CfA VizieR . ADAC VizieR . CADC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . Beijing (Ch) VizieR .


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

  NGC1893 Chandra X-ray catalog (Caramazza+, 2012)
Post annotation
1.J/A+A/539/A74/catalog(c)NGC1893 Chandra X-ray catalog: basic source properties (1021 rows)
2.J/A+A/539/A74/uplimit(c)Upper limit to the X-ray luminosities for NGC1893 X-ray undetected members (158 rows)
Help Xmatch is

Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortJoin tables
more join
Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  (1)Seq  Identification number (;meta.main)
  (1)Name (char) IAU Designation ( (
   (ALL)RAJ2000 deg (i) X-ray Right ascension (J2000) (pos.eq.ra;meta.main)
   (ALL)DEJ2000 deg (i) X-ray Declination (J2000) (pos.eq.dec;meta.main)
  (1)e_pos arcsec Standard deviation of position (stat.error)
  (1)OffAxis arcmin Off-axis angle (instr.offset)
  (1)CTn ct Net counts extracted in the total energy band (phot.count;em.X-ray)
  (1)e_CTn ct Average of the upper and lower 1 sigma errors (stat.error)
  (1)CTbg ct Background counts expected in the source extraction region (total band) (instr.background;obs.field)
  (1)PSFf   [0/1] Fraction of the PSF (at 1.497keV) enclosed within the extraction region (instr.det.psf)

ALL cols
 (i)indexed column
  (1)Signi  Photometric significance computed as net counts divided by the upper error on net counts (meta.note)
  (1)PKS  (n) [0/1] Kolmogorov-Smirnov probability that the lightcurves of the sources are constant (
  (1)t.exp ks Effective exposure time (time.duration;obs.exposure)
  (1)Emed keV (n) Background-corrected median photon energy (total band) (
  (1)logLX [10-7W] (n) Absorption-corrected X-ray luminosities (phys.luminosity;em.X-ray)
  (1)r_logLX (char) X-ray Luminosity origin (Note 1)   (meta.ref;pos.frame)
  (2)ID  Prisinzano et al. (2011, Cat. J/A+A/527/A77) identification number (meta.ref;pos.frame)
  (2)logTX [10-7W] Estimated upper limit to the absorption-corrected X-ray luminosities (phys.luminosity;em.X-ray)

ALL cols
(n) indicates a possible blank or NULL column(i)indexed column
Adapt form
Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  
elapse time 0

Thanks for acknowledging the VizieR Service
Rules of usage of VizieR data

© Université de Strasbourg/CNRS

    • Contact