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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

  
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/proBLProbable BL Lac candidates (tables 1 and 2 of paper) (10 rows)

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

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

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  Xray (char) [BFU] X-ray match (Note 1)   (meta.note)
  Sep1 arcsec (n) RASS Separation (pos.angDistance)
  l_CR (char) Limit flag on CR (meta.code.error)
  CR ct/s RASS Count rate (phot.count;em.X-ray)
  e_CR ct/s (n) rms uncertainty on CR (stat.error)
  Exp s RASS Exposition time (time.duration;obs.exposure)
  l_F1keV (char) Limit flag on F1keV (meta.code.error)
  F1keV 10-16W/m2/keVEnergy flux at 1keV (phot.flux;em.X-ray)
  l_FX (char) Limit flag on FX (meta.code.error)
  FX 10-16W/m2RASS X-ray flux (phot.flux;em.X-ray)
  Sep2 arcsec (n) FIRST separation (pos.angDistance)
  l_F1.4GHz (char) Limit flag on F1.4GHz (meta.code.error)
  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
  rms mJy (n) FIRST rms level appropriate to the object's coordinates (instr.det.noise)
  Sep3 arcsec (n) NVSS separation (pos.angDistance)
  F1.4GHz2 mJy (n) NVSS flux at 1.4GHz (phot.flux.density;em.radio.750-1500MHz)
  e_F1.4GHz2 mJy (n) rms uncertainty on F1.4GHz2 (stat.error)
  l_alphaOX (char) Limit flag on alphaOX (meta.code.error)
  alphaOX  Spectral index between optical and X-ray (spect.index)
  l_alphaRO (char) Limit flag on alphaRO (meta.code.error)
  alphaRO  (n) Spectral index between radio and optical (spect.index)
  Radio  Show nearby FIRST/NVSS sources (up to 10'') (meta.ref.url)
  _RA deg (i) Position derived from SDSS name (right ascension part) (pos.eq.ra;meta.main)
  _DE deg (i) Position derived from SDSS name (declination part) (pos.eq.dec;meta.main)

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