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VizieR

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IX/29/rass_fsc ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
The ROSAT All Sky Survey Faint Source Catalog (105924 rows)
  recno=18028
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ColumnValue  Explain   (UCD)
_RAJ200009 49 55.8000 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+51 21 11.520 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195009 46 36.4499 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+51 35 12.328 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon164.8516487 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+48.2926803 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
18028recno 18028  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

1RXSJ094955.8+512111  (i) ROSAT All-Sky Survey Catalogue source name (Note 1)   (meta.id;meta.main)
RAJ2000147.48250 deg (i) Right ascension (J2000), decimal degrees (pos.eq.ra;meta.main)
DEJ2000+51.35320 deg (i) Declination (J2000), decimal degrees (pos.eq.dec;meta.main)
PosErr 25 arcsec Total positional error (including 6" systematic error) (stat.error)
ScrFlagsF....   [T.F] screening flags (Note 2)   (meta.code)
NewFlag....   [T._] 'new data' flags (Note 3)   (meta.code)
Count 2.50e-02 ct/s Source countrate (Note 4)   (phot.count;em.X-ray)
e_Count 9.62e-03 ct/s Error on Count (Note 4)   (stat.error;phot.count)
bgCt 1.66e-03 ct/s/arcmin2 Background countrate (Note 4)   (arith.rate;instr.background;em.X-ray)
ExpTime 538 s Exposure time (time.duration;obs.exposure)
HR1-0.68   [-1/1] Hardness ratio 1 (Note 5)   (phot.flux;arith.ratio)
e_HR1 0.23   Error on HR1 (Note 6)   (stat.error)
HR2 1.00   [-1/1] hardness ratio 2 (Note 5)   (phot.flux;arith.ratio)
e_HR2 1.36   Error on HR2 (Note 6)   (stat.error)
Extent 23 arcsec Source extent, by which the source image exceeds the point spread function. (instr.det.psf)
L_Extent 1   Likelihood of source extent (Note 7)   (stat.likelihood)
Ldetect 8   Likelihood of source detection algorithm (Note 7)   (stat.likelihood)
ExtRad 300 arcsec Extraction radius (phys.angSize)
PrioFlags110011   [01] priority flags (Note 8)   (meta.code.error)
PHAb   [ABCDb] PHA range of best detection (Note 9)   (meta.code)
VigFactor 0.76   Vignetting factor (arith.factor)
IncDate2000-05-18 "Y:M:D" [000518] Date when source was included (Note 10)   (time.epoch)
Ncand 0  Number of identification candidates in the correlation catalogue (meta.number)
SASS33008018  Identification number of SASS field (Note 12)   (meta.id;obs.field)
MASOL 67  SASS source number (MASOL number) in SASS field (mainly for internal use) (meta.id)
src 0  Source number (meta.id)
ObsBeg1990-10-23T05:16 s Beginning of observation (year, offset 1900) (time.epoch)
ObsEnd1990-10-25T06:43 s Beginning of observation (year, offset 1900) (time.epoch)
Rel73   [0,99] Reliability of Source (stat.fit.goodness)
  
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