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 ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
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1.IX/29/rass_fscThe ROSAT All Sky Survey Faint Source Catalog (105924 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)
  1RXS (char) ROSAT All-Sky Survey Catalogue source name (Note 1)   (;meta.main)
  RAJ2000 deg Right ascension (J2000), decimal degrees (pos.eq.ra;meta.main)
  DEJ2000 deg Declination (J2000), decimal degrees (pos.eq.dec;meta.main)
  PosErr arcsec (n) Total positional error (including 6" systematic error) (stat.error)
  ScrFlags (char) [T.F] screening flags (Note 2)   (meta.code)
  NewFlag (char) [T._] 'new data' flags (Note 3)   (meta.code)
  Count ct/s (n) Source countrate (Note 4)   (phot.count;em.X-ray)
  e_Count ct/s (n) Error on Count (Note 4)   (stat.error;phot.count)
  bgCt ct/s/arcmin2(n) Background countrate (Note 4)   (arith.rate;instr.background;em.X-ray)
  ExpTime s (n) Exposure time (time.duration;obs.exposure)

ALL cols
(n) indicates a possible blank or NULL column  
  HR1  (n) [-1/1] Hardness ratio 1 (Note 5)   (phot.flux;arith.ratio)
  e_HR1  (n) Error on HR1 (Note 6)   (stat.error)
  HR2  (n) [-1/1] hardness ratio 2 (Note 5)   (phot.flux;arith.ratio)
  e_HR2  (n) Error on HR2 (Note 6)   (stat.error)
  Extent arcsec Source extent, by which the source image exceeds the point spread function. (instr.det.psf)
  L_Extent  (n) Likelihood of source extent (Note 7)   (stat.likelihood)
  Ldetect  (n) Likelihood of source detection algorithm (Note 7)   (stat.likelihood)
  ExtRad arcsec (n) Extraction radius (phys.angSize)
  PrioFlags (char) [01] priority flags (Note 8)   (meta.code.error)
  PHA (char) [ABCDb] PHA range of best detection (Note 9)   (meta.code)
  VigFactor  (n) Vignetting factor (arith.factor)
  IncDate "Y:M:D" (n) [000518] Date when source was included (Note 10)   (time.epoch)
  Ncand  Number of identification candidates in the correlation catalogue (meta.number)
  SASS  Identification number of SASS field (Note 12)   (;obs.field)
  MASOL  SASS source number (MASOL number) in SASS field (mainly for internal use) (
  src  Source number (
  ObsBeg s Beginning of observation (year, offset 1900) (time.epoch)
  ObsEnd s Beginning of observation (year, offset 1900) (time.epoch)
  Rel   [0,99] Reliability of Source (

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

The following problems were encountered in this VizieR run:
**** -bg is an obsolete option
**** -bg is an obsolete option
**** -bg is an obsolete option
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.errorfile=/tmp/VR16236.err (2017-09-19T22:22:37)
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