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J/MNRAS/307/293
 Quasars from 7C survey (Riley+, 1999)
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1.J/MNRAS/307/293/7CQSummary of the radio and optical properties of the candidate 7CQ quasars: main (table1) and subsidiary (table2) samples (237 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)
  T (char) Original table number: 1 for the main sample, 2 for the subsidiary sample (meta.id;meta.dataset)
  Note (char) [NRST*] Note (Note 1)   (meta.note)
  Name (char) Name of the source (HHMM+DDd), computed from the position (meta.id;meta.main)
  RAB1950 "h:m:s" Radio source right ascension (B1950) (Note 2)   (pos.eq.ra;meta.main)
  DEB1950 "d:m:s" Radio source declination (B1950) (pos.eq.dec;meta.main)
  Sep arcsec Separation of the 7C radio source position and the APM optical position (pos;arith.diff)
  Omag mag (n) POSS-1 O magnitude of the quasar candidate (phot.mag;em.opt.B)
  O-E mag (n) POSS-1 O-E colour index of the quasar candidate (phot.color;em.opt.B;em.opt.R)
  dRA s (n) Difference between the radio position and that of the quasar candidate (in the sense radio minus optical) (pos.eq.ra;arith.diff)
  dDE arcsec (n) Difference between the radio position and that of the quasar candidate (in the sense radio minus optical) (pos.eq.dec;arith.diff)

ALL cols
    
(n) indicates a possible blank or NULL column  
  S.15 mJy (n) Flux density at 151 MHz, from the 7C catalogue (phot.flux.density;em.radio.100-200MHz)
  S1.5 mJy (n) Flux density either at 1.49GHz from our own VLA observations (or 1.40GHz, see n_S1.5) (phot.flux.density;em.radio.750-1500MHz)
  n_S1.5 (char) [)] ): S1.5 contains 1.40GHz flux density from the NVSS survey (meta.note)
  f_S1.5 (char) [mc] Not in NVSS, or confusion (Note 3)   (meta.code)
  SI mJy (n) Spectral index between 151MHz and 1.49GHz (or 1.4 if n_SI=")")GHz (phot.flux.density;em.radio.100-200MHz)
  n_SI (char) [)] ): SI contains spectral index between 151MHz and 1.4GHz (meta.note)
  f_SI (char) [c] Source confusion (Note 3)   (meta.code)
  Score mJy (n) Flux density of the core at 1.49GHz (Note 4)   (phot.flux.density;em.radio)
  l_theta (char) [≤ ] Limit flag on theta (meta.code.error;pos.posAng)
  theta arcsec (n) Angular size of the source θ (phys.angSize)
  n_theta (char) [?)c] Note on theta (Note 5)   (meta.note)
  f_theta (char) [7C ] 7C if theta from the 7C catalogue (meta.code)
  Type (char) Optical type (Note 6)   (src.class)
  Rfl (char) Flags associated with the radio data (Note 7)   (meta.note)
  Rem (char) [*] * indicated a note in notes.dat file (meta.note)
  _RA.icrs "h:m:s" (n)Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
  _DE.icrs "d:m:s" (n)Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)

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