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=3567
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ColumnValue  Explain   (UCD)
_RAJ200010 01 39.800 "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 25 31.00 "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 55.511 "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 59.32 "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)
_Glon217.772613 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+49.744373 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)
3567recno 3567  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 3  Running number of objects visible in the error circle ([ZEH2003] RX JHHMM.m+DDMM NN>) (meta.id)
n_NOpt    [P] (meta.note)
RA200010 01 39.8 "h:m:s" (i) Right ascension (2000.0) (pos.eq.ra;meta.main)
DE2000+17 25 31 "d:m:s" (i) Declination (2000.0) (pos.eq.dec;meta.main)
oRA 10 arcsec X-ray position - optical position in right ascension (pos.eq.ra;arith.diff)
oDE -55 arcsec X-ray position - optical position in declination (pos.eq.dec;arith.diff)
rXO 56 arcsec Distance between X-ray and optical position (pos.angDistance)
l_Bmag>  Limit flag on Bmag (Note 1)   (meta.code.error)
Bmag19.0 mag Optical magnitude B (no entry means no B magnitude available) (phot.mag;em.opt.B)
n_Bmag    [uep:] Note on Bmag (Note 2)   (meta.note)
B-R  mag B-R colour index from USNA-A 2.0 Catalog (I/252) (phot.color;em.opt.B;em.opt.R)
ClassOVERLAP  Classification from objective prism spectrum (Note 3)   (src.class)
Note   Note when no position (meta.note)
  
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