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J/MNRAS/274/1194/table1 Optical Identifications of ROSAT EUV Sources (Mason+ 1995)
WFC optical identification programme ID summary (209 rows)
  recno=5
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ColumnValue  Explain   (UCD)
_RAJ200000 44 01.1600 "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+09 33 02.200 "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)
_RAB195000 41 25.3398 "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+09 16 37.549 "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)
_Glon119.8722926 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-53.2770601 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)
5recno 5  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Name2RE J004403+093406  Source name (meta.id)
l_S1   Limit flag on S1 (meta.code.error)
S1 16.2 ct/ks WFC survey filter S1 (60-140A) counts (phot.count;em.X-ray)
l_S2   Limit flag on S2 (meta.code.error)
S2 12.8 ct/ks WFC survey filter S2 (110-200A) counts (phot.count;em.X-ray)
NH 4.5 10+20cm-2 Galactic Hydrogen column density (phys.columnDensity)
RAJ200000 44 01.16 "h:m:s" (i) Right ascension J2000 (pos.eq.ra;meta.main)
DEJ2000+09 33 02.2 "d:m:s" (i) Declination J2000 (pos.eq.dec;meta.main)
n_DEJ2000    [g:] A 'g' indicates that the data are from the Hubble Space Telescope Guide Star Catalog (meta.note)
Vmag 9.80 mag V magnitude of the optical counterpart (phot.mag;em.opt.V)
Vmag2  mag Upper limit of Vmag when n_Vmag2='-' (phot.mag;em.opt.V)
u_Vmag   Uncertainty flag on Vmag (meta.code.error)
n_Vmag(G)  Note on Vmag (Note 1)   (meta.note)
B-V  mag B-V color index of the optical counterpart (phot.color;em.opt.B;em.opt.V)
SpTypeK1-3V  Spectral type of the optical counterpart (src.spType)
l_alpha   Limit flag on alpha (meta.code.error;pos.eq.ra)
alpha 1.16   Source apparent EUV to optical flux ratio (phot.flux;arith.ratio)
ClassStar  Identification class (Note 2)   (src.class)
EWCa 1.10 0.1nm Equivalent width of the Ca H 3933A chromospheric emission line (for stars only) (spect.line.eqWidth)
n_EWCa    [u-] Note on EWCa (Note 3)   (meta.note)
EWHa  0.1nm Equivalent width of the Halpha line (for stars only) (spect.line.eqWidth)
n_EWHa    [?u-] Note on EWHa (Note 3)   (meta.note)
FWHb  10+3km/s Full width at half maximum of the Hbeta line (spect.line.width)
EWHb  0.1nm Equivalent width of the Hbeta line (spect.line.eqWidth)
u_EWHb   Uncertainty flag on EWHb (meta.code.error)
Xy   [y] y: there is an X-ray telescope position available for the source (meta.note)
Note+   [+] +: additional information in appena file (meta.note)
ComBD+08 102  Comments (meta.note)
  
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