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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

  
J/A+A/475/959
  X-ray properties of young stellar objects (Forbrich+, 2007)
ReadMe+ftp
2007A&A...475..959F
Similar Catalogs
Post annotation 		img(gal)
1.J/A+A/475/959/tablea1Complete source list with parameters determined by acis_extract for the energy range of 0.5-8keV (92 rows)

Simple ConstraintList Of Constraints
 
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)
  CXOJ (char) (i) CXOJ designation (HHMMSS.ss+DDMMSS.s) (meta.id;meta.main)
  n_CXOJ (char) [*] *: manually added source (meta.note)
  Counts ct Net (background-subtracted) counts (phot.count;em.X-ray)
  E_Counts ct Error on Counts (upper limit) (stat.error;stat.max)
  e_Counts ct Error on Counts (lower limit) (stat.error;phot.count)
  MedE keV Median photon energy (em.energy)
  Signi  Source significance (photometric S/N ratio) (stat.likelihood;obs)
  HR1  Hardness ratio HR1 (Note 1)   (phot.flux;arith.ratio)
  E_HR1  Error on HR1 (upper limit) (stat.error;stat.max)
  e_HR1  Error on HR1 (lower limit) (stat.error)

ALL cols		    
 (i)indexed column
  HR2  Hardness ratio HR2 (Note 1)   (phot.flux;arith.ratio)
  E_HR2  Error on HR2 (upper limit) (stat.error;stat.max)
  e_HR2  Error on HR2 (lower limit) (stat.error)
  HR3  Hardness ratio HR3 (Note 1)   (phot.flux;arith.ratio)
  E_HR3  (n) Error on HR3 (upper limit) (stat.error;stat.max)
  e_HR3  Error on HR3 (lower limit) (stat.error)
  X (char) X indicates the existence of optical or IR counterparts in table2 and/or a 2-temperature plasma model in tablea2 (meta.ref.url)
  Flux1 ct/cm2/s axis_extract estimate of the observed flux, which is done channel-wise (phot.flux;em.X-ray)
  Flux2 ct/cm2/s axis_extract estimate of the observed flux, which is done using an averaged value (phot.flux;em.X-ray)
  RelExp  Ratio of the summed exposure map values at the source position relative to the maximum value (Note 2)   (stat.fit.omc)
  Nobs  Number of observations in which a source was detected (Note 3)   (meta.number)
  _RA deg (i) Position (derived from CXO name (right ascension part) (pos.eq.ra;meta.main)
  _DE deg (i) Position (derived from CXO name (declination part) (pos.eq.dec;meta.main)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
Adapt form
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usage  Display UCD1+    UCD1  
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