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NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  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 (i) Right ascension of source (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) 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
 (i)indexed column
  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)
  DEc.deg deg Image center declination. (Note 2)   (pos.eq.dec)
  offset1 arcmin Offset of detected position from (RAc,DEc) (pos.angDistance)
  RAt.deg deg Target right ascension (Note 3)   (pos.eq.ra)
  DEt.deg deg Target declination (Note 3)   (pos.eq.dec)
  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
 (i)indexed column
  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
 (i)indexed column
  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
 (i)indexed column
  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
 (i)indexed column
  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
 (i)indexed column
  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
 (i)indexed column
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