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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

  M31 Chandra X-ray point sources (Kong+, 2002)
Post annotation
1.J/ApJ/577/738/table2(c)CHANDRA ACIS catalog of the central region of M31 (204 rows)
2.J/ApJ/577/738/table4Optical IDs (39 rows)
3.J/ApJ/577/738/table5Cross-Correlation of Chandra and ROSAT Sources (77 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)[KGP2002] (char) (i) Object identification (;meta.main)
   (ALL)CXOM31 (char) Chandra name (JHHMMSS.s+DDMMSS) (
  (1)RAJ2000 "h:m:s" (i) Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
  (1)DEJ2000 "d:m:s" (i) Degree of Declination (J2000) (pos.eq.dec;meta.main)
  (1)PosErr arcsec Positional error (stat.error)
  (1)NCts ct The net counts (phot.count;em.X-ray)
  (1)CRate 10-2ct/s The count rate in units of 10–2ct/s (phot.count;em.X-ray)
  (1)e_CRate 10-2ct/s Error in CRate (stat.error)
  (1)HR1  The first hardness ratio (Note 1)   (phot.flux;arith.ratio)
  (1)e_HR1  The error in HR1 (stat.error)

ALL cols
 (i)indexed column
  (1)HR2  The second hardness ratio (Note 2)   (phot.flux;arith.ratio)
  (1)e_HR2  The error in HR2 (stat.error)
  (1)LXray 10+30W The 0.3-7keV luminosity in units of 1037erg/s (Note 3)   (phys.luminosity;em.X-ray)
  (1)Notes (char) Additional notes (Note 4)   (meta.note)
  (2)MType (char) Morphological type (src.morph.type)
  (2)Ident (char) Identification (Note 1)   (
  (2+3)Off arcsec Radial offset between the catalogued object and the ACIS source (pos.angDistance)
  (2)Ident2 (char) Second identification (Note 1)   (
  (2)Off2 arcsec (n) Radial offset between the catalogued object and the ACIS source (pos.angDistance)
  (3)[PFJ93]  (n) ROSAT HRI Identification (Primini et al., 1993ApJ...410..615P (

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