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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

  Hamburg/RASS Cat. of optical ident. V3.0 (Zickgraf+, 2003)
Post annotation
1.J/A+A/406/535/opticalOptical data (13829 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)
  RX (char) Name of the X-ray source (;meta.main)
  OC (char) [+] + for proposed optical counterpart (meta.code)
  NOpt  Running number of objects visible in the error circle ([ZEH2003] RX JHHMM.m+DDMM NN>) (
  n_NOpt (char) [P] (meta.note)
  RA2000 "h:m:s" (n)(i) Right ascension (2000.0) (pos.eq.ra;meta.main)
  DE2000 "d:m:s" (n)(i) Declination (2000.0) (pos.eq.dec;meta.main)
  oRA arcsec X-ray position - optical position in right ascension (pos.eq.ra;arith.diff)
  oDE arcsec X-ray position - optical position in declination (pos.eq.dec;arith.diff)
  rXO arcsec Distance between X-ray and optical position (pos.angDistance)
  l_Bmag (char) Limit flag on Bmag (Note 1)   (meta.code.error)
  Bmag mag (n) Optical magnitude B (no entry means no B magnitude available) (phot.mag;em.opt.B)
  n_Bmag (char) [uep:] Note on Bmag (Note 2)   (meta.note)
  B-R mag (n) B-R colour index from USNA-A 2.0 Catalog (I/252) (phot.color;em.opt.B;em.opt.R)
  Class (char) Classification from objective prism spectrum (Note 3)   (src.class)
  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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