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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
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J/A+A/406/535
  Hamburg/RASS Cat. of optical ident. V3.0 (Zickgraf+, 2003)
Post annotation
img(gal)
1.J/A+A/406/535/x-ray(c)X-ray data (5341 rows)
2.J/A+A/406/535/optical(c)Optical data (13829 rows)
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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)
  (1)1RXS (char) Object name, 1RXS JHHMMSS.s+DDMMSS (meta.id)
  (1)1RXS_data (char) Link to all parameters of ROSAT All-Sky catalogues: bright and faint. (meta.note)
  (1)RASSCR ct/s RASS count rate (phot.count;em.X-ray)
  (1)e_RASSCR ct/s Error of count rate (stat.error)
  (1)HR1  Hardness ratio HR1 (Note 1)   (phot.flux;arith.ratio)
  (1)e_HR1  Error of HR1 (stat.error)
  (1)HR2  Hardness ratio HR2 (Note 1)   (phot.flux;arith.ratio)
  (1)e_HR2  Error of HR2 (stat.error)
  (1)Ext arcsec Source extension (phys.angSize;src)
  (1)L_Ext  Source extension likelihood (stat.likelihood)

ALL cols
    
 (i)indexed column
   (ALL)RX (char) (i) RASS name, RX JHHMM.m+DDMM, as used in the first catalogue version (meta.id;meta.main)
   (ALL)RA2000 "h:m:s" (i) Right ascension (2000.0) (pos.eq.ra;meta.main)
   (ALL)DE2000 "d:m:s" (i) Declination (2000.0) (pos.eq.dec;meta.main)
  (1)errPos arcsec Error radius derived from the BSC (stat.error)
  (1)Seq (char) Internal number of the HRC data base (meta.id)
  (1)Code  Type of source identification code (Note 2)   (src.class)
  (1)Flag1  (n) [0/1] 1: identification changed since last catalogue version (meta.code)
  (1)Flag2  (n) [0/1] 1: entries to this X-ray position have changed since last catalogue version (meta.code)
  (1)Flag3  (n) [0/1] 1: supplementary X-ray positions (meta.code)
  (1)Date "Y:M:D" (n) Date of last change (Note 3)   (time.epoch)
  (2)OC (char) [+] + for proposed optical counterpart (meta.code)
  (2)NOpt  Running number of objects visible in the error circle ([ZEH2003] RX JHHMM.m+DDMM NN>) (meta.id)
  (2)n_NOpt (char) [P] (meta.note)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (2)oRA arcsec X-ray position - optical position in right ascension (pos.eq.ra;arith.diff)
  (2)oDE arcsec X-ray position - optical position in declination (pos.eq.dec;arith.diff)
  (2)rXO arcsec Distance between X-ray and optical position (pos.angDistance)
  (2)l_Bmag (char) Limit flag on Bmag (Note 1)   (meta.code.error)
  (2)Bmag mag (n) Optical magnitude B (no entry means no B magnitude available) (phot.mag;em.opt.B)
  (2)n_Bmag (char) [uep:] Note on Bmag (Note 2)   (meta.note)
  (2)B-R mag (n) B-R colour index from USNA-A 2.0 Catalog (I/252) (phot.color;em.opt.B;em.opt.R)
  (2)Class (char) Classification from objective prism spectrum (Note 3)   (src.class)
  (2)Note (char) Note when no position (meta.note)

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