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J/AJ/143/70/table8 Differential reddening in Milky Way globulars (Alonso-Garcia+, 2012)
Differential reddening, with respect to our ridgeline extinction zero points, of a selected set of coordinates across the field of our sampled clusters (839211 rows)
  recno=34155
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ColumnValue  Explain   (UCD)
_RAJ200016 23 41.8536 "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)
_DEJ2000-26 32 37.608 "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)
_RAB195016 20 37.7668 "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)
_DEB1950-26 25 42.655 "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)
_Glon350.9763572 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+15.9417563 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)
34155recno 34155  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

ClusterNGC 6121  Cluster identification (meta.id;meta.main)
ONameM 4  Other cluster identification (meta.id)
RAJ2000245.92439 deg (i) [245.77/295.17] Right Ascension (J2000) (Note 1)   (pos.eq.ra;meta.main)
DEJ2000-26.54378 deg (i) [-53.79/-1.80] Declination (J2000) (Note 1)   (pos.eq.dec;meta.main)
dE(B-V) 0.008 mag [-0.23/0.57] Differential reddening δE(B-V) (changes in the extinction across the field) (Note 2)   (phot.color.excess)
e_dE(B-V) 0.009 mag Error in dE(B-V) (phot.color.excess)
BW 0.77 arcmin [0.5/7.39] Bandwidth used in the resolution map (phys.angSize;src)
  
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