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VizieR

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VII/158/table1 Revised and Updated Catalog of Quasi-stellar Objects (Hewitt+ 1993)
The catalogue (22484 rows)
  recno=16748
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ColumnValue  Explain   (UCD)
_RAJ200015 12 50.5283 "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 05 59.493 "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)
_RAB195015 10 08.9007 "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)
_DEB1950-08 54 47.203 "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)
_Glon351.2893137 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+40.1388249 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)
16748recno 16748  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
M0  1 for the rows belonging to the original table 1 (main description of the QSO) (meta.note)

CooDes1510-089  Designation based on 1950 Coordinates (Note 1)   (meta.id;meta.main)
RA195015 10 08.90 "h:m:s" (i) Right Ascension 1950 (Note 1)   (pos.eq.ra;meta.main)
DE1950-08 54 47.2 "d:m:s" (i) Declination 1950 (Note 1)   (pos.eq.dec;meta.main)
BLLac    [B] "B" indicates a BL Lac object (Note 1)   (meta.note)
Sel+   [RXSVCO +] Selection technique(s) (Note 2)   (meta.note)
Id   Other name (meta.id)
V  mag Apparent magnitude; often only mpg (phot.mag;em.opt.V)
var    [*] * indicates a variability (meta.note)
B-V  mag B-V (phot.color;em.opt.B;em.opt.V)
U-B  mag U-B (phot.color;em.opt.U;em.opt.B)
z(em)    Emission redshift (src.redshift)
u_z(em)    [)] Uncertainty flag on z(em) (meta.code.error)
n_z(em)    [*+] Note on z(em) (Note 3)   (meta.note)
Element   Emission line on which the redshift is based (element name) (meta.id;phys.atmol.element)
Wl  0.1nm Wavelength of Emission element (Angstroem) (em.wl)
z(abs)    Absorption redshift (src.redshift)
r_Id    Reference for identification (meta.ref;pos.frame)
r_z(em)    Reference for emission redshift (meta.ref;pos.frame)
ref_b    [b*] Addition to r_z(em) (Note 5)   (meta.code)
r_var    Reference for variability (meta.ref;pos.frame)
r_Sel    Reference for Radio (meta.ref;pos.frame)
r_z(abs)    Reference for absorption redshift (meta.ref;pos.frame)
Notes   Notes (Note 4)   (meta.note)

_RA.icrs15 12 50.53 "h:m:s" (i) Right ascension (ICRS) (computed by VizieR, not part of the original data) (pos.eq.ra)
_DE.icrs-09 05 59.5 "d:m:s" (i) Declination (ICRS) (computed by VizieR, not part of the original data) (pos.eq.dec)
  
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