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 The WGACAT version of ROSAT sources (White+ 1995)
This catalogue is obsoleted by IX/31
Post annotation
1.IX/12/wgacatThe catalogue (68907 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)
  1WGA (char) Name from this catalogue (;meta.main)
  RAJ2000 deg Right ascension of source (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg Declination of source (J2000) (pos.eq.dec;meta.main)
  Xpos pix The source coordinate in original pixels (pos.cartesian.x;instr.det)
  Ypos pix The source coordinate in original pixels (pos.cartesian.y;instr.det)
  GLON deg Galactic Longitude (pos.galactic.lon)
  GLAT deg Galactic Latitude (
  Count ct/s Background subtracted count rate accumulated in PHA bins 24 to 224 (0.24-2.0keV) (phot.count;em.X-ray)
  e_Count ct/s Mean error on Count (stat.error)
  Fx mW/m2 X-ray flux using a constant correction factor of 1.5x10–11 mW/m2 (erg/s/cm2). (phot.flux;em.X-ray)

ALL cols
  VigFactor  Telescope vignetting correction (Note 1)   (instr.param)
  ErrorRad arcsec 90% confidence source error radius. (stat.error)
  BoxSize arcsec Optimum source box size. (instr.param)
  RAc.deg deg Image center right ascension. (Note 2)   (pos.eq.ra;meta.main)
  DEc.deg deg Image center declination. (Note 2)   (pos.eq.dec;meta.main)
  offset1 arcmin Offset of detected position from (RAc,DEc) (pos.angDistance)
  RAt.deg deg Target right ascension (Note 3)   (pos.eq.ra;meta.main)
  DEt.deg deg Target declination (Note 3)   (pos.eq.dec;meta.main)
  offset2 arcmin Offset of detected position from (RAt,DEt) (pos.angDistance)
  OBJECT (char) Original field name as found in event list (obs.field)
  ROR   [100000/901000] number of unique sequences (
  StartDay "Y:M:D" Starting day of observation ("DDD" in 001-366 range) (time.epoch)
  EndDay "Y:M:D" Ending day of observation (time.epoch)

ALL cols
  Ndetect  Total number of detections in the image. (meta.number)
  IDno  The source number in the field (Note 4)   (
  ImageFile (char) FITS image file name (
  EventFile (char) Event file name (;meta.file)
  SourceID (char) Unique source identification (Note 5)   (
  PrBkg  Probability that the detection is a background fluctuation (
  SNR  The signal to noise ratio of the source (stat.snr)
  Qual   [1/10] Quality flag from bad to good (Note 6)   (meta.code.qual)
  Region (char) [I/O] Region of the ROSAT image (I=in, O=out) (meta.note)
  Zoom  Rebinning factor of the image (instr.param)
  Bgnd ct/pix/s Background count rate (instr.background)
  ExpTime s Exposure time of the field (time.duration;obs.exposure)
  SR1  Softness ratio 11-39/40-85 (Note 7)   (phot.flux;arith.ratio)

ALL cols
  e_SR1  Mean error on SR1 (stat.error)
  HR1  Hardness ratio 86-200/40-85 (Note 7)   (phot.flux;arith.ratio)
  e_HR1  Mean error on HR1 (stat.error)
  SR2  Hard softness ratio 50-86/87-129 (Note 7)   (phot.flux;arith.ratio)
  e_SR2  Mean error on SR2 (stat.error)
  HR2  Hard hardness ratio 130-240/87-129 (Note 7)   (phot.flux;arith.ratio)
  e_HR2  Mean error on HR2 (stat.error)
  Counts ct Total number of counts detected (meta.number)
  e_Counts ct Mean error on Counts (stat.error)
  Count1 ct Low band (11-39=0.1-0.4keV) counts (phot.count;em.X-ray)
  e_Count1 ct Mean error on Count1 (stat.error)
  Count2 ct Mid band (40-85=0.4-0.9keV) counts (phot.count;em.X-ray)
  e_Count2 ct Mean error on Count2 (stat.error)

ALL cols
  Count3 ct High band (86-200=0.92.0keV) counts (phot.count;em.X-ray)
  e_Count3 ct Mean error on Count3 (stat.error)
  Chi2  Variability test (Note 8)   (meta.code;src.var)
  XidFlag   [1] 1 if id with pre-Rosat X-ray source (meta.code)
  Xid1 (char) First name of X-ray identifier (
  Xid2 (char) 2nd name of X-ray identifier (
  Xid3 (char) 3rd name of X-ray identifier (
  IPCcount ct/s Count rate detected by the Einstein IPC. (phot.count;em.X-ray)
  e_IPCcount ct/s Mean error on IPCcount (stat.error)
  IPC/PSPC   Ratio of IPC/PSPC count rates. (phot.flux;arith.ratio)
  e_IPC/PSPC   Mean error on IPC/PSPC (stat.error)
  OIdFlag   [1] 1 if ID with optical source (meta.code)
  OId1 (char) First name of optical counterpart (

ALL cols
  OId2 (char) 2nd name of optical counterpart (
  OId3 (char) 3rd name of optical counterpart (
  OId4 (char) 4th name of optical counterpart (
  SIMBAD (char) Name in SIMBAD data-base (if existing) (
  Vmag mag V magnitude of any optical counterpart (phot.mag;em.opt.V)
  Fx/Fo   X-ray over optical flux ratio (phot.flux;arith.ratio)
  AoX   Optical to X-ray slope (spect.index)
  z   Redshift of counterpart (src.redshift)
  Class (char) Source classification (src.class)
  RIdFlag   [1] 1 if ID with radio source (meta.code)
  RId1 (char) First name of radio source (
  RId2 (char) First name of radio source (
  IRAS (char) Name in IRAS (II/125 or II/156) (

ALL cols
  IdCat (char) [HIC ] Catalog used for optical position (Note 9)   (;meta.dataset)
  IDoffset arcmin Offset of Id star from ROSAT position (pos.angDistance)
  oRA arcmin Offset from reference star (Note 9)   (pos.eq.ra;arith.diff)
  oDE arcmin Offset from reference star (Note 9)   (pos.eq.dec;arith.diff)
  WGAversion   [1] Version of WGACAT (meta.code)
  MPEname (char) Name in MPE catalog IX/11 (
  MPEflag   [1,3] Comparison with MPE IX/11 (Note 10)   (meta.code)
  MPEcount ct/s Count from MPE (phot.count;em.X-ray)
  e_MPEcount ct/s Mean error on MPEcount (stat.error)
  NH21cm cm-2 21cm number of H from Starke et al. (phys.columnDensity)
  B-V mag B-V colour (phot.color;em.opt.B;em.opt.V)

ALL cols
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