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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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J/A+A/323/739
  ROSAT detected quasars. II. (Brinkmann+ 1997)
ReadMe+ftp
1997A&A...323..739B
Similar Catalogs
Post annotation 		img(gal)
1.J/A+A/323/739/table1(c)DELTA(VLA-RASS)<40" unidentified RGB sources (813 rows)
2.J/A+A/323/739/table2(c)40"<DELTA(VLA-RASS)<100" unidentified RGB sources (303 rows)
3.J/A+A/323/739/table3(c)DELTA(VLA-RASS)<100" unidentified RGB sources, low resolution data (311 rows)
4.J/A+A/323/739/table4(c)Previously unidentified RGB sources: VLA empty fields (72 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.
   (ALL)ROSAT (char) ROSAT name
   (ALL)RAJ2000 "h:m:s" VLA right ascension (J2000.0)
   (ALL)DEJ2000 "d:m:s" VLA declination(J2000.0)
   (ALL)DXrad arcsec Angular separation of the VLA radio source and the X-ray source
  (1+2+3)fr Jy 5GHz VLA flux density from L97 (Note 1)   
   (ALL)FX 10-15W/m20.1 - 2.4 keV X-ray flux
   (ALL)e_FX 10-15W/m2rms uncertainty on FX
   (ALL)Gamma  (n) X-ray photom index
   (ALL)e_Gamma  (n) Error in Gamma (lower limit)
   (ALL)E_Gamma  (n) Error in Gamma (upper limit)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1+2+3)Emag mag (n) E magnitude of the closest optical counterpart from digitized POSS plates (blank: no plate is available)
  (1+2+3)n_Emag (char) [e] e: empty fields
  (1+2+3)clE  (n) [-1/2] Optical classification (Note 2)   
  (1+2+3)Omag mag (n) O magnitude of the closest optical counterpart from digitized POSS plates (blank: no plate is available)
  (1+2+3)n_Omag (char) [e] e: empty fields
  (1+2+3)clO  (n) [-1/2] Optical classification
  (1+2+3)DVLAOpt arcsec (n) Positional difference between the VLA source and the optical object
  (1+2+3)E (char) [*] *: the radio source has been re-observed with the Effelsberg telescope (Reich et al., in prep.)
  (1+2+3)Notes (char) [ibgq] Notes (Note 3)   
  (1+2+3)r_Notes (char) References (Note 4)   
  (4)log(NH) [cm-2] log (Galactic N_H)
  (4)F5GHz Jy 87GB 5GHz radio flux in Jy
  (4)Comm (char) Comment on possible source identification

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