2)e_zmag mag rms uncertainty on zmag (stat.error;phot.mag)
  (1+2)Ar mag Absorption in rband (Note 1)   (phys.absorption)
   (ALL)Morph (char) [pr] Optical morphology (Note G2)   (src.class.starGalaxy)
  (1+2)Target  Target code (Note 2)   (meta.id)
   (ALL)l_z (char) [≥ ] Limit flag on z (meta.code.error;src.redshift)
   (ALL)z  (n) Redshift (src.redshift)
   (ALL)u_z (char) [?] Uncertainty flag on z (meta.code.error;src.redshift)
   (ALL)pm mas/yr (n) Proper motion (pos.pm)
   (ALL)u_pm (char) [?] Uncertainty flag on pm (meta.code.error)
  (1+2)Ident (char) [Y/N] Previously reported in NED as a BL Lac object ? (meta.note)
   (ALL)SDSSdata (char) Display the SDSS data for this object (meta.ref.url)
  (1+2)NH 10+20cm-2Hydrogen column density (phys.columnDensity)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1+2)Xray (char) [BFU] X-ray match (Note 1)   (meta.note)
  (1+2)Sep1 arcsec (n) RASS Separation (pos.angDistance)
  (1+2)l_CR (char) Limit flag on CR (meta.code.error)
  (1+2)CR ct/s RASS Count rate (phot.count;em.X-ray)
  (1+2)e_CR ct/s (n) rms uncertainty on CR (stat.error)
  (1+2)Exp s RASS Exposition time (time.duration;obs.exposure)
  (1+2)l_F1keV (char) Limit flag on F1keV (meta.code.error)
  (1+2)F1keV 10-16W/m2/keVEnergy flux at 1keV (phot.flux;em.X-ray)
  (1+2)l_FX (char) Limit flag on FX (meta.code.error)
  (1+2)FX 10-16W/m2RASS X-ray flux (phot.flux;em.X-ray)
  (1+2)Sep2 arcsec (n) FIRST separation (pos.angDistance)
  (1+2)l_F1.4GHz (char) Limit flag on F1.4GHz (meta.code.error)
  (1+2)F1.4GHz mJy (n) FIRST flux at 1.4GHz (phot.flux.density;em.radio.750-1500MHz)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1+2)rms mJy (n) FIRST rms level appropriate to the object's coordinates (instr.det.noise)
  (1+2)Sep3 arcsec (n) NVSS separation (pos.angDistance)
  (1+2)F1.4GHz2 mJy (n) NVSS flux at 1.4GHz (phot.flux.density;em.radio.750-1500MHz)
  (1+2)e_F1.4GHz2 mJy (n) rms uncertainty on F1.4GHz2 (stat.error)
   (ALL)l_alphaOX (char) Limit flag on alphaOX (meta.code.error)
   (ALL)alphaOX  Spectral index between optical and X-ray (spect.index)
   (ALL)l_alphaRO (char) Limit flag on alphaRO (meta.code.error)
   (ALL)alphaRO  (n) Spectral index between radio and optical (spect.index)
  (1+2)Radio (char) Show nearby FIRST/NVSS sources (up to 10'') (meta.ref.url)
   (ALL)_RA deg (i) Position derived from SDSS name (right ascension part) (pos.eq.ra;meta.main)
   (ALL)_DE deg (i) Position derived from SDSS name (declination part) (pos.eq.dec;meta.main)
  (3)l_logL5GHz (char) Limit flag on logL5GHz (meta.code.error)
  (3)logL5GHz [10-7W/Hz](n) Luminosity at 5GHz (phys.luminosity;em.radio.3-6GHz)

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