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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

  Orion Trapezium area ROSAT PSPC obs. II. (Lohother/mann+, 2000)
Post annotation
1.J/AN/321/81/table1(c)Properties of ROSAT PSPC X-ray sources in the Orion Trapezium area (316 rows)
2.J/AN/321/81/notesRemarks on individual sources (table2) (239 rows)

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)
   (ALL)ROS-ORI  (i) [1/316] Sequential number (Note 1)   (;meta.main)
  (1)n_ROS-ORI (char) [*] indicates a note in notes.dat file (meta.note)
  (1)RAJ2000 "h:m:s" (i) Right ascension (J2000.0) (pos.eq.ra;meta.main)
  (1)DEJ2000 "d:m:s" (i) Declination (J2000.0) (pos.eq.dec;meta.main)
  (1)phi arcmin Off-axis angle (instr.offset)
  (1)eta ct/ks Source count rate (phot.count;em.X-ray)
  (1)S/N  Signal to noise ratio (stat.snr)
  (1)RX arcsec Apparent source radius (Note 2)   (phys.angSize)
  (1)HR2  Hardness ratio HR2 (Note 3)   (phot.flux;arith.ratio)
  (1)e_HR2  rms uncertainty on HR2 (stat.error)
  (1)Var (char) [PV] Variablity type (Note 4)   (meta.note)
   (ALL)Rem (char) Remarks (Note 5)   (meta.note)

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