VizieR

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VizieR

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J/A+A/406/535/optical Hamburg/RASS Cat. of optical ident. V3.0 (Zickgraf+, 2003)
Optical data (13829 rows)
  recno=3566
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ColumnValue  Explain   (UCD)
_RAJ200010 01 43.300 "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 49.00 "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 59.023 "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 17.45 "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)
_Glon217.797342 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+49.753000 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)
3566recno 3566  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RXJ1001.6+1724  Name of the X-ray source (meta.id;meta.main)
OC    [+] + for proposed optical counterpart (meta.code)
NOpt 2  Running number of objects visible in the error circle ([ZEH2003] RX JHHMM.m+DDMM NN>) (meta.id)
n_NOpt    [P] (meta.note)
RA200010 01 43.3 "h:m:s" (i) Right ascension (2000.0) (pos.eq.ra;meta.main)
DE2000+17 24 49 "d:m:s" (i) Declination (2000.0) (pos.eq.dec;meta.main)
oRA -40 arcsec X-ray position - optical position in right ascension (pos.eq.ra;arith.diff)
oDE -13 arcsec X-ray position - optical position in declination (pos.eq.dec;arith.diff)
rXO 42 arcsec Distance between X-ray and optical position (pos.angDistance)
l_Bmag   Limit flag on Bmag (Note 1)   (meta.code.error)
Bmag20.4 mag Optical magnitude B (no entry means no B magnitude available) (phot.mag;em.opt.B)
n_Bmagu   [uep:] Note on Bmag (Note 2)   (meta.note)
B-R 0.7 mag B-R colour index from USNA-A 2.0 Catalog (I/252) (phot.color;em.opt.B;em.opt.R)
ClassRED-WK  Classification from objective prism spectrum (Note 3)   (src.class)
Note   Note when no position (meta.note)
  
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