VizieR

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VizieR

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J/A+AS/116/403/table3 VRI photometry of stars in 12 BL Lac objects (Fiorucci+, 1996)
VRcIc comparison stars in the fields of BL Lacertae objects (58 rows)
  recno=35
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ColumnValue  Explain   (UCD)
_RAJ200016 53 47.100 "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+39 44 11.00 "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)
_RAB195016 52 06.555 "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+39 48 59.88 "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)
_Glon063.567694 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+38.873306 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)
35recno 35  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Name A  Names of BL Lac objects and respective comparison stars (meta.id;meta.main)
RA200016 53 47.1 "h:m:s" (i) Right ascension (2000) (pos.eq.ra;meta.main)
DE2000039 44 11 "d:m:s" (i) Declination (2000) (pos.eq.dec;meta.main)
Vmag12.61 mag V Johnson magnitude (phot.mag;em.opt.V)
e_Vmag 0.03 mag Standard deviation on V magnitude (stat.error)
Rcmag12.15 mag Cousins R magnitude (phot.mag;em.opt.R)
e_Rcmag 0.03 mag Standard deviation on Rc magnitude (stat.error)
Icmag11.65 mag Cousins I magnitude (phot.mag;em.opt.I)
e_Icmag 0.04 mag Standard deviation on Ic magnitude (stat.error)
Number 5   Number of nights utilized to calibrate each star (meta.number)
Refer 5  References for those objects that have previously published photometric sequences in at least one of the VRI filters (Note 1)   (meta.ref)
  
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