VizieR

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VizieR

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J/ApJ/889/44/stars UKIRT obs. of red supergiants in M31 (Neugent+, 2020)
UKIRT photometry M31 fields A and B (Table 2) and control field (Table 3) (206661 rows)
  recno=40168
Post annotation about this record
ColumnValue  Explain   (UCD)
_RAJ200000 40 28.1000 "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 50.000 "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 44.5775 "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 22.716 "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)
_Glon120.6943187 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-21.9935293 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)
40168recno 40168  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

FieldA  Field A, B or C=control field; column added by CDS (meta.id;obs.field)
RAJ200000 40 28.10 "h:m:s" (i) [0] Hour of Right Ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+40 49 50.0 "d:m:s" (i) [40/42] Degree of Declination (J2000) (pos.eq.dec;meta.main)
Jmag18.509 mag [6.3/20.5] Apparent J band magnitude (Note 1)   (phot.mag;em.IR.J)
e_Jmag 0.066 mag [0.001/0.4] The 1σ uncertainty in Jmag (stat.error;phot.mag)
Ksmag17.194 mag [5.3/18.5] Apparent Ks band magnitude (Note 1)   (phot.mag;em.IR.K)
e_Ksmag 0.048 mag [0.001/0.3] The 1σ uncertainty in Ksmag (stat.error;phot.mag)
J-Ks 1.315 mag [0.5/2] The (J-Ks) color index (phot.color;em.IR.J;em.IR.K)
e_J-Ks 0.081 mag [0.001/0.4] The 1σ uncertainty in J-Ks (stat.error;phot.color;em.IR.J)
Mm3   [0/3] Membership flag (Note 2)   (meta.code.error)
  
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