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IX/32/rosat ROSAT Bright Survey (Fischer+, 1998-2000)
The ROSAT Bright Survey (RBS) catalogue (2072 rows)
  recno=821
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ColumnValue  Explain   (UCD)
_RAJ200010 01 40.400 "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+17 24 32.00 "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 58 56.123 "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+17 39 00.35 "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)
_Glon217.797546 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+49.740542 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)
821recno 821  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RBS 821  (i) ROSAT Bright Survey number (meta.id)
1RXSJ100140.5+172436  1RXSJ X-ray coordinates (Cat. IX/10) (meta.id)
RAJ200010 01 40.4 "h:m:s" (i) Optical right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+17 24 32 "d:m:s" (i) Optical declination (J2000) (pos.eq.dec;meta.main)
Dist 4 arcsec Distance optical minus X positions (pos.angDistance)
e_Pos 8 arcsec X-ray positional uncertainty (1σ) as given in the 1RXS-catalog. The 90% confidence error radius is r90=1.65σ (stat.error)
CR 0.37 ct/s RASS countrate in the total ROSAT window 0.1-2.4keV (phot.count;em.X-ray)
CRH 0.19 ct/s RASS countrate in the hard ROSAT window 0.5-2.0keV (phot.count;em.X-ray)
HR1 0.01  hardness ratio (Note 1)   (phot.flux;arith.ratio)
HR2 0.08  hardness ratio (Note 1)   (phot.flux;arith.ratio)
NH 3.27 10+20cm-2 Galactic hydrogen column density (phys.columnDensity)
NameBD+18 2307  (Truncated) Name in optical catalogues (meta.id.assoc)
XClassSTAR  Class of X-ray source (Note 2)   (src.class)
TypeK0V/WUMA  Type within class (Note 2)   (src.class)
z    redshift (src.redshift)
u_z   Uncertainy flag on z (meta.code.error)
l_Mag   Limit flag on Mag (meta.code.error)
Mag 9.7 mag Optical brightness (typically in the V-band, sometimes only through spectrograph slit (phot.mag;em.opt.V)
u_Mag   Uncertainty flag on Mag (meta.code.error)
n_MagC   [CSNBDRE] Band and origin of magnitude (Note 3)   (meta.note)
FX 241 10-17W/m2 Flux in ROSAT X-ray band (phot.flux;em.X-ray)
logFX/Fo -2.37   log flux ratio X-ray to optical (phot.flux;arith.ratio)
logLX  10-7W log of X-ray luminosity (phys.luminosity;em.X-ray)
Note    [Y] Y: Note detailed in notes.dat file (meta.note)
  
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