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VizieR

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J/AJ/131/2478/table4 M31 and M33 UBVRI photometry (Massey+, 2006)
M31 Catalog (371781 rows)
  recno=45390
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ColumnValue  Explain   (UCD)
_RAJ200000 40 27.7600 "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+40 49 29.300 "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 37 44.2409 "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+40 33 02.012 "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)
_Glon120.6928790 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-21.9992239 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)
45390recno 45390  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
n_LGGS   S indicates that spectroscopic data are available in table8 (meta.ref.url)

LGGSJ004027.76+404929.3  (i) LGGS designation, JHHMMSS.ss+DDMMSS.s (meta.id;meta.main)
Vmag21.810 mag Johnson V magnitude (phot.mag;em.opt.V)
e_Vmag 0.025 mag V error (stat.error;phot.mag;em.opt.V)
B-V 0.727 mag Johnson B-V magnitude (phot.color;em.opt.B;em.opt.V)
e_B-V 0.039 mag B-V error (stat.error;phot.color;em.opt.B)
U-B-0.155 mag Johnson U-B colour index (phot.color;em.opt.U;em.opt.B)
e_U-B 0.051 mag U-B error (stat.error;phot.color;em.opt.U)
V-R 0.569 mag Kron-Cousins V-R colour index (phot.color;em.opt.V;em.opt.R)
e_V-R 0.031 mag V-R error (stat.error;phot.color;em.opt.V)
R-I 0.733 mag Kron-Cousins R-I colour index (phot.color;em.opt.R;em.opt.I)
e_R-I 0.019 mag R-I error (stat.error;phot.color;em.opt.R)
nV 6  Number of V measurements (meta.number)
nB 7  Number of B measurements (meta.number)
nU 4  Number of U measurements (meta.number)
nR 7  Number of R measurements (meta.number)
nI 6  Number of I measurements (meta.number)
SpType   MK Spectral Type (if available) (src.spType)
r_SpType   References for spectal type, in refs.dat file (meta.ref;pos.frame)
RAJ200000 40 27.76 "h:m:s" (i) Right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+40 49 29.3 "d:m:s" (i) Declination (J2000) (pos.eq.dec;meta.main)
  
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